. /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   58 make_socket_pair(io_context& ctx) 45   58 make_socket_pair(io_context& ctx)
46   { 46   {
HITCBC 47   58 auto ex = ctx.get_executor(); 47   58 auto ex = ctx.get_executor();
48   48  
HITCBC 49   58 std::error_code accept_ec; 49   58 std::error_code accept_ec;
HITCBC 50   58 std::error_code connect_ec; 50   58 std::error_code connect_ec;
HITCBC 51   58 bool accept_done = false; 51   58 bool accept_done = false;
HITCBC 52   58 bool connect_done = false; 52   58 bool connect_done = false;
53   53  
HITCBC 54   58 Acceptor acc(ctx); 54   58 Acceptor acc(ctx);
HITCBC 55   58 acc.open(); 55   58 acc.open();
HITCBC 56   58 acc.set_option(socket_option::reuse_address(true)); 56   58 acc.set_option(socket_option::reuse_address(true));
HITCBC 57   58 if (auto ec = acc.bind(endpoint(ipv4_address::loopback(), 0))) 57   58 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   58 if (auto ec = acc.listen()) 59   58 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   58 auto port = acc.local_endpoint().port(); 61   58 auto port = acc.local_endpoint().port();
62   62  
HITCBC 63   58 Socket s1(ctx); 63   58 Socket s1(ctx);
HITCBC 64   58 Socket s2(ctx); 64   58 Socket s2(ctx);
HITCBC 65   58 s2.open(); 65   58 s2.open();
66   66  
HITCBC 67   58 capy::run_async(ex)( 67   58 capy::run_async(ex)(
HITCBC 68   116 [](Acceptor& a, Socket& s, std::error_code& ec_out, 68   116 [](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   58 capy::run_async(ex)( 75   58 capy::run_async(ex)(
HITCBC 76   116 [](Socket& s, endpoint ep, std::error_code& ec_out, 76   116 [](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   58 ctx.run(); 84   58 ctx.run();
HITCBC 85   58 ctx.restart(); 85   58 ctx.restart();
86   86  
HITCBC 87   58 if (!accept_done || accept_ec) 87   58 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   58 if (!connect_done || connect_ec) 96   58 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   58 acc.close(); 106   58 acc.close();
107   107  
108   if constexpr (Linger) 108   if constexpr (Linger)
109   { 109   {
HITCBC 110   4 s1.set_option(socket_option::linger(true, 0)); 110   4 s1.set_option(socket_option::linger(true, 0));
HITCBC 111   4 s2.set_option(socket_option::linger(true, 0)); 111   4 s2.set_option(socket_option::linger(true, 0));
112   } 112   }
113   113  
HITCBC 114   116 return {std::move(s1), std::move(s2)}; 114   116 return {std::move(s1), std::move(s2)};
HITCBC 115   58 } 115   58 }
116   116  
117   } // namespace boost::corosio::test 117   } // namespace boost::corosio::test
118   118  
119   #endif 119   #endif