--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/src/win/getaddrinfo.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,388 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+
+#include "uv.h"
+#include "internal.h"
+#include "req-inl.h"
+#include "idna.h"
+
+/* EAI_* constants. */
+#include <winsock2.h>
+
+/* Needed for ConvertInterfaceIndexToLuid and ConvertInterfaceLuidToNameA */
+#include <iphlpapi.h>
+
+int uv__getaddrinfo_translate_error(int sys_err) {
+  switch (sys_err) {
+    case 0:                       return 0;
+    case WSATRY_AGAIN:            return UV_EAI_AGAIN;
+    case WSAEINVAL:               return UV_EAI_BADFLAGS;
+    case WSANO_RECOVERY:          return UV_EAI_FAIL;
+    case WSAEAFNOSUPPORT:         return UV_EAI_FAMILY;
+    case WSA_NOT_ENOUGH_MEMORY:   return UV_EAI_MEMORY;
+    case WSAHOST_NOT_FOUND:       return UV_EAI_NONAME;
+    case WSATYPE_NOT_FOUND:       return UV_EAI_SERVICE;
+    case WSAESOCKTNOSUPPORT:      return UV_EAI_SOCKTYPE;
+    default:                      return uv_translate_sys_error(sys_err);
+  }
+}
+
+
+/*
+ * MinGW is missing this
+ */
+#if !defined(_MSC_VER) && !defined(__MINGW64_VERSION_MAJOR)
+  typedef struct addrinfoW {
+    int ai_flags;
+    int ai_family;
+    int ai_socktype;
+    int ai_protocol;
+    size_t ai_addrlen;
+    WCHAR* ai_canonname;
+    struct sockaddr* ai_addr;
+    struct addrinfoW* ai_next;
+  } ADDRINFOW, *PADDRINFOW;
+
+  DECLSPEC_IMPORT int WSAAPI GetAddrInfoW(const WCHAR* node,
+                                          const WCHAR* service,
+                                          const ADDRINFOW* hints,
+                                          PADDRINFOW* result);
+
+  DECLSPEC_IMPORT void WSAAPI FreeAddrInfoW(PADDRINFOW pAddrInfo);
+#endif
+
+static size_t align_offset(size_t off, size_t alignment) {
+  return ((off + alignment - 1) / alignment) * alignment;
+}
+
+#ifndef NDIS_IF_MAX_STRING_SIZE
+#define NDIS_IF_MAX_STRING_SIZE IF_MAX_STRING_SIZE
+#endif
+
+static void uv__getaddrinfo_work(struct uv__work* w) {
+  uv_getaddrinfo_t* req;
+  struct addrinfoW* hints;
+  int err;
+
+  req = container_of(w, uv_getaddrinfo_t, work_req);
+  hints = req->addrinfow;
+  req->addrinfow = NULL;
+  err = GetAddrInfoW(req->node, req->service, hints, &req->addrinfow);
+  req->retcode = uv__getaddrinfo_translate_error(err);
+}
+
+
+/*
+ * Called from uv_run when complete. Call user specified callback
+ * then free returned addrinfo
+ * Returned addrinfo strings are converted from UTF-16 to UTF-8.
+ *
+ * To minimize allocation we calculate total size required,
+ * and copy all structs and referenced strings into the one block.
+ * Each size calculation is adjusted to avoid unaligned pointers.
+ */
+static void uv__getaddrinfo_done(struct uv__work* w, int status) {
+  uv_getaddrinfo_t* req = container_of(w, uv_getaddrinfo_t, work_req);
+
+  /* release input parameter memory */
+  uv__free(req->alloc);
+  req->alloc = NULL;
+
+  if (status == UV_ECANCELED) {
+    assert(req->retcode == 0);
+    req->retcode = UV_EAI_CANCELED;
+    goto complete;
+  }
+
+  if (req->retcode == 0) {
+    char* alloc_ptr = NULL;
+    size_t cur_off = 0;
+    size_t addrinfo_len;
+    /* Convert addrinfoW to addrinfo. First calculate required length. */
+    struct addrinfoW* addrinfow_ptr = req->addrinfow;
+    while (addrinfow_ptr != NULL) {
+      cur_off = align_offset(cur_off, sizeof(void*));
+      cur_off += sizeof(struct addrinfo);
+      /* TODO: This alignment could be smaller, if we could
+	           portably get the alignment for sockaddr. */
+      cur_off = align_offset(cur_off, sizeof(void*));
+      cur_off += addrinfow_ptr->ai_addrlen;
+      if (addrinfow_ptr->ai_canonname != NULL) {
