--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-udp-options.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,160 @@
+/* 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 "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static int udp_options_test(const struct sockaddr* addr) {
+  static int invalid_ttls[] = { -1, 0, 256 };
+  uv_loop_t* loop;
+  uv_udp_t h;
+  int i, r;
+
+  loop = uv_default_loop();
+
+  r = uv_udp_init(loop, &h);
+  ASSERT_OK(r);
+
+  uv_unref((uv_handle_t*)&h); /* don't keep the loop alive */
+
+  r = uv_udp_bind(&h, addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_udp_set_broadcast(&h, 1);
+  r |= uv_udp_set_broadcast(&h, 1);
+  r |= uv_udp_set_broadcast(&h, 0);
+  r |= uv_udp_set_broadcast(&h, 0);
+  ASSERT_OK(r);
+
+  /* values 1-255 should work */
+  for (i = 1; i <= 255; i++) {
+    r = uv_udp_set_ttl(&h, i);
+#if defined(__MVS__)
+    if (addr->sa_family == AF_INET6)
+      ASSERT_OK(r);
+    else
+      ASSERT_EQ(r, UV_ENOTSUP);
+#else
+    ASSERT_OK(r);
+#endif
+  }
+
+  for (i = 0; i < (int) ARRAY_SIZE(invalid_ttls); i++) {
+    r = uv_udp_set_ttl(&h, invalid_ttls[i]);
+    ASSERT_EQ(r, UV_EINVAL);
+  }
+
+  r = uv_udp_set_multicast_loop(&h, 1);
+  r |= uv_udp_set_multicast_loop(&h, 1);
+  r |= uv_udp_set_multicast_loop(&h, 0);
+  r |= uv_udp_set_multicast_loop(&h, 0);
+  ASSERT_OK(r);
+
+  /* values 0-255 should work */
+  for (i = 0; i <= 255; i++) {
+    r = uv_udp_set_multicast_ttl(&h, i);
+    ASSERT_OK(r);
+  }
+
+  /* anything >255 should fail */
+  r = uv_udp_set_multicast_ttl(&h, 256);
+  ASSERT_EQ(r, UV_EINVAL);
+  /* don't test ttl=-1, it's a valid value on some platforms */
+
+  r = uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}
+
+
+TEST_IMPL(udp_options) {
+  struct sockaddr_in addr;
+
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+  return udp_options_test((const struct sockaddr*) &addr);
+}
+
+
+TEST_IMPL(udp_options6) {
+  struct sockaddr_in6 addr;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  ASSERT_OK(uv_ip6_addr("::", TEST_PORT, &addr));
+  return udp_options_test((const struct sockaddr*) &addr);
+}
+
+
+TEST_IMPL(udp_no_autobind) {
+  uv_loop_t* loop;
+  uv_udp_t h;
+  uv_udp_t h2;
+
+  loop = uv_default_loop();
+
+  /* Test a lazy initialized socket. */
+  ASSERT_OK(uv_udp_init(loop, &h));
+  ASSERT_EQ(UV_EBADF, uv_udp_set_multicast_ttl(&h, 32));
+  ASSERT_EQ(UV_EBADF, uv_udp_set_broadcast(&h, 1));
+#if defined(__MVS__)
+  ASSERT_EQ(UV_ENOTSUP, uv_udp_set_ttl(&h, 1));
+#else
+  ASSERT_EQ(UV_EBADF, uv_udp_set_ttl(&h, 1));
+#endif
+  ASSERT_EQ(UV_EBADF, uv_udp_set_multicast_loop(&h, 1));
+/* TODO(gengjiawen): Fix test on QEMU. */
+#if defined(__QEMU__)
+  RETURN_SKIP("Test does not currently work in QEMU");
+#endif
+  ASSERT_EQ(UV_EBADF, uv_udp_set_multicast_interface(&h, "0.0.0.0"));
+
+  uv_close((uv_handle_t*) &h, NULL);
+
+  /* Test a non-lazily initialized socket. */
+  ASSERT_OK(uv_udp_init_ex(loop, &h2, AF_INET | UV_UDP_RECVMMSG));
+  ASSERT_OK(uv_udp_set_multicast_ttl(&h2, 32));
+  ASSERT_OK(uv_udp_set_broadcast(&h2, 1));
+
+#if defined(__MVS__)
+  /* zOS only supports setting ttl for IPv6 sockets. */
+  ASSERT_EQ(UV_ENOTSUP, uv_udp_set_ttl(&h2, 1));
+#else
+  ASSERT_OK(uv_udp_set_ttl(&h2, 1));
+#endif
+
+  ASSERT_OK(uv_udp_set_multicast_loop(&h2, 1));
+  ASSERT_OK(uv_udp_set_multicast_interface(&h2, "0.0.0.0"));
+
+  uv_close((uv_handle_t*) &h2, NULL);
+
+  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}