Build: incremental build support, Windows uasync fixes, TUN cross-platform refactoring

- build.sh: added --full flag for full rebuild (autoreconf + configure + make)
- build_direct.sh: incremental compilation (skips unchanged files)
- build_full.bat: new Windows batch for full rebuild
- configure.ac: fixed Windows detection using AC_COMPILE_IFELSE
- lib/u_async.c/h: Windows wakeup socket support, uasync_post for thread-safe callbacks
- src/tun_if.c/h: cross-platform TUN refactoring, Windows read thread support
- src/tun_windows.c: Windows TUN implementation improvements
- src/control_server.c: removed premature return statement
- src/routing.c: include ordering fix
- src/utun.c: windows compat includes
- Deleted obsolete net_emulator/Makefile and tinycrypt/Makefile

lib/u_async.c

@@ -8,6 +8,13 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <limits.h>
+#include <pthread.h>
+
+#ifndef _WIN32
+#include <windows.h>
+#else
+#include <sys/time.h>
+#endif
 
 // Platform-specific includes
 #ifdef __linux__
@@ -276,7 +283,22 @@ static void timeout_node_free_callback(void* user_data, void* data) {
 
 // Helper to get current time
 static void get_current_time(struct timeval* tv) {
+#ifdef _WIN32
+    // Для Windows используем GetTickCount или другие механизмы
+    FILETIME ft;
+    GetSystemTimeAsFileTime(&ft);
+
+    ULARGE_INTEGER ul;
+    ul.LowPart = ft.dwLowDateTime;
+    ul.HighPart = ft.dwHighDateTime;
+
+    // Конвертируем 100-наносекундные интервалы в секунды и микросекунды
+    tv->tv_sec = (long)((ul.QuadPart - 116444736000000000LL) / 10000000);
+    tv->tv_usec = (long)((ul.QuadPart % 10000000) / 10);
+#else
+    // Для Linux и других Unix-подобных систем используем gettimeofday
     gettimeofday(tv, NULL);
+#endif
 }
 
 
@@ -292,6 +314,55 @@ static void drain_wakeup_pipe(struct UASYNC* ua) {
     }
 }
 
+// Process posted tasks (lock-free during execution)
+static void process_posted_tasks(struct UASYNC* ua) {
+    if (!ua) return;
+
+    struct posted_task* list = NULL;
+
+#ifdef _WIN32
+    EnterCriticalSection(&ua->posted_lock);
+#else
+    pthread_mutex_lock(&ua->posted_lock);
+#endif
+    list = ua->posted_tasks_head;
+    ua->posted_tasks_head = NULL;
+#ifdef _WIN32
+    LeaveCriticalSection(&ua->posted_lock);
+#else
+    pthread_mutex_unlock(&ua->posted_lock);
+#endif
+
+    while (list) {
+        struct posted_task* t = list;
+        list = list->next;
+
+        if (t->callback) {
+            t->callback(t->arg);
+        }
+        free(t);
+    }
+}
+
+// Unified wakeup handler (drain + execute posted callbacks)
+static void handle_wakeup(struct UASYNC* ua) {
+    if (!ua || !ua->wakeup_initialized) return;
+
+    // Drain the wakeup pipe/socket
+#ifdef _WIN32
+    char buf[64];
+    SOCKET s = (SOCKET)(intptr_t)ua->wakeup_pipe[0];
+    while (recv(s, buf, sizeof(buf), 0) > 0) {}
+#else
+    char buf[64];
+    while (read(ua->wakeup_pipe[0], buf, sizeof(buf)) > 0) {}
+#endif
+
+    // Execute all posted callbacks (in main thread)
+    process_posted_tasks(ua);
+}
+
+
 // Helper to add timeval: tv += dt (timebase units)
 static void timeval_add_tb(struct timeval* tv, int dt) {
     tv->tv_usec += (dt % 10000) * 100;
@@ -978,73 +1049,137 @@ void uasync_poll(struct UASYNC* ua, int timeout_tb) {
 }
 
 
+// Put this near the top of u_async.c, after includes and before uasync_create
+
+
+#ifdef _WIN32
+static void wakeup_read_callback_win(socket_t sock, void* arg) {
+    (void)sock;                     // не нужен
+    handle_wakeup((struct UASYNC*)arg);
+}
+#else
+static void wakeup_read_callback_posix(int fd, void* arg) {
+    (void)fd;
+    handle_wakeup((struct UASYNC*)arg);
+}
+#endif
+
 
