22587161270

Committed 02 Mar 2026 05:15PM UTC coverage: 90.32% (-0.001%) from 90.321%

Build # 22587161270

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Pull #5399

github

Committed by

web-flow

Commit Message

Merge 11695c8f6 into fac269140

Pull Request Pull Request #5399: Use RAII for addrinfo lifetime management

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85.71

/src/lib/utils/socket/socket.cpp

/*
* (C) 2015,2016,2017 Jack Lloyd
* (C) 2016 Daniel Neus
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/socket.h>

#include <botan/exceptn.h>
#include <botan/mem_ops.h>
#include <botan/internal/fmt.h>
#include <botan/internal/stl_util.h>
#include <botan/internal/target_info.h>
#include <chrono>

#if defined(BOTAN_HAS_BOOST_ASIO)
   /*
  * We don't need serial port support anyway, and asking for it causes
  * macro conflicts with termios.h when this file is included in the
  * amalgamation.
  */
   #define BOOST_ASIO_DISABLE_SERIAL_PORT
   #include <boost/asio.hpp>
   #include <boost/asio/system_timer.hpp>

#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS)
   #include <errno.h>
   #include <fcntl.h>
   #include <netdb.h>
   #include <netinet/in.h>
   #include <string.h>
   #include <sys/socket.h>
   #include <sys/time.h>
   #include <unistd.h>

#elif defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
   #include <ws2tcpip.h>
#endif

namespace Botan {

namespace {

#if defined(BOTAN_HAS_BOOST_ASIO)

class Asio_Socket final : public OS::Socket {
   public:
      Asio_Socket(std::string_view hostname, std::string_view service, std::chrono::milliseconds timeout) :
            m_timeout(timeout), m_timer(m_io), m_tcp(m_io) {
         m_timer.expires_after(m_timeout);
         check_timeout();

         boost::asio::ip::tcp::resolver resolver(m_io);
         const boost::asio::ip::tcp::resolver::results_type dns_iter =
            resolver.resolve(std::string{hostname}, std::string{service});

         boost::system::error_code ec = boost::asio::error::would_block;

         auto connect_cb = [&ec](const boost::system::error_code& e, const auto&) { ec = e; };

         boost::asio::async_connect(m_tcp, dns_iter.begin(), dns_iter.end(), connect_cb);

         while(ec == boost::asio::error::would_block) {
            m_io.run_one();
         }

         if(ec) {
            throw boost::system::system_error(ec);
         }
         if(!m_tcp.is_open()) {
            throw System_Error(fmt("Connection to host {} failed", hostname));
         }
      }

      void write(std::span<const uint8_t> buf) override {
         m_timer.expires_after(m_timeout);

         boost::system::error_code ec = boost::asio::error::would_block;

         // Some versions of asio don't know about span...
         m_tcp.async_send(boost::asio::buffer(buf.data(), buf.size()),
                          [&ec](boost::system::error_code e, size_t) { ec = e; });

         while(ec == boost::asio::error::would_block) {
            m_io.run_one();
         }

         if(ec) {
            throw boost::system::system_error(ec);
         }
      }

      size_t read(uint8_t buf[], size_t len) override {
         m_timer.expires_after(m_timeout);

         boost::system::error_code ec = boost::asio::error::would_block;
         size_t got = 0;

         m_tcp.async_read_some(boost::asio::buffer(buf, len), [&](boost::system::error_code cb_ec, size_t cb_got) {
            ec = cb_ec;
            got = cb_got;
         });

         while(ec == boost::asio::error::would_block) {
            m_io.run_one();
         }

         if(ec) {
            if(ec == boost::asio::error::eof) {
               return 0;
            }
            throw boost::system::system_error(ec);  // Some other error.
         }

         return got;
      }

   private:
      void check_timeout() {
         if(m_tcp.is_open() && m_timer.expiry() < std::chrono::system_clock::now()) {
            boost::system::error_code err;

            // NOLINTNEXTLINE(bugprone-unused-return-value,cert-err33-c)
            m_tcp.close(err);
         }

