5111374265

Committed 29 May 2023 11:19AM UTC coverage: 92.227% (+0.5%) from 91.723%

Build # 5111374265

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randombit

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Next release will be 3.1.0. Update release notes

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/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 <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_from_now(m_timeout);
         check_timeout();

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

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

         auto connect_cb = [&ec](const boost::system::error_code& e, boost::asio::ip::tcp::resolver::iterator) {
            ec = e;
         };

         boost::asio::async_connect(m_tcp, dns_iter, 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() == false)
            throw System_Error(fmt("Connection to host {} failed", hostname));
      }

      void write(const uint8_t buf[], size_t len) override {
         m_timer.expires_from_now(m_timeout);

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

         m_tcp.async_send(boost::asio::buffer(buf, len), [&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_from_now(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.expires_at() < std::chrono::system_clock::now()) {
            boost::system::error_code err;
            m_tcp.close(err);
         }

         m_timer.async_wait(std::bind(&Asio_Socket::check_timeout, this));
      }

      const std::chrono::milliseconds m_timeout;
      boost::asio::io_service 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) {
         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) {
         socket_init();

         m_socket = invalid_socket();

         addrinfo hints;
         clear_mem(&hints, 1);
         hints.ai_family = AF_UNSPEC;
         hints.ai_socktype = SOCK_STREAM;
         addrinfo* res;

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

         int rc = ::getaddrinfo(hostname_str.c_str(), service_str.c_str(), &hints, &res);

         if(rc != 0) {
            throw System_Error(fmt("Name resolution failed for {}", hostname), rc);
         }

         for(addrinfo* rp = res; (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);

            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);
                  // Weirdly, Winsock uses a SOCKET type but wants FD_SET to get an int instead
                  FD_SET(static_cast<int>(m_socket), &write_set);

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

                  if(active) {
                     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;
               }
            }
         }

         ::freeaddrinfo(res);

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

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

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

         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;
};

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

randombit / botan / 5111374265

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