 // ========== Instance management functions ==========
 
+// Modified function in u_async.c: uasync_create
+// Changes: Use self-connected UDP socket for wakeup on Windows instead of pipe.
+// This ensures the wakeup is a selectable SOCKET.
+
 struct UASYNC* uasync_create(void) {
-    // Initialize socket platform first (WSAStartup on Windows)
-    if (socket_platform_init() != 0) {
-        DEBUG_ERROR(DEBUG_CATEGORY_SOCKET, "Failed to initialize socket platform");
+    struct UASYNC* ua = calloc(1, sizeof(struct UASYNC));
+    if (!ua) return NULL;
+
+    ua->timer_alloc_count = 0;
+    ua->timer_free_count = 0;
+    ua->socket_alloc_count = 0;
+    ua->socket_free_count = 0;
+
+    ua->poll_fds = NULL;
+    ua->poll_fds_capacity = 0;
+    ua->poll_fds_count = 0;
+    ua->poll_fds_dirty = 1;
+
+    ua->wakeup_pipe[0] = -1;
+    ua->wakeup_pipe[1] = -1;
+    ua->wakeup_initialized = 0;
+    ua->posted_tasks_head = NULL;
+
+#ifdef _WIN32
+    // Windows: self-connected UDP socket for wakeup
+    SOCKET r = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    SOCKET w = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    if (r == INVALID_SOCKET || w == INVALID_SOCKET) {
+        DEBUG_ERROR(DEBUG_CATEGORY_UASYNC, "Failed to create wakeup sockets");
+        free(ua);
         return NULL;
     }
 
-    struct UASYNC* ua = malloc(sizeof(struct UASYNC));
-    if (!ua) {
-        socket_platform_cleanup();
+    struct sockaddr_in addr = {0};
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+    addr.sin_port = 0;
+
+    if (bind(r, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR ||
+        getsockname(r, (struct sockaddr*)&addr, &(int){sizeof(addr)}) == SOCKET_ERROR ||
+        connect(w, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {
+        closesocket(r);
+        closesocket(w);
+        DEBUG_ERROR(DEBUG_CATEGORY_UASYNC, "Wakeup socket setup failed: %d", WSAGetLastError());
+        free(ua);
         return NULL;
     }
-    
-    memset(ua, 0, sizeof(struct UASYNC));
-    ua->wakeup_pipe[0] = -1;
-    ua->wakeup_pipe[1] = -1;
-    ua->wakeup_initialized = 0;
-    
-    // Create wakeup pipe (skip on Windows - pipes don't work with poll/WSAPoll)
-#ifndef _WIN32
-    if (pipe(ua->wakeup_pipe) < 0) {
-        DEBUG_WARN(DEBUG_CATEGORY_UASYNC, "Failed to create wakeup pipe: %s", strerror(errno));
-        // Continue without wakeup mechanism
-        ua->wakeup_pipe[0] = -1;
-        ua->wakeup_pipe[1] = -1;
-    } else {
-        ua->wakeup_initialized = 1;
-        // Set non-blocking on read end to avoid blocking if pipe is full
-        int flags = fcntl(ua->wakeup_pipe[0], F_GETFL, 0);
-        if (flags >= 0) {
