--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-tcp-bind-error.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,317 @@
+/* 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>
+
+
+static int connect_cb_called = 0;
+static int close_cb_called = 0;
+
+
+static void close_cb(uv_handle_t* handle) {
+  ASSERT_NOT_NULL(handle);
+  close_cb_called++;
+}
+
+
+static void connect_cb(uv_connect_t* req, int status) {
+  ASSERT_EQ(status, UV_EADDRINUSE);
+  uv_close((uv_handle_t*) req->handle, close_cb);
+  connect_cb_called++;
+}
+
+
+TEST_IMPL(tcp_bind_error_addrinuse_connect) {
+  struct sockaddr_in addr;
+  int addrlen;
+  uv_connect_t req;
+  uv_tcp_t conn;
+
+  /* 127.0.0.1:<TEST_PORT> is already taken by tcp4_echo_server running in
+   * another process. uv_tcp_bind() and uv_tcp_connect() should still succeed
+   * (greatest common denominator across platforms) but the connect callback
+   * should receive an UV_EADDRINUSE error.
+   */
+  ASSERT_OK(uv_tcp_init(uv_default_loop(), &conn));
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+  ASSERT_OK(uv_tcp_bind(&conn, (const struct sockaddr*) &addr, 0));
+
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT + 1, &addr));
+  ASSERT_OK(uv_tcp_connect(&req,
+                           &conn,
+                           (const struct sockaddr*) &addr,
+                           connect_cb));
+
+  addrlen = sizeof(addr);
+  ASSERT_EQ(UV_EADDRINUSE, uv_tcp_getsockname(&conn,
+                                              (struct sockaddr*) &addr,
+                                              &addrlen));
+
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+  ASSERT_EQ(1, connect_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_error_addrinuse_listen) {
+  struct sockaddr_in addr;
+  uv_tcp_t server1, server2;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+  r = uv_tcp_init(uv_default_loop(), &server1);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server1, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_tcp_init(uv_default_loop(), &server2);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server2, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_listen((uv_stream_t*)&server1, 128, NULL);
+  ASSERT_OK(r);
+  r = uv_listen((uv_stream_t*)&server2, 128, NULL);
+  ASSERT_EQ(r, UV_EADDRINUSE);
+
+  uv_close((uv_handle_t*)&server1, close_cb);
+  uv_close((uv_handle_t*)&server2, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(2, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_error_addrnotavail_1) {
+  struct sockaddr_in addr;
+  uv_tcp_t server;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("127.255.255.255", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+
+  /* It seems that Linux is broken here - bind succeeds. */
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT(r == 0 || r == UV_EADDRNOTAVAIL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_error_addrnotavail_2) {
+  struct sockaddr_in addr;
+  uv_tcp_t server;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("4.4.4.4", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT_EQ(r, UV_EADDRNOTAVAIL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_error_fault) {
+  char garbage[] =
+      "blah blah blah blah blah blah blah blah blah blah blah blah";
+  struct sockaddr_in* garbage_addr;
+  uv_tcp_t server;
+  int r;
+
+  garbage_addr = (struct sockaddr_in*) &garbage;
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) garbage_addr, 0);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+/* Notes: On Linux uv_bind(server, NULL) will segfault the program.  */
+
+TEST_IMPL(tcp_bind_error_inval) {
+  struct sockaddr_in addr1;
+  struct sockaddr_in addr2;
+  uv_tcp_t server;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr1));
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT_2, &addr2));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr1, 0);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr2, 0);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_localhost_ok) {
+  struct sockaddr_in addr;
+  uv_tcp_t server;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_invalid_flags) {
+  struct sockaddr_in addr;
+  uv_tcp_t server;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, UV_TCP_IPV6ONLY);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_listen_without_bind) {
+  int r;
+  uv_tcp_t server;
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_listen((uv_stream_t*)&server, 128, NULL);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind_writable_flags) {
+  struct sockaddr_in addr;
+  uv_tcp_t server;
+  uv_buf_t buf;
+  uv_write_t write_req;
+  uv_shutdown_t shutdown_req;
+  int r;
+
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+  r = uv_listen((uv_stream_t*)&server, 128, NULL);
+  ASSERT_OK(r);
+
+  ASSERT_OK(uv_is_writable((uv_stream_t*) &server));
+  ASSERT_OK(uv_is_readable((uv_stream_t*) &server));
+
+  buf = uv_buf_init("PING", 4);
+  r = uv_write(&write_req, (uv_stream_t*) &server, &buf, 1, NULL);
+  ASSERT_EQ(r, UV_EPIPE);
+  r = uv_shutdown(&shutdown_req, (uv_stream_t*) &server, NULL);
+  ASSERT_EQ(r, UV_ENOTCONN);
+  r = uv_read_start((uv_stream_t*) &server,
+                    (uv_alloc_cb) abort,
+                    (uv_read_cb) abort);
+  ASSERT_EQ(r, UV_ENOTCONN);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+TEST_IMPL(tcp_bind_or_listen_error_after_close) {
+  uv_tcp_t tcp;
+  struct sockaddr_in addr;
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  addr.sin_port = htons(9999);
+  addr.sin_family = AF_INET;
+
+  ASSERT_OK(uv_tcp_init(uv_default_loop(), &tcp));
+  uv_close((uv_handle_t*) &tcp, NULL);
+  ASSERT_EQ(uv_tcp_bind(&tcp, (struct sockaddr*) &addr, 0), UV_EINVAL);
+  ASSERT_EQ(uv_listen((uv_stream_t*) &tcp, 5, NULL), UV_EINVAL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}