         // NOLINTNEXTLINE(*-avoid-bind) FIXME - unclear why we can't use a lambda here
         m_timer.async_wait(std::bind(&Asio_Socket::check_timeout, this));
      }

      const std::chrono::milliseconds m_timeout;
      boost::asio::io_context m_io;
      boost::asio::system_timer m_timer;
      boost::asio::ip::tcp::socket m_tcp;
};

#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) || defined(BOTAN_TARGET_OS_HAS_WINSOCK2)

class BSD_Socket final : public OS::Socket {
   private:
   #if defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
      typedef SOCKET socket_type;
      typedef int socket_op_ret_type;
      typedef int socklen_type;
      typedef int sendrecv_len_type;

      static socket_type invalid_socket() { return INVALID_SOCKET; }

      static void close_socket(socket_type s) { ::closesocket(s); }

      static std::string get_last_socket_error() { return std::to_string(::WSAGetLastError()); }

      static bool nonblocking_connect_in_progress() { return (::WSAGetLastError() == WSAEWOULDBLOCK); }

      static void set_nonblocking(socket_type s) {
         u_long nonblocking = 1;
         ::ioctlsocket(s, FIONBIO, &nonblocking);
      }

      static void socket_init() {
         WSAData wsa_data;
         WORD wsa_version = MAKEWORD(2, 2);

         if(::WSAStartup(wsa_version, &wsa_data) != 0) {
            throw System_Error("WSAStartup() failed", WSAGetLastError());
         }

         if(LOBYTE(wsa_data.wVersion) != 2 || HIBYTE(wsa_data.wVersion) != 2) {
            ::WSACleanup();
            throw System_Error("Could not find a usable version of Winsock.dll");
         }
      }

      static void socket_fini() { ::WSACleanup(); }
   #else
      typedef int socket_type;
      typedef ssize_t socket_op_ret_type;
      typedef socklen_t socklen_type;
      typedef size_t sendrecv_len_type;

      static socket_type invalid_socket() { return -1; }

      static void close_socket(socket_type s) { ::close(s); }

      static std::string get_last_socket_error() { return ::strerror(errno); }

      static bool nonblocking_connect_in_progress() { return (errno == EINPROGRESS); }

      static void set_nonblocking(socket_type s) {
         // NOLINTNEXTLINE(*-vararg)
         if(::fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
            throw System_Error("Setting socket to non-blocking state failed", errno);
         }
      }

      static void socket_init() {}

      static void socket_fini() {}
   #endif

   public:
      BSD_Socket(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :
            m_timeout(timeout), m_socket(invalid_socket()) {
         socket_init();

         const std::string hostname_str(hostname);
         const std::string service_str(service);

         addrinfo hints{};
         hints.ai_family = AF_UNSPEC;
         hints.ai_socktype = SOCK_STREAM;

         unique_addr_info_ptr res = nullptr;

         const int rc = ::getaddrinfo(hostname_str.c_str(), service_str.c_str(), &hints, Botan::out_ptr(res));
         if(rc != 0) {
            throw System_Error(fmt("Name resolution failed for {}", hostname), rc);
         }

         for(const addrinfo* rp = res.get(); (m_socket == invalid_socket()) && (rp != nullptr); rp = rp->ai_next) {
            if(rp->ai_family != AF_INET && rp->ai_family != AF_INET6) {
               continue;
            }

            m_socket = ::socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);

            if(m_socket == invalid_socket()) {
               // unsupported socket type?
               continue;
            }

            set_nonblocking(m_socket);

            const int err = ::connect(m_socket, rp->ai_addr, static_cast<socklen_type>(rp->ai_addrlen));

            if(err == -1) {
               int active = 0;
               if(nonblocking_connect_in_progress()) {
                  struct timeval timeout_tv = make_timeout_tv();
                  fd_set write_set;
                  FD_ZERO(&write_set);
                  FD_SET(m_socket, &write_set);

                  active = ::select(static_cast<int>(m_socket + 1), nullptr, &write_set, nullptr, &timeout_tv);

                  if(active > 0) {
                     int socket_error = 0;
                     socklen_t len = sizeof(socket_error);

                     if(::getsockopt(m_socket, SOL_SOCKET, SO_ERROR, reinterpret_cast<char*>(&socket_error), &len) <
                        0) {
                        throw System_Error("Error calling getsockopt", errno);
                     }

                     if(socket_error != 0) {
                        active = 0;
                     }
                  }
               }

               if(active == 0) {
                  close_socket(m_socket);
                  m_socket = invalid_socket();
                  continue;
               }
            }
         }

         if(m_socket == invalid_socket()) {
            throw System_Error(fmt("Connecting to {} for service {} failed with errno {}", hostname, service, errno),
                               errno);
         }
      }

