add lwIP TCP/IP stack as a runtime driver, native socket syscalls, SysGetMemoryStatus replacing CatchAllDebugBucket, fix timeGetTime to return milliseconds, fix SysSleep to interpret argument as milliseconds, SysGetTick now returns microseconds, harden all syscalls against bad user pointers with CopyFromUser/CopyToUser/MmProbeUser throughout, add networking test apps, port-forward 8080 in runa.bat, split LWIP_DRIVER_CFLAGS, add settings.ini to deploy, remove ethernet.c stub

code/syscall/syscall.h

@@ -7,11 +7,13 @@
 #include <intrin.h>
 
 #define SYS_STATUS_SUCCESS       0u
+#define SYS_STATUS_TIMEOUT       3u
 #define SYS_STATUS_PENDING       4u
 #define SYS_STATUS_ALERTED       5u
 #define SYS_STATUS_KERNEL_APC    6u
 #define SYS_STATUS_USER_APC      7u
 #define SYS_STATUS_CANCELLED     0x33u
+#define SYS_STATUS_NOT_FOUND     0x22u
 
 // ---------------------------------------------------------------------------
 // User process/thread environment
@@ -227,11 +229,111 @@ uint64_t SysMousePoll(void);
 uint64_t SysMouseRead(int* dx, int* dy, uint8_t* buttons);
 void     SysMouseGetPos(int* x, int* y);
 
+
 // ---------------------------------------------------------------------------
-// Time and debug (70-72)
+// Native sockets
+// ---------------------------------------------------------------------------
+#define SYS_AF_INET         2u
+#define SYS_SOCK_STREAM     1u
+#define SYS_SOCK_DGRAM      2u
+#define SYS_SOCK_RAW        3u
+#define SYS_IPPROTO_ICMP    1u
+#define SYS_IPPROTO_TCP     6u
+#define SYS_IPPROTO_UDP     17u
+#define SYS_RESOLVE_HOST_NAME_MAX 255u
+
+#define SYS_SOCKET_OPT_RECV_TIMEOUT_MS 1u
+#define SYS_SOCKET_OPT_SEND_TIMEOUT_MS 2u
+#define SYS_SOCKET_OPT_NONBLOCKING     3u
+
+#define SYS_POLL_READ     0x0001u
+#define SYS_POLL_WRITE    0x0002u
+#define SYS_POLL_ERROR    0x0004u
+#define SYS_POLL_HANGUP   0x0008u
+#define SYS_POLL_INVALID  0x0010u
+#define SYS_POLL_TIMEOUT_INFINITE 0xFFFFFFFFu
+
+#define SYS_SHUTDOWN_READ   0u
+#define SYS_SHUTDOWN_WRITE  1u
+#define SYS_SHUTDOWN_BOTH   2u
+
+typedef struct SYS_SOCKET_ADDRESS_IPV4 {
+    uint16_t Family;       // SYS_AF_INET
+    uint16_t Port;         // host byte order
+    uint8_t  Address[4];   // dotted-quad bytes, e.g. {10,0,2,2}
+    uint8_t  Reserved[8];
+} SYS_SOCKET_ADDRESS_IPV4;
+
+typedef struct SYS_SOCKET_SEND_TO_REQUEST {
+    const void* Buffer;
+    size_t Length;
+    uint32_t Flags;
+    uint32_t Reserved;
+    const SYS_SOCKET_ADDRESS_IPV4* RemoteAddress;
+    size_t RemoteAddressSize;
+    size_t* SentOut;
+} SYS_SOCKET_SEND_TO_REQUEST;
+
+typedef struct SYS_SOCKET_RECV_FROM_REQUEST {
+    void* Buffer;
+    size_t Length;
+    uint32_t Flags;
+    uint32_t Reserved;
+    SYS_SOCKET_ADDRESS_IPV4* RemoteAddressOut;
+    size_t* RemoteAddressSizeInOut;
+    size_t* ReceivedOut;
+} SYS_SOCKET_RECV_FROM_REQUEST;
+
+
+typedef struct SYS_RESOLVE_HOST_REQUEST {
+    const char* Name;
+    size_t NameLength;
+    uint32_t Family;
+    uint32_t Flags;
+    SYS_SOCKET_ADDRESS_IPV4* AddressOut;
+    size_t* AddressSizeInOut;
+} SYS_RESOLVE_HOST_REQUEST;
+
+typedef struct SYS_SOCKET_OPTION_REQUEST {
+    uint32_t Option;
+    uint32_t Reserved;
+    void* Value;
+    size_t ValueSize;
+    size_t* ActualSizeOut;
+} SYS_SOCKET_OPTION_REQUEST;
+
+typedef struct SYS_POLLFD {
+    uint32_t Handle;
+    uint32_t Events;
+    uint32_t ReturnedEvents;
+} SYS_POLLFD;
+
+uint32_t SysSocket(uint32_t domain, uint32_t type, uint32_t protocol, uint32_t* handleOut);
+uint32_t SysBind(uint32_t socket, const SYS_SOCKET_ADDRESS_IPV4* address, size_t addressSize);
+uint32_t SysListen(uint32_t socket, uint32_t backlog);
+uint32_t SysAccept(uint32_t socket, SYS_SOCKET_ADDRESS_IPV4* remoteAddressOut, size_t* remoteAddressSizeInOut, uint32_t* acceptedHandleOut);
+uint32_t SysConnect(uint32_t socket, const SYS_SOCKET_ADDRESS_IPV4* address, size_t addressSize);
+uint32_t SysSend(uint32_t socket, const void* buffer, size_t length, uint32_t flags, size_t* sentOut);
+uint32_t SysRecv(uint32_t socket, void* buffer, size_t length, uint32_t flags, size_t* receivedOut);
+uint32_t SysShutdown(uint32_t socket, uint32_t how);
+uint32_t SysSendTo(uint32_t socket, const SYS_SOCKET_SEND_TO_REQUEST* request);
+uint32_t SysRecvFrom(uint32_t socket, const SYS_SOCKET_RECV_FROM_REQUEST* request);
+uint32_t SysResolveHost(const SYS_RESOLVE_HOST_REQUEST* request);
+uint32_t SysSetSocketOption(uint32_t socket, const SYS_SOCKET_OPTION_REQUEST* request);
+uint32_t SysGetSocketOption(uint32_t socket, const SYS_SOCKET_OPTION_REQUEST* request);
+uint32_t SysPoll(SYS_POLLFD* fds, size_t count, uint32_t timeoutMs, size_t* readyOut);
+
+typedef struct SYS_MEMORY_STATUS {
+    uint64_t FreePhysicalBytes;
+    uint64_t KernelPoolBytes;
+    uint64_t UserHeapBytes;
+} SYS_MEMORY_STATUS;
+
+// ---------------------------------------------------------------------------
+// Time and diagnostics
 // ---------------------------------------------------------------------------
 uint64_t SysGetTick(void);
 uint32_t SysDebugPrint(const char* str);
 uint32_t SysQueryTrapFrame(SYS_TRAP_FRAME_INFO* info);
 
-uint64_t SysCatchAllDebugBucket(uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5);
+uint32_t SysGetMemoryStatus(SYS_MEMORY_STATUS* statusOut);