. /include/boost/corosio /test /socket_pair.hpp
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1   // 1   //
2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) 2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com)
3   // Copyright (c) 2026 Steve Gerbino 3   // Copyright (c) 2026 Steve Gerbino
4   // 4   //
5   // Distributed under the Boost Software License, Version 1.0. (See accompanying 5   // Distributed under the Boost Software License, Version 1.0. (See accompanying
6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7   // 7   //
8   // Official repository: https://github.com/cppalliance/corosio 8   // Official repository: https://github.com/cppalliance/corosio
9   // 9   //
10   10  
11   #ifndef BOOST_COROSIO_TEST_SOCKET_PAIR_HPP 11   #ifndef BOOST_COROSIO_TEST_SOCKET_PAIR_HPP
12   #define BOOST_COROSIO_TEST_SOCKET_PAIR_HPP 12   #define BOOST_COROSIO_TEST_SOCKET_PAIR_HPP
13   13  
14   #include <boost/corosio/io_context.hpp> 14   #include <boost/corosio/io_context.hpp>
15   #include <boost/corosio/tcp_acceptor.hpp> 15   #include <boost/corosio/tcp_acceptor.hpp>
16   #include <boost/corosio/tcp_socket.hpp> 16   #include <boost/corosio/tcp_socket.hpp>
17   #include <boost/corosio/socket_option.hpp> 17   #include <boost/corosio/socket_option.hpp>
18   #include <boost/capy/ex/run_async.hpp> 18   #include <boost/capy/ex/run_async.hpp>
19   #include <boost/capy/task.hpp> 19   #include <boost/capy/task.hpp>
20   20  
21   #include <cstdio> 21   #include <cstdio>
22   #include <stdexcept> 22   #include <stdexcept>
23   #include <system_error> 23   #include <system_error>
24   #include <utility> 24   #include <utility>
25   25  
26   namespace boost::corosio::test { 26   namespace boost::corosio::test {
27   27  
28   /** Create a connected pair of sockets. 28   /** Create a connected pair of sockets.
29   29  
30   Creates two sockets connected via loopback TCP sockets. 30   Creates two sockets connected via loopback TCP sockets.
31   Data written to one socket can be read from the other. 31   Data written to one socket can be read from the other.
32   32  
33   @tparam Socket The socket type (default `tcp_socket`). 33   @tparam Socket The socket type (default `tcp_socket`).
34   @tparam Acceptor The acceptor type (default `tcp_acceptor`). 34   @tparam Acceptor The acceptor type (default `tcp_acceptor`).
35   35  
36   @param ctx The I/O context for the sockets. 36   @param ctx The I/O context for the sockets.
37   37  
38   @return A pair of connected sockets. 38   @return A pair of connected sockets.
39   */ 39   */
40   template< 40   template<
41   class Socket = tcp_socket, 41   class Socket = tcp_socket,
42   class Acceptor = tcp_acceptor, 42   class Acceptor = tcp_acceptor,
43   bool Linger = true> 43   bool Linger = true>
44   std::pair<Socket, Socket> 44   std::pair<Socket, Socket>
HITCBC 45   155 make_socket_pair(io_context& ctx) 45   161 make_socket_pair(io_context& ctx)
46   { 46   {
HITCBC 47   155 auto ex = ctx.get_executor(); 47   161 auto ex = ctx.get_executor();
48   48  
HITCBC 49   155 std::error_code accept_ec; 49   161 std::error_code accept_ec;
HITCBC 50   155 std::error_code connect_ec; 50   161 std::error_code connect_ec;
HITCBC 51   155 bool accept_done = false; 51   161 bool accept_done = false;
HITCBC 52   155 bool connect_done = false; 52   161 bool connect_done = false;
53   53  
HITCBC 54   155 Acceptor acc(ctx); 54   161 Acceptor acc(ctx);
HITCBC 55   155 acc.open(); 55   161 acc.open();
HITCBC 56   155 acc.set_option(socket_option::reuse_address(true)); 56   161 acc.set_option(socket_option::reuse_address(true));
HITCBC 57   155 if (auto ec = acc.bind(endpoint(ipv4_address::loopback(), 0))) 57   161 if (auto ec = acc.bind(endpoint(ipv4_address::loopback(), 0)))