      ~BSD_Socket() override {
         close_socket(m_socket);
         m_socket = invalid_socket();
         socket_fini();
      }

      BSD_Socket(const BSD_Socket& other) = delete;
      BSD_Socket(BSD_Socket&& other) = delete;
      BSD_Socket& operator=(const BSD_Socket& other) = delete;
      BSD_Socket& operator=(BSD_Socket&& other) = delete;

      void write(std::span<const uint8_t> buf) override {
         fd_set write_set;
         FD_ZERO(&write_set);
         FD_SET(m_socket, &write_set);

         const size_t len = buf.size();

         size_t sent_so_far = 0;
         while(sent_so_far != len) {
            struct timeval timeout = make_timeout_tv();
            const int active = ::select(static_cast<int>(m_socket + 1), nullptr, &write_set, nullptr, &timeout);

            if(active == 0) {
               throw System_Error("Timeout during socket write");
            }

            const size_t left = len - sent_so_far;
            const socket_op_ret_type sent =
               ::send(m_socket, cast_uint8_ptr_to_char(&buf[sent_so_far]), static_cast<sendrecv_len_type>(left), 0);
            if(sent < 0) {
               throw System_Error("Socket write failed", errno);
            } else {
               sent_so_far += static_cast<size_t>(sent);
            }
         }
      }

      size_t read(uint8_t buf[], size_t len) override {
         fd_set read_set;
         FD_ZERO(&read_set);
         FD_SET(m_socket, &read_set);

         struct timeval timeout = make_timeout_tv();
         const int active = ::select(static_cast<int>(m_socket + 1), &read_set, nullptr, nullptr, &timeout);

         if(active == 0) {
            throw System_Error("Timeout during socket read");
         }

         const socket_op_ret_type got =
            ::recv(m_socket, cast_uint8_ptr_to_char(buf), static_cast<sendrecv_len_type>(len), 0);

         if(got < 0) {
            throw System_Error("Socket read failed", errno);
         }

         return static_cast<size_t>(got);
      }

   private:
      struct timeval make_timeout_tv() const {
         struct timeval tv {};

         tv.tv_sec = static_cast<decltype(timeval::tv_sec)>(m_timeout.count() / 1000000);
         tv.tv_usec = static_cast<decltype(timeval::tv_usec)>(m_timeout.count() % 1000000);
         return tv;
      }

      const std::chrono::microseconds m_timeout;
      socket_type m_socket;

      using unique_addr_info_ptr = std::unique_ptr<addrinfo, decltype([](addrinfo* p) {
                                                      if(p != nullptr) {
                                                         ::freeaddrinfo(p);
                                                      }
                                                   })>;
};

#endif

}  // namespace

std::unique_ptr<OS::Socket> OS::open_socket(std::string_view hostname,
                                            std::string_view service,
                                            std::chrono::milliseconds timeout) {
#if defined(BOTAN_HAS_BOOST_ASIO)
   return std::make_unique<Asio_Socket>(hostname, service, timeout);

#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) || defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
   return std::make_unique<BSD_Socket>(hostname, service, timeout);

#else
   BOTAN_UNUSED(hostname, service, timeout);
   // No sockets for you
   return std::unique_ptr<Socket>();
#endif
}