-            fcntl(ua->wakeup_pipe[0], F_SETFL, flags | O_NONBLOCK);
-        }
-    }
+
+    ua->wakeup_pipe[0] = (int)(intptr_t)r;
+    ua->wakeup_pipe[1] = (int)(intptr_t)w;
+    ua->wakeup_initialized = 1;
+
+    u_long mode = 1;
+    ioctlsocket(r, FIONBIO, &mode);
+
+    // Register the read socket with uasync
+    uasync_add_socket_t(ua, r, wakeup_read_callback_win, NULL, NULL, ua);  // ← ua как user_data
+//    uasync_add_socket_t(ua, r, wakeup_read_callback_win, NULL, NULL, NULL);
+    InitializeCriticalSection(&ua->posted_lock);
+
 #else
-    // On Windows, pipes don't work with WSAPoll - skip wakeup mechanism
-    ua->wakeup_pipe[0] = -1;
-    ua->wakeup_pipe[1] = -1;
-    ua->wakeup_initialized = 0;
+    // POSIX pipe
+    if (pipe(ua->wakeup_pipe) != 0) {
+        DEBUG_ERROR(DEBUG_CATEGORY_UASYNC, "pipe() failed: %s", strerror(errno));
+        free(ua);
+        return NULL;
+    }
+    ua->wakeup_initialized = 1;
+
+    fcntl(ua->wakeup_pipe[0], F_SETFL, fcntl(ua->wakeup_pipe[0], F_GETFL, 0) | O_NONBLOCK);
+    fcntl(ua->wakeup_pipe[1], F_SETFL, fcntl(ua->wakeup_pipe[1], F_GETFL, 0) | O_NONBLOCK);
+
+    if (!ua->use_epoll) {
+        uasync_add_socket(ua, ua->wakeup_pipe[0], wakeup_read_callback_posix, NULL, NULL, ua);  // ← ua
+    }
+    pthread_mutex_init(&ua->posted_lock, NULL);
+
 #endif
-    
+
     ua->sockets = socket_array_create(16);
     if (!ua->sockets) {
         if (ua->wakeup_initialized) {
+#ifdef _WIN32
+            closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[0]);
+            closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[1]);
+#else
             close(ua->wakeup_pipe[0]);
             close(ua->wakeup_pipe[1]);
+#endif
         }
         free(ua);
         return NULL;
     }
-    
+
     ua->timeout_heap = timeout_heap_create(16);
     if (!ua->timeout_heap) {
         socket_array_destroy(ua->sockets);
         if (ua->wakeup_initialized) {
+#ifdef _WIN32
+            closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[0]);
+            closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[1]);
+#else
             close(ua->wakeup_pipe[0]);
             close(ua->wakeup_pipe[1]);
+#endif
         }
         free(ua);
         return NULL;
     }
-    
+
     // Set callback to free timeout nodes and update counters
     timeout_heap_set_free_callback(ua->timeout_heap, ua, timeout_node_free_callback);
-    
+
     // Initialize epoll on Linux
     ua->epoll_fd = -1;
     ua->use_epoll = 0;
@@ -1066,7 +1201,7 @@ struct UASYNC* uasync_create(void) {
         DEBUG_WARN(DEBUG_CATEGORY_UASYNC, "Failed to create epoll fd, falling back to poll: %s", strerror(errno));
     }
 #endif
-    
+
     return ua;
 }
 
