--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/src/unix/getaddrinfo.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,252 @@
+/* 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.
+ */
+
+/* Expose glibc-specific EAI_* error codes. Needs to be defined before we
+ * include any headers.
+ */
+
+#include "uv.h"
+#include "internal.h"
+#include "idna.h"
+
+#include <errno.h>
+#include <stddef.h> /* NULL */
+#include <stdlib.h>
+#include <string.h>
+#include <net/if.h> /* if_indextoname() */
+
+/* EAI_* constants. */
+#include <netdb.h>
+
+
+int uv__getaddrinfo_translate_error(int sys_err) {
+  switch (sys_err) {
+  case 0: return 0;
+#if defined(EAI_ADDRFAMILY)
+  case EAI_ADDRFAMILY: return UV_EAI_ADDRFAMILY;
+#endif
+#if defined(EAI_AGAIN)
+  case EAI_AGAIN: return UV_EAI_AGAIN;
+#endif
+#if defined(EAI_BADFLAGS)
+  case EAI_BADFLAGS: return UV_EAI_BADFLAGS;
+#endif
+#if defined(EAI_BADHINTS)
+  case EAI_BADHINTS: return UV_EAI_BADHINTS;
+#endif
+#if defined(EAI_CANCELED)
+  case EAI_CANCELED: return UV_EAI_CANCELED;
+#endif
+#if defined(EAI_FAIL)
+  case EAI_FAIL: return UV_EAI_FAIL;
+#endif
+#if defined(EAI_FAMILY)
+  case EAI_FAMILY: return UV_EAI_FAMILY;
+#endif
+#if defined(EAI_MEMORY)
+  case EAI_MEMORY: return UV_EAI_MEMORY;
+#endif
+#if defined(EAI_NODATA)
+  case EAI_NODATA: return UV_EAI_NODATA;
+#endif
+#if defined(EAI_NONAME)
+# if !defined(EAI_NODATA) || EAI_NODATA != EAI_NONAME
+  case EAI_NONAME: return UV_EAI_NONAME;
+# endif
+#endif
+#if defined(EAI_OVERFLOW)
+  case EAI_OVERFLOW: return UV_EAI_OVERFLOW;
+#endif
+#if defined(EAI_PROTOCOL)
+  case EAI_PROTOCOL: return UV_EAI_PROTOCOL;
+#endif
+#if defined(EAI_SERVICE)
+  case EAI_SERVICE: return UV_EAI_SERVICE;
+#endif
+#if defined(EAI_SOCKTYPE)
+  case EAI_SOCKTYPE: return UV_EAI_SOCKTYPE;
+#endif
+#if defined(EAI_SYSTEM)
+  case EAI_SYSTEM: return UV__ERR(errno);
+#endif
+  }
+  assert(!"unknown EAI_* error code");
+  abort();
+#ifndef __SUNPRO_C
+  return 0;  /* Pacify compiler. */
+#endif
+}
+
+
+static void uv__getaddrinfo_work(struct uv__work* w) {
+  uv_getaddrinfo_t* req;
+  int err;
+
+  req = container_of(w, uv_getaddrinfo_t, work_req);
+  err = getaddrinfo(req->hostname, req->service, req->hints, &req->addrinfo);
+  req->retcode = uv__getaddrinfo_translate_error(err);
+}
+
+
+static void uv__getaddrinfo_done(struct uv__work* w, int status) {
+  uv_getaddrinfo_t* req;
+
+  req = container_of(w, uv_getaddrinfo_t, work_req);
+  uv__req_unregister(req->loop);
+
+  /* See initialization in uv_getaddrinfo(). */
+  if (req->hints)
+    uv__free(req->hints);
+  else if (req->service)
+    uv__free(req->service);
+  else if (req->hostname)
+    uv__free(req->hostname);
+  else
+    assert(0);
+
+  req->hints = NULL;
+  req->service = NULL;
+  req->hostname = NULL;
+
+  if (status == UV_ECANCELED) {
+    assert(req->retcode == 0);
+    req->retcode = UV_EAI_CANCELED;
+  }
+
+  if (req->cb)
+    req->cb(req, req->retcode, req->addrinfo);
+}
+
+
+int uv_getaddrinfo(uv_loop_t* loop,
+                   uv_getaddrinfo_t* req,
+                   uv_getaddrinfo_cb cb,
+                   const char* hostname,
+                   const char* service,
+                   const struct addrinfo* hints) {
+  char hostname_ascii[256];
+  size_t hostname_len;
+  size_t service_len;
+  size_t hints_len;
+  size_t len;
+  char* buf;
+  long rc;
+
+  if (req == NULL || (hostname == NULL && service == NULL))
+    return UV_EINVAL;
+
+  /* FIXME(bnoordhuis) IDNA does not seem to work z/OS,
+   * probably because it uses EBCDIC rather than ASCII.
+   */
+#ifdef __MVS__
+  (void) &hostname_ascii;
+#else
+  if (hostname != NULL) {
+    rc = uv__idna_toascii(hostname,
+                          hostname + strlen(hostname),
+                          hostname_ascii,
+                          hostname_ascii + sizeof(hostname_ascii));
+    if (rc < 0)
+      return rc;
+    hostname = hostname_ascii;
+  }
+#endif
+
+  hostname_len = hostname ? strlen(hostname) + 1 : 0;
+  service_len = service ? strlen(service) + 1 : 0;
+  hints_len = hints ? sizeof(*hints) : 0;
+  buf = uv__malloc(hostname_len + service_len + hints_len);
+
+  if (buf == NULL)
+    return UV_ENOMEM;
+
+  uv__req_init(loop, req, UV_GETADDRINFO);
+  req->loop = loop;
+  req->cb = cb;
+  req->addrinfo = NULL;
+  req->hints = NULL;
+  req->service = NULL;
+  req->hostname = NULL;
+  req->retcode = 0;
+
+  /* order matters, see uv_getaddrinfo_done() */
+  len = 0;
+
+  if (hints) {
+    req->hints = memcpy(buf + len, hints, sizeof(*hints));
+    len += sizeof(*hints);
+  }
+
+  if (service) {
+    req->service = memcpy(buf + len, service, service_len);
+    len += service_len;
+  }
+
+  if (hostname)
+    req->hostname = memcpy(buf + len, hostname, hostname_len);
+
+  if (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;
+  }
+}
+
+
+void uv_freeaddrinfo(struct addrinfo* ai) {
+  if (ai)
+    freeaddrinfo(ai);
+}
+
+
+int uv_if_indextoname(unsigned int ifindex, char* buffer, size_t* size) {
+  char ifname_buf[UV_IF_NAMESIZE];
+  size_t len;
+
+  if (buffer == NULL || size == NULL || *size == 0)
+    return UV_EINVAL;
+
+  if (if_indextoname(ifindex, ifname_buf) == NULL)
+    return UV__ERR(errno);
+
+  len = strnlen(ifname_buf, sizeof(ifname_buf));
+
+  if (*size <= len) {
+    *size = len + 1;
+    return UV_ENOBUFS;
+  }
+
+  memcpy(buffer, ifname_buf, len);
+  buffer[len] = '\0';
+  *size = len;
+
+  return 0;
+}
+
+int uv_if_indextoiid(unsigned int ifindex, char* buffer, size_t* size) {
+  return uv_if_indextoname(ifindex, buffer, size);
+}