}  // namespace Botan

1	/*
2	* (C) 2015,2016,2017 Jack Lloyd
3	* (C) 2016 Daniel Neus
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/internal/socket.h>
9
10	#include <botan/exceptn.h>
11	#include <botan/mem_ops.h>
12	#include <botan/internal/fmt.h>
13	#include <botan/internal/stl_util.h>
14	#include <botan/internal/target_info.h>
15	#include <chrono>
16
17	#if defined(BOTAN_HAS_BOOST_ASIO)
18	/*
19	* We don't need serial port support anyway, and asking for it causes
20	* macro conflicts with termios.h when this file is included in the
21	* amalgamation.
22	*/
23	#define BOOST_ASIO_DISABLE_SERIAL_PORT
24	#include <boost/asio.hpp>
25	#include <boost/asio/system_timer.hpp>
26
27	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS)
28	#include <errno.h>
29	#include <fcntl.h>
30	#include <netdb.h>
31	#include <netinet/in.h>
32	#include <string.h>
33	#include <sys/socket.h>
34	#include <sys/time.h>
35	#include <unistd.h>
36
37	#elif defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
38	#include <ws2tcpip.h>
39	#endif
40
41	namespace Botan {
42
43	namespace {
44
45	#if defined(BOTAN_HAS_BOOST_ASIO)
46
47	class Asio_Socket final : public OS::Socket {	×
48	public:
49	Asio_Socket(std::string_view hostname, std::string_view service, std::chrono::milliseconds timeout) :	1✔
50	m_timeout(timeout), m_timer(m_io), m_tcp(m_io) {	2✔
51	m_timer.expires_after(m_timeout);	1✔
52	check_timeout();	1✔
53
54	boost::asio::ip::tcp::resolver resolver(m_io);	1✔
55	const boost::asio::ip::tcp::resolver::results_type dns_iter =	1✔
56	resolver.resolve(std::string{hostname}, std::string{service});	3✔
57
58	boost::system::error_code ec = boost::asio::error::would_block;	1✔
59
60	auto connect_cb = [&ec](const boost::system::error_code& e, const auto&) { ec = e; };	1✔
61
62	boost::asio::async_connect(m_tcp, dns_iter.begin(), dns_iter.end(), connect_cb);	2✔
63
64	while(ec == boost::asio::error::would_block) {	2✔
65	m_io.run_one();	1✔
66	}
67
68	if(ec) {	1✔
69	throw boost::system::system_error(ec);	×
70	}
71	if(!m_tcp.is_open()) {	1✔
72	throw System_Error(fmt("Connection to host {} failed", hostname));	×
73	}
74	}	1✔
75
76	void write(std::span<const uint8_t> buf) override {	1✔
77	m_timer.expires_after(m_timeout);	1✔
78
79	boost::system::error_code ec = boost::asio::error::would_block;	1✔
80
81	// Some versions of asio don't know about span...
82	m_tcp.async_send(boost::asio::buffer(buf.data(), buf.size()),	2✔
83	[&ec](boost::system::error_code e, size_t) { ec = e; });	2✔
84
85	while(ec == boost::asio::error::would_block) {	3✔
86	m_io.run_one();	2✔
87	}
88
89	if(ec) {	1✔
90	throw boost::system::system_error(ec);	×
91	}
92	}	1✔
93
94	size_t read(uint8_t buf[], size_t len) override {	2✔
95	m_timer.expires_after(m_timeout);	2✔
96
97	boost::system::error_code ec = boost::asio::error::would_block;	2✔
98	size_t got = 0;	2✔
99
100	m_tcp.async_read_some(boost::asio::buffer(buf, len), [&](boost::system::error_code cb_ec, size_t cb_got) {	2✔
101	ec = cb_ec;	2✔
102	got = cb_got;	2✔
103	});
104
105	while(ec == boost::asio::error::would_block) {	6✔
106	m_io.run_one();	4✔
107	}
108
109	if(ec) {	2✔
110	if(ec == boost::asio::error::eof) {	1✔
111	return 0;
112	}
113	throw boost::system::system_error(ec); // Some other error.	×
114	}
115
116	return got;	1✔
117	}
118
119	private:
120	void check_timeout() {	4✔
121	if(m_tcp.is_open() && m_timer.expiry() < std::chrono::system_clock::now()) {	4✔
122	boost::system::error_code err;	×
123
124	// NOLINTNEXTLINE(bugprone-unused-return-value,cert-err33-c)
125	m_tcp.close(err);	×
126	}
127
128	// NOLINTNEXTLINE(*-avoid-bind) FIXME - unclear why we can't use a lambda here
129	m_timer.async_wait(std::bind(&Asio_Socket::check_timeout, this));	4✔