+        ssize_t name_len =
+            uv_utf16_length_as_wtf8(addrinfow_ptr->ai_canonname, -1);
+        if (name_len < 0) {
+          req->retcode = name_len;
+          goto complete;
+        }
+        cur_off += name_len + 1;
+      }
+      addrinfow_ptr = addrinfow_ptr->ai_next;
+    }
+
+    /* allocate memory for addrinfo results */
+    addrinfo_len = cur_off;
+    alloc_ptr = uv__malloc(addrinfo_len);
+
+    /* do conversions */
+    if (alloc_ptr != NULL) {
+      struct addrinfo *addrinfo_ptr = (struct addrinfo *)alloc_ptr;
+      cur_off = 0;
+      addrinfow_ptr = req->addrinfow;
+
+      for (;;) {
+        cur_off += sizeof(struct addrinfo);
+        assert(cur_off <= addrinfo_len);
+        /* copy addrinfo struct data */
+        addrinfo_ptr->ai_family = addrinfow_ptr->ai_family;
+        addrinfo_ptr->ai_socktype = addrinfow_ptr->ai_socktype;
+        addrinfo_ptr->ai_protocol = addrinfow_ptr->ai_protocol;
+        addrinfo_ptr->ai_flags = addrinfow_ptr->ai_flags;
+        addrinfo_ptr->ai_addrlen = addrinfow_ptr->ai_addrlen;
+        addrinfo_ptr->ai_canonname = NULL;
+        addrinfo_ptr->ai_addr = NULL;
+        addrinfo_ptr->ai_next = NULL;
+
+        /* copy sockaddr */
+        if (addrinfo_ptr->ai_addrlen > 0) {
+          cur_off = align_offset(cur_off, sizeof(void *));
+          addrinfo_ptr->ai_addr = (struct sockaddr *)(alloc_ptr + cur_off);
+          cur_off += addrinfo_ptr->ai_addrlen;
+          assert(cur_off <= addrinfo_len);
+          memcpy(addrinfo_ptr->ai_addr,
+	             addrinfow_ptr->ai_addr,
+                 addrinfo_ptr->ai_addrlen);
+        }
+
+        /* convert canonical name to UTF-8 */
+        if (addrinfow_ptr->ai_canonname != NULL) {
+          ssize_t name_len = addrinfo_len - cur_off;
+          addrinfo_ptr->ai_canonname = alloc_ptr + cur_off;
+          int r = uv__copy_utf16_to_utf8(addrinfow_ptr->ai_canonname,
+                                         -1,
+                                         addrinfo_ptr->ai_canonname,
+                                         (size_t*)&name_len);
+          assert(r == 0);
+          cur_off += name_len + 1;
+          assert(cur_off <= addrinfo_len);
+        }
+
+        /* set next ptr */
+        addrinfow_ptr = addrinfow_ptr->ai_next;
+        if (addrinfow_ptr == NULL)
+          break;
+        cur_off = align_offset(cur_off, sizeof(void *));
+        struct addrinfo *next_addrinfo_ptr = (struct addrinfo *)(alloc_ptr + cur_off);
+        addrinfo_ptr->ai_next = next_addrinfo_ptr;
+        addrinfo_ptr = next_addrinfo_ptr;
+      }
+      req->addrinfo = (struct addrinfo*)alloc_ptr;
+    } else {
+      req->retcode = UV_EAI_MEMORY;
+    }
+  }
+
+  /* return memory to system */
+  if (req->addrinfow != NULL) {
+    FreeAddrInfoW(req->addrinfow);
+    req->addrinfow = NULL;
+  }
+
+complete:
+  uv__req_unregister(req->loop);
+
+  /* finally do callback with converted result */
+  if (req->getaddrinfo_cb)
+    req->getaddrinfo_cb(req, req->retcode, req->addrinfo);
+}
+
+
+void uv_freeaddrinfo(struct addrinfo* ai) {
+  char* alloc_ptr = (char*)ai;
+
+  /* release copied result memory */
+  uv__free(alloc_ptr);
+}
+
+
+/*
+ * Entry point for getaddrinfo
+ * we convert the UTF-8 strings to UNICODE
+ * and save the UNICODE string pointers in the req
+ * We also copy hints so that caller does not need to keep memory until the
+ * callback.
+ * return 0 if a callback will be made
+ * return error code if validation fails
+ *
+ * To minimize allocation we calculate total size required,
+ * and copy all structs and referenced strings into the one block.
+ * Each size calculation is adjusted to avoid unaligned pointers.