@@ -1119,14 +1254,17 @@ void uasync_print_resources(struct UASYNC* ua, const char* prefix) {
     printf("🔚 %s: End of resource report\n\n", prefix);
 }
 
+// Modified function in u_async.c: uasync_destroy
+// Changes: Close wakeup sockets properly on Windows.
+
 void uasync_destroy(struct UASYNC* ua, int close_fds) {
     if (!ua) return;
-    
+
     DEBUG_DEBUG(DEBUG_CATEGORY_TIMERS, "uasync_destroy: starting cleanup for ua=%p", ua);
-    
+
     // Диагностика ресурсов перед очисткой
     uasync_print_resources(ua, "BEFORE_DESTROY");
-    
+
     // Check for potential memory leaks
     if (ua->timer_alloc_count != ua->timer_free_count || ua->socket_alloc_count != ua->socket_free_count) {
         DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Memory leaks detected before cleanup: timers %zu/%zu, sockets %zu/%zu",
@@ -1139,7 +1277,7 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
                    (ssize_t)(ua->socket_alloc_count - ua->socket_free_count));
         // Continue cleanup, will abort after if leaks remain
     }
-    
+
     // Free all remaining timeouts
     if (ua->timeout_heap) {
         size_t freed_count = 0;
@@ -1147,7 +1285,7 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
             TimeoutEntry entry;
             if (timeout_heap_pop(ua->timeout_heap, &entry) != 0) break;
             struct timeout_node* node = (struct timeout_node*)entry.data;
-            
+
             // Free all timer nodes (avoid double-free bug)
             if (node) {
                 ua->timer_free_count++;
@@ -1156,7 +1294,7 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
         }
         timeout_heap_destroy(ua->timeout_heap);
     }
-    
+
     // Free all socket nodes using array approach
     if (ua->sockets) {
         // Count and free all active sockets
@@ -1164,7 +1302,15 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
         for (int i = 0; i < ua->sockets->capacity; i++) {
             if (ua->sockets->sockets[i].active) {
                 if (close_fds && ua->sockets->sockets[i].fd >= 0) {
+#ifdef _WIN32
+                    if (ua->sockets->sockets[i].type == SOCKET_NODE_TYPE_SOCK) {
+                        closesocket(ua->sockets->sockets[i].sock);
+                    } else {
+                        close(ua->sockets->sockets[i].fd);  // For pipes/FDs
+                    }
+#else
                     close(ua->sockets->sockets[i].fd);
+#endif
                 }
                 ua->socket_free_count++;
                 freed_count++;
@@ -1173,23 +1319,28 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
         DEBUG_DEBUG(DEBUG_CATEGORY_MEMORY, "Freed %d socket nodes in destroy", freed_count);
         socket_array_destroy(ua->sockets);
     }
-    
-    // Close wakeup pipe
+
+    // Close wakeup pipe/sockets
     if (ua->wakeup_initialized) {
+#ifdef _WIN32
+        closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[0]);
+        closesocket((SOCKET)(intptr_t)ua->wakeup_pipe[1]);
+#else
         close(ua->wakeup_pipe[0]);
         close(ua->wakeup_pipe[1]);
+#endif
     }
-    
+
     // Free cached poll_fds
     free(ua->poll_fds);
-    
+
     // Close epoll fd on Linux
 #if HAS_EPOLL
     if (ua->epoll_fd >= 0) {
         close(ua->epoll_fd);
     }
 #endif
-    
+
     // Final leak check
     if (ua->timer_alloc_count != ua->timer_free_count || ua->socket_alloc_count != ua->socket_free_count) {
         DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Memory leaks detected after cleanup: timers %zu/%zu, sockets %zu/%zu",
@@ -1202,10 +1353,22 @@ void uasync_destroy(struct UASYNC* ua, int close_fds) {
                    (ssize_t)(ua->socket_alloc_count - ua->socket_free_count));
         abort();
     }
-    
+
     DEBUG_DEBUG(DEBUG_CATEGORY_TIMERS, "uasync_destroy: completed successfully for ua=%p", ua);
+
+    while (ua->posted_tasks_head) {
+        struct posted_task* t = ua->posted_tasks_head;
+        ua->posted_tasks_head = t->next;
+        free(t);
+    }
+#ifdef _WIN32
+    DeleteCriticalSection(&ua->posted_lock);
+#else
+    pthread_mutex_destroy(&ua->posted_lock);
+#endif
+
     free(ua);
-    
+
     // Cleanup socket platform (WSACleanup on Windows)
     socket_platform_cleanup();
 }
@@ -1235,14 +1398,42 @@ void uasync_get_stats(struct UASYNC* ua, size_t* timer_alloc, size_t* timer_free
     if (socket_free) *socket_free = ua->socket_free_count;
 }
 
-// Get global instance for backward compatibility
+void uasync_post(struct UASYNC* ua, uasync_post_callback_t callback, void* arg) {
+    if (!ua || !callback) return;
+
+    struct posted_task* task = malloc(sizeof(struct posted_task));
+    if (!task) return;
+
+    task->callback = callback;
+    task->arg = arg;
+    task->next = NULL;
+
+#ifdef _WIN32
+    EnterCriticalSection(&ua->posted_lock);
+#else
+    pthread_mutex_lock(&ua->posted_lock);
+#endif
+    task->next = ua->posted_tasks_head;
+    ua->posted_tasks_head = task;
+#ifdef _WIN32
+    LeaveCriticalSection(&ua->posted_lock);
+#else
+    pthread_mutex_unlock(&ua->posted_lock);
+#endif
+
+    uasync_wakeup(ua);   // будим mainloop
+}
 
 // Wakeup mechanism
 int uasync_wakeup(struct UASYNC* ua) {
     if (!ua || !ua->wakeup_initialized) return -1;
-    
+
     char byte = 0;
+#ifdef _WIN32
+    int ret = send((SOCKET)(intptr_t)ua->wakeup_pipe[1], &byte, 1, 0);
+#else
     ssize_t ret = write(ua->wakeup_pipe[1], &byte, 1);
+#endif
     if (ret != 1) {
         // Don't print error from signal handler
         return -1;