130	}	4✔
131
132	const std::chrono::milliseconds m_timeout;
133	boost::asio::io_context m_io;
134	boost::asio::system_timer m_timer;
135	boost::asio::ip::tcp::socket m_tcp;
136	};
137
138	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) \|\| defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
139
140	class BSD_Socket final : public OS::Socket {
141	private:
142	#if defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
143	typedef SOCKET socket_type;
144	typedef int socket_op_ret_type;
145	typedef int socklen_type;
146	typedef int sendrecv_len_type;
147
148	static socket_type invalid_socket() { return INVALID_SOCKET; }
149
150	static void close_socket(socket_type s) { ::closesocket(s); }
151
152	static std::string get_last_socket_error() { return std::to_string(::WSAGetLastError()); }
153
154	static bool nonblocking_connect_in_progress() { return (::WSAGetLastError() == WSAEWOULDBLOCK); }
155
156	static void set_nonblocking(socket_type s) {
157	u_long nonblocking = 1;
158	::ioctlsocket(s, FIONBIO, &nonblocking);
159	}
160
161	static void socket_init() {
162	WSAData wsa_data;
163	WORD wsa_version = MAKEWORD(2, 2);
164
165	if(::WSAStartup(wsa_version, &wsa_data) != 0) {
166	throw System_Error("WSAStartup() failed", WSAGetLastError());
167	}
168
169	if(LOBYTE(wsa_data.wVersion) != 2 \|\| HIBYTE(wsa_data.wVersion) != 2) {
170	::WSACleanup();
171	throw System_Error("Could not find a usable version of Winsock.dll");
172	}
173	}
174
175	static void socket_fini() { ::WSACleanup(); }
176	#else
177	typedef int socket_type;
178	typedef ssize_t socket_op_ret_type;
179	typedef socklen_t socklen_type;
180	typedef size_t sendrecv_len_type;
181
182	static socket_type invalid_socket() { return -1; }
183
184	static void close_socket(socket_type s) { ::close(s); }
185
186	static std::string get_last_socket_error() { return ::strerror(errno); }
187
188	static bool nonblocking_connect_in_progress() { return (errno == EINPROGRESS); }
189
190	static void set_nonblocking(socket_type s) {
191	// NOLINTNEXTLINE(*-vararg)
192	if(::fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
193	throw System_Error("Setting socket to non-blocking state failed", errno);
194	}
195	}
196
197	static void socket_init() {}
198
199	static void socket_fini() {}
200	#endif
201
202	public:
203	BSD_Socket(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :
204	m_timeout(timeout), m_socket(invalid_socket()) {
205	socket_init();
206
207	const std::string hostname_str(hostname);
208	const std::string service_str(service);
209
210	addrinfo hints{};
211	hints.ai_family = AF_UNSPEC;
212	hints.ai_socktype = SOCK_STREAM;
213
214	unique_addr_info_ptr res = nullptr;
215
216	const int rc = ::getaddrinfo(hostname_str.c_str(), service_str.c_str(), &hints, Botan::out_ptr(res));
217	if(rc != 0) {
218	throw System_Error(fmt("Name resolution failed for {}", hostname), rc);
219	}
220
221	for(const addrinfo* rp = res.get(); (m_socket == invalid_socket()) && (rp != nullptr); rp = rp->ai_next) {
222	if(rp->ai_family != AF_INET && rp->ai_family != AF_INET6) {
223	continue;
224	}
225
226	m_socket = ::socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
227
228	if(m_socket == invalid_socket()) {
229	// unsupported socket type?
230	continue;
231	}
232
233	set_nonblocking(m_socket);
234
235	const int err = ::connect(m_socket, rp->ai_addr, static_cast<socklen_type>(rp->ai_addrlen));
236
237	if(err == -1) {
238	int active = 0;
239	if(nonblocking_connect_in_progress()) {
240	struct timeval timeout_tv = make_timeout_tv();
241	fd_set write_set;
242	FD_ZERO(&write_set);
243	FD_SET(m_socket, &write_set);
244
245	active = ::select(static_cast<int>(m_socket + 1), nullptr, &write_set, nullptr, &timeout_tv);