+ */
+int uv_getaddrinfo(uv_loop_t* loop,
+                   uv_getaddrinfo_t* req,
+                   uv_getaddrinfo_cb getaddrinfo_cb,
+                   const char* node,
+                   const char* service,
+                   const struct addrinfo* hints) {
+  char hostname_ascii[256];
+  size_t off = 0;
+  size_t nodesize = 0;
+  size_t servicesize = 0;
+  size_t serviceoff = 0;
+  size_t hintssize = 0;
+  size_t hintoff = 0;
+  ssize_t rc;
+
+  if (req == NULL || (node == NULL && service == NULL)) {
+    return UV_EINVAL;
+  }
+
+  UV_REQ_INIT(req, UV_GETADDRINFO);
+  req->getaddrinfo_cb = getaddrinfo_cb;
+  req->addrinfo = NULL;
+  req->loop = loop;
+  req->retcode = 0;
+
+  /* calculate required memory size for all input values */
+  if (node != NULL) {
+    rc = uv__idna_toascii(node,
+                          node + strlen(node),
+                          hostname_ascii,
+                          hostname_ascii + sizeof(hostname_ascii));
+    if (rc < 0)
+      return rc;
+    nodesize = strlen(hostname_ascii) + 1;
+    node = hostname_ascii;
+    off += nodesize * sizeof(WCHAR);
+  }
+
+  if (service != NULL) {
+    rc = uv_wtf8_length_as_utf16(service);
+    if (rc < 0)
+       return rc;
+    servicesize = rc;
+    off = align_offset(off, sizeof(WCHAR));
+    serviceoff = off;
+    off += servicesize * sizeof(WCHAR);
+  }
+
+  if (hints != NULL) {
+    off = align_offset(off, sizeof(void *));
+    hintoff = off;
+    hintssize = sizeof(struct addrinfoW);
+    off += hintssize;
+  }
+
+  /* allocate memory for inputs, and partition it as needed */
+  req->alloc = uv__malloc(off);
+  if (!req->alloc)
+    return UV_ENOMEM;
+
+  /* Convert node string to UTF16 into allocated memory and save pointer in the
+   * request. The node here has been converted to ascii. */
+  if (node != NULL) {
+    req->node = (WCHAR*) req->alloc;
+    uv_wtf8_to_utf16(node, req->node, nodesize);
+  } else {
+    req->node = NULL;
+  }
+
+  /* Convert service string to UTF16 into allocated memory and save pointer in
+   * the req. */
+  if (service != NULL) {
+    req->service = (WCHAR*) ((char*) req->alloc + serviceoff);
+    uv_wtf8_to_utf16(service, req->service, servicesize);
+  } else {
+    req->service = NULL;
+  }
+
+  /* copy hints to allocated memory and save pointer in req */
+  if (hints != NULL) {
+    req->addrinfow = (struct addrinfoW*) ((char*) req->alloc + hintoff);
+    req->addrinfow->ai_family = hints->ai_family;
+    req->addrinfow->ai_socktype = hints->ai_socktype;
+    req->addrinfow->ai_protocol = hints->ai_protocol;
+    req->addrinfow->ai_flags = hints->ai_flags;
+    req->addrinfow->ai_addrlen = 0;
+    req->addrinfow->ai_canonname = NULL;
+    req->addrinfow->ai_addr = NULL;
+    req->addrinfow->ai_next = NULL;
+  } else {
+    req->addrinfow = NULL;
+  }
+
+  uv__req_register(loop);
+
+  if (getaddrinfo_cb) {
+    uv__work_submit(loop,
+                    &req->work_req,
+                    UV__WORK_SLOW_IO,
+                    uv__getaddrinfo_work,
+                    uv__getaddrinfo_done);
+    return 0;
+  } else {
+    uv__getaddrinfo_work(&req->work_req);
+    uv__getaddrinfo_done(&req->work_req, 0);
+    return req->retcode;
+  }
+}
+
+int uv_if_indextoname(unsigned int ifindex, char* buffer, size_t* size) {
+  NET_LUID luid;
+  wchar_t wname[NDIS_IF_MAX_STRING_SIZE + 1]; /* Add one for the NUL. */
+  int r;
+
+  if (buffer == NULL || size == NULL || *size == 0)
+    return UV_EINVAL;
+
+  r = ConvertInterfaceIndexToLuid(ifindex, &luid);
+
+  if (r != 0)
+    return uv_translate_sys_error(r);
+
+  r = ConvertInterfaceLuidToNameW(&luid, wname, ARRAY_SIZE(wname));
+
+  if (r != 0)
+    return uv_translate_sys_error(r);
+
+  return uv__copy_utf16_to_utf8(wname, -1, buffer, size);
+}
+
+int uv_if_indextoiid(unsigned int ifindex, char* buffer, size_t* size) {
+  int r;
+
+  if (buffer == NULL || size == NULL || *size == 0)
+    return UV_EINVAL;
+
+  r = snprintf(buffer, *size, "%d", ifindex);
+
+  if (r < 0)
+    return uv_translate_sys_error(r);
+
+  if (r >= (int) *size) {
+    *size = r + 1;
+    return UV_ENOBUFS;
+  }
+
+  *size = r;
+  return 0;
+}