26141725099

Committed 19 May 2026 08:32PM UTC coverage: 89.343% (+0.009%) from 89.334%

Build # 26141725099

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push

github

Committed by

web-flow

Commit Message

Merge pull request #5609 from randombit/jack/improve-http

Improve the HTTP 1.0 client used for OCSP/CRL

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109341 of 122383 relevant lines covered (89.34%)

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83.08

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

/*
* (C) 2015,2016,2017 Jack Lloyd
* (C) 2016 Daniel Neus
* (C) 2019 Nuno Goncalves <nunojpg@gmail.com>
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/socket_udp.h>

#include <botan/exceptn.h>
#include <botan/mem_ops.h>
#include <botan/uri.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 Darwin's termios.h when this
   * file is included in the amalgamation. GH #350
   */
   #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_SocketUDP final : public OS::SocketUDP {
   public:
      Asio_SocketUDP(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :
            m_timeout(timeout), m_timer(m_io), m_udp(m_io) {
         m_timer.expires_after(m_timeout);
         check_timeout();

         // Resolve asynchronously so the timer covers DNS as well as connect.
         // check_timeout() only closes m_udp, which isn't open yet during the
         // resolve, so cancel the resolver inline if the deadline passes.
         boost::asio::ip::udp::resolver resolver(m_io);
         boost::asio::ip::udp::resolver::results_type dns_iter;
         boost::system::error_code resolve_ec = boost::asio::error::would_block;
         resolver.async_resolve(
            std::string{hostname}, std::string{service}, [&](const boost::system::error_code& e, auto results) {
               resolve_ec = e;
               dns_iter = std::move(results);
            });
         while(resolve_ec == boost::asio::error::would_block) {
            if(m_timer.expiry() < decltype(m_timer)::clock_type::now()) {
               resolver.cancel();
            }
            m_io.run_one();
         }
         if(resolve_ec) {
            throw boost::system::system_error(resolve_ec);
         }

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

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

         boost::asio::async_connect(m_udp, 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_udp.is_open()) {
            throw System_Error(fmt("Connection to host {} failed", hostname));
         }
      }

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

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

         m_udp.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_after(m_timeout);

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

         m_udp.async_receive(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_udp.is_open() && m_timer.expiry() < decltype(m_timer)::clock_type::now()) {
            boost::system::error_code err;

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

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

      const std::chrono::microseconds m_timeout;
      boost::asio::io_context m_io;
      boost::asio::system_timer m_timer;
      boost::asio::ip::udp::socket m_udp;
};
#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) || defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
class BSD_SocketUDP final : public OS::SocketUDP {
   public:
      BSD_SocketUDP(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :
            m_timeout(timeout), m_socket(invalid_socket()) {
         socket_init();

         // A constructor that throws does not run its destructor, so do
         // cleanup explicitly on any failure between socket_init() above and
         // the end of construction below.
         try {
            do_connect(hostname, service);
         } catch(...) {
            if(m_socket != invalid_socket()) {
               close_socket(m_socket);
               m_socket = invalid_socket();
            }
            socket_fini();
            throw;
         }
      }

   private:
      void do_connect(std::string_view hostname, std::string_view service) {
         const std::string hostname_str(hostname);
         const std::string service_str(service);

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

         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()) [[unlikely]] {
               // unsupported socket type?
               continue;
            }

   #if !defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
            // Windows fd_set is an array of sockets and doesn't have this limitation
            if(m_socket >= FD_SETSIZE) {
               close_socket(m_socket);
               m_socket = invalid_socket();
               throw System_Error("Socket descriptor exceeds FD_SETSIZE; select() would be unsafe");
            }
   #endif

            set_nonblocking(m_socket);

            // Connect the UDP socket to the selected peer so the kernel drops
            // datagrams arriving from anyone else. Without this a stray or
            // spoofed datagram could be accepted as the response.
            //
            // ::connect on a UDP socket only records the peer address in the
            // kernel; it does not produce or consume traffic. It is effectively
            // non-blocking on every supported platform, so we don't wrap this
            // in the select() pattern used by the TCP path.
            if(::connect(m_socket, rp->ai_addr, static_cast<socklen_t>(rp->ai_addrlen)) != 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, last_socket_error()),
               last_socket_error());
         }
      }

   public:
      ~BSD_SocketUDP() override {
         close_socket(m_socket);
         m_socket = invalid_socket();
         socket_fini();
      }

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

      void write(const uint8_t buf[], size_t len) override {
         size_t sent_so_far = 0;
         while(sent_so_far != len) {
            fd_set write_set;
            FD_ZERO(&write_set);
            FD_SET(m_socket, &write_set);

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

            if(active < 0) {
               if(last_error_is_retryable()) {
                  continue;
               }
               throw System_Error("Socket select failed", last_socket_error());
            }

            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) {
               if(last_error_is_retryable()) {
                  continue;
               }
               throw System_Error("Socket write failed", last_socket_error());
            } else {
               sent_so_far += static_cast<size_t>(sent);
            }
         }
      }

      size_t read(uint8_t buf[], size_t len) override {
         for(;;) {
            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) {
               if(last_error_is_retryable()) {
                  continue;
               }
               throw System_Error("Socket select failed", last_socket_error());
            }

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

            // Socket is connected, so recv() filters out datagrams from any
            // sender other than the configured peer.
            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) {
               if(last_error_is_retryable()) {
                  continue;
               }
               throw System_Error("Socket read failed", last_socket_error());
            }

            return static_cast<size_t>(got);
         }
      }

   private:
   #if defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
      typedef SOCKET socket_type;
      typedef int socket_op_ret_type;
      typedef int sendrecv_len_type;

      static socket_type invalid_socket() { return INVALID_SOCKET; }

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

      static int last_socket_error() { return ::WSAGetLastError(); }

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

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

      static bool last_error_is_retryable() { return (::WSAGetLastError() == WSAEINTR); }

      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 size_t sendrecv_len_type;

      static socket_type invalid_socket() { return -1; }

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

      static int last_socket_error() { return errno; }

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

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

      static bool last_error_is_retryable() { return (errno == EINTR); }

      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
      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::SocketUDP> OS::open_socket_udp(std::string_view hostname,
                                                   std::string_view service,
                                                   std::chrono::microseconds timeout) {
#if defined(BOTAN_HAS_BOOST_ASIO)
   return std::make_unique<Asio_SocketUDP>(hostname, service, timeout);
#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) || defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
   return std::make_unique<BSD_SocketUDP>(hostname, service, timeout);
#else
   BOTAN_UNUSED(hostname);
   BOTAN_UNUSED(service);
   BOTAN_UNUSED(timeout