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diff --git a/3rdparty/asio/src/tests/unit/ip/unicast.cpp b/3rdparty/asio/src/tests/unit/ip/unicast.cpp
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+//
+// unicast.cpp
+// ~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+// Disable autolinking for unit tests.
+#if !defined(BOOST_ALL_NO_LIB)
+#define BOOST_ALL_NO_LIB 1
+#endif // !defined(BOOST_ALL_NO_LIB)
+
+// Test that header file is self-contained.
+#include "asio/ip/unicast.hpp"
+
+#include "asio/io_context.hpp"
+#include "asio/ip/udp.hpp"
+#include "../unit_test.hpp"
+
+//------------------------------------------------------------------------------
+
+// ip_unicast_compile test
+// ~~~~~~~~~~~~~~~~~~~~~~~
+// The following test checks that all nested classes, enums and constants in
+// ip::unicast compile and link correctly. Runtime failures are ignored.
+
+namespace ip_unicast_compile {
+
+void test()
+{
+ using namespace asio;
+ namespace ip = asio::ip;
+
+ try
+ {
+ io_context ioc;
+ ip::udp::socket sock(ioc);
+
+ // hops class.
+
+ ip::unicast::hops hops1(1024);
+ sock.set_option(hops1);
+ ip::unicast::hops hops2;
+ sock.get_option(hops2);
+ hops1 = 1;
+ (void)static_cast<int>(hops1.value());
+ }
+ catch (std::exception&)
+ {
+ }
+}
+
+} // namespace ip_unicast_compile
+
+//------------------------------------------------------------------------------
+
+// ip_unicast_runtime test
+// ~~~~~~~~~~~~~~~~~~~~~~~
+// The following test checks the runtime operation of the socket options defined
+// in the ip::unicast namespace.
+
+namespace ip_unicast_runtime {
+
+void test()
+{
+ using namespace asio;
+ namespace ip = asio::ip;
+
+ io_context ioc;
+ asio::error_code ec;
+
+ ip::udp::endpoint ep_v4(ip::address_v4::loopback(), 0);
+ ip::udp::socket sock_v4(ioc);
+ sock_v4.open(ep_v4.protocol(), ec);
+ sock_v4.bind(ep_v4, ec);
+ bool have_v4 = !ec;
+
+ ip::udp::endpoint ep_v6(ip::address_v6::loopback(), 0);
+ ip::udp::socket sock_v6(ioc);
+ sock_v6.open(ep_v6.protocol(), ec);
+ sock_v6.bind(ep_v6, ec);
+ bool have_v6 = !ec;
+
+ ASIO_CHECK(have_v4 || have_v6);
+
+ // hops class.
+
+ if (have_v4)
+ {
+ ip::unicast::hops hops1(1);
+ ASIO_CHECK(hops1.value() == 1);
+ sock_v4.set_option(hops1, ec);
+#if defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ // Option is not supported under Windows CE.
+ ASIO_CHECK_MESSAGE(ec == asio::error::no_protocol_option,
+ ec.value() << ", " << ec.message());
+#else // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ ASIO_CHECK(!ec);
+#endif // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+
+ ip::unicast::hops hops2;
+ sock_v4.get_option(hops2, ec);
+#if defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ // Option is not supported under Windows CE.
+ ASIO_CHECK_MESSAGE(ec == asio::error::no_protocol_option,
+ ec.value() << ", " << ec.message());
+#else // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ ASIO_CHECK(!ec);
+ ASIO_CHECK(hops2.value() == 1);
+#endif // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+
+ ip::unicast::hops hops3(255);
+ ASIO_CHECK(hops3.value() == 255);
+ sock_v4.set_option(hops3, ec);
+#if defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ // Option is not supported under Windows CE.
+ ASIO_CHECK_MESSAGE(ec == asio::error::no_protocol_option,
+ ec.value() << ", " << ec.message());
+#else // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ ASIO_CHECK(!ec);
+#endif // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+
+ ip::unicast::hops hops4;
+ sock_v4.get_option(hops4, ec);
+#if defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ // Option is not supported under Windows CE.
+ ASIO_CHECK_MESSAGE(ec == asio::error::no_protocol_option,
+ ec.value() << ", " << ec.message());
+#else // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ ASIO_CHECK(!ec);
+ ASIO_CHECK(hops4.value() == 255);
+#endif // defined(ASIO_WINDOWS) && defined(UNDER_CE)
+ }
+
+ if (have_v6)
+ {
+ ip::unicast::hops hops1(1);
+ ASIO_CHECK(hops1.value() == 1);
+ sock_v6.set_option(hops1, ec);
+ ASIO_CHECK(!ec);
+
+ ip::unicast::hops hops2;
+ sock_v6.get_option(hops2, ec);
+ ASIO_CHECK(!ec);
+ ASIO_CHECK(hops2.value() == 1);
+
+ ip::unicast::hops hops3(255);
+ ASIO_CHECK(hops3.value() == 255);
+ sock_v6.set_option(hops3, ec);
+ ASIO_CHECK(!ec);
+
+ ip::unicast::hops hops4;
+ sock_v6.get_option(hops4, ec);
+ ASIO_CHECK(!ec);
+ ASIO_CHECK(hops4.value() == 255);
+ }
+}
+
+} // namespace ip_unicast_runtime
+
+//------------------------------------------------------------------------------
+
+ASIO_TEST_SUITE
+(
+ "ip/unicast",
+ ASIO_TEST_CASE(ip_unicast_compile::test)
+ ASIO_TEST_CASE(ip_unicast_runtime::test)
+)