246
247	if(active > 0) {
248	int socket_error = 0;
249	socklen_t len = sizeof(socket_error);
250
251	if(::getsockopt(m_socket, SOL_SOCKET, SO_ERROR, reinterpret_cast<char*>(&socket_error), &len) <
252	0) {
253	throw System_Error("Error calling getsockopt", errno);
254	}
255
256	if(socket_error != 0) {
257	active = 0;
258	}
259	}
260	}
261
262	if(active == 0) {
263	close_socket(m_socket);
264	m_socket = invalid_socket();
265	continue;
266	}
267	}
268	}
269
270	if(m_socket == invalid_socket()) {
271	throw System_Error(fmt("Connecting to {} for service {} failed with errno {}", hostname, service, errno),
272	errno);
273	}
274	}
275
276	~BSD_Socket() override {
277	close_socket(m_socket);
278	m_socket = invalid_socket();
279	socket_fini();
280	}
281
282	BSD_Socket(const BSD_Socket& other) = delete;
283	BSD_Socket(BSD_Socket&& other) = delete;
284	BSD_Socket& operator=(const BSD_Socket& other) = delete;
285	BSD_Socket& operator=(BSD_Socket&& other) = delete;
286
287	void write(std::span<const uint8_t> buf) override {
288	fd_set write_set;
289	FD_ZERO(&write_set);
290	FD_SET(m_socket, &write_set);
291
292	const size_t len = buf.size();
293
294	size_t sent_so_far = 0;
295	while(sent_so_far != len) {
296	struct timeval timeout = make_timeout_tv();
297	const int active = ::select(static_cast<int>(m_socket + 1), nullptr, &write_set, nullptr, &timeout);
298
299	if(active == 0) {
300	throw System_Error("Timeout during socket write");
301	}
302
303	const size_t left = len - sent_so_far;
304	const socket_op_ret_type sent =
305	::send(m_socket, cast_uint8_ptr_to_char(&buf[sent_so_far]), static_cast<sendrecv_len_type>(left), 0);
306	if(sent < 0) {
307	throw System_Error("Socket write failed", errno);
308	} else {
309	sent_so_far += static_cast<size_t>(sent);
310	}
311	}
312	}
313
314	size_t read(uint8_t buf[], size_t len) override {
315	fd_set read_set;
316	FD_ZERO(&read_set);
317	FD_SET(m_socket, &read_set);
318
319	struct timeval timeout = make_timeout_tv();
320	const int active = ::select(static_cast<int>(m_socket + 1), &read_set, nullptr, nullptr, &timeout);
321
322	if(active == 0) {
323	throw System_Error("Timeout during socket read");
324	}
325
326	const socket_op_ret_type got =
327	::recv(m_socket, cast_uint8_ptr_to_char(buf), static_cast<sendrecv_len_type>(len), 0);
328
329	if(got < 0) {
330	throw System_Error("Socket read failed", errno);
331	}
332
333	return static_cast<size_t>(got);
334	}
335
336	private:
337	struct timeval make_timeout_tv() const {
338	struct timeval tv {};
339
340	tv.tv_sec = static_cast<decltype(timeval::tv_sec)>(m_timeout.count() / 1000000);
341	tv.tv_usec = static_cast<decltype(timeval::tv_usec)>(m_timeout.count() % 1000000);
342	return tv;
343	}
344
345	const std::chrono::microseconds m_timeout;
346	socket_type m_socket;
347
348	using unique_addr_info_ptr = std::unique_ptr<addrinfo, decltype([](addrinfo* p) {
349	if(p != nullptr) {
350	::freeaddrinfo(p);
351	}
352	})>;
353	};
354
355	#endif
356
357	} // namespace
358
359	std::unique_ptr<OS::Socket> OS::open_socket(std::string_view hostname,	1✔
360	std::string_view service,
361	std::chrono::milliseconds timeout) {
362	#if defined(BOTAN_HAS_BOOST_ASIO)
363	return std::make_unique<Asio_Socket>(hostname, service, timeout);	1✔
364
365	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) \|\| defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
366	return std::make_unique<BSD_Socket>(hostname, service, timeout);
367
368	#else
369	BOTAN_UNUSED(hostname, service, timeout);
370	// No sockets for you
371	return std::unique_ptr<Socket>();
372	#endif
373	}
374
375	} // namespace Botan

randombit / botan / 22587161270

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