MISUBC 58   ✗ throw std::runtime_error("socket_pair bind failed: " + ec.message()); 58   ✗ throw std::runtime_error("socket_pair bind failed: " + ec.message());
HITCBC 59   155 if (auto ec = acc.listen()) 59   161 if (auto ec = acc.listen())
MISUBC 60   ✗ throw std::runtime_error("socket_pair listen failed: " + ec.message()); 60   ✗ throw std::runtime_error("socket_pair listen failed: " + ec.message());
HITCBC 61   155 auto port = acc.local_endpoint().port(); 61   161 auto port = acc.local_endpoint().port();
62   62  
HITCBC 63   155 Socket s1(ctx); 63   161 Socket s1(ctx);
HITCBC 64   155 Socket s2(ctx); 64   161 Socket s2(ctx);
HITCBC 65   155 s2.open(); 65   161 s2.open();
66   66  
HITCBC 67   155 capy::run_async(ex)( 67   161 capy::run_async(ex)(
HITCBC 68   310 [](Acceptor& a, Socket& s, std::error_code& ec_out, 68   322 [](Acceptor& a, Socket& s, std::error_code& ec_out,
69   bool& done_out) -> capy::task<> { 69   bool& done_out) -> capy::task<> {
70   auto [ec] = co_await a.accept(s); 70   auto [ec] = co_await a.accept(s);
71   ec_out = ec; 71   ec_out = ec;
72   done_out = true; 72   done_out = true;
73   }(acc, s1, accept_ec, accept_done)); 73   }(acc, s1, accept_ec, accept_done));
74   74  
HITCBC 75   155 capy::run_async(ex)( 75   161 capy::run_async(ex)(
HITCBC 76   310 [](Socket& s, endpoint ep, std::error_code& ec_out, 76   322 [](Socket& s, endpoint ep, std::error_code& ec_out,
77   bool& done_out) -> capy::task<> { 77   bool& done_out) -> capy::task<> {
78   auto [ec] = co_await s.connect(ep); 78   auto [ec] = co_await s.connect(ep);
79   ec_out = ec; 79   ec_out = ec;
80   done_out = true; 80   done_out = true;
81   }(s2, endpoint(ipv4_address::loopback(), port), connect_ec, 81   }(s2, endpoint(ipv4_address::loopback(), port), connect_ec,
82   connect_done)); 82   connect_done));
83   83  
HITCBC 84   155 ctx.run(); 84   161 ctx.run();
HITCBC 85   155 ctx.restart(); 85   161 ctx.restart();
86   86  
HITCBC 87   155 if (!accept_done || accept_ec) 87   161 if (!accept_done || accept_ec)
88   { 88   {
MISUBC 89   ✗ std::fprintf( 89   ✗ std::fprintf(
90   stderr, "socket_pair: accept failed (done=%d, ec=%s)\n", 90   stderr, "socket_pair: accept failed (done=%d, ec=%s)\n",
91   accept_done, accept_ec.message().c_str()); 91   accept_done, accept_ec.message().c_str());
MISUBC 92   ✗ acc.close(); 92   ✗ acc.close();
MISUBC 93   ✗ throw std::runtime_error("socket_pair accept failed"); 93   ✗ throw std::runtime_error("socket_pair accept failed");
94   } 94   }
95   95  
HITCBC 96   155 if (!connect_done || connect_ec) 96   161 if (!connect_done || connect_ec)
97   { 97   {
MISUBC 98   ✗ std::fprintf( 98   ✗ std::fprintf(
99   stderr, "socket_pair: connect failed (done=%d, ec=%s)\n", 99   stderr, "socket_pair: connect failed (done=%d, ec=%s)\n",
100   connect_done, connect_ec.message().c_str()); 100   connect_done, connect_ec.message().c_str());
MISUBC 101   ✗ acc.close(); 101   ✗ acc.close();
MISUBC 102   ✗ s1.close(); 102   ✗ s1.close();
MISUBC 103   ✗ throw std::runtime_error("socket_pair connect failed"); 103   ✗ throw std::runtime_error("socket_pair connect failed");
104   } 104   }
105   105  
HITCBC 106   155 acc.close(); 106   161 acc.close();
107   107  
108   if constexpr (Linger) 108   if constexpr (Linger)
109   { 109   {
HITCBC 110   70 s1.set_option(socket_option::linger(true, 0)); 110   70 s1.set_option(socket_option::linger(true, 0));
HITCBC 111   70 s2.set_option(socket_option::linger(true, 0)); 111   70 s2.set_option(socket_option::linger(true, 0));
112   } 112   }
113   113  
HITCBC 114   310 return {std::move(s1), std::move(s2)}; 114   322 return {std::move(s1), std::move(s2)};
HITCBC 115   155 } 115   161 }
116   116  
117   } // namespace boost::corosio::test 117   } // namespace boost::corosio::test
118   118  
119   #endif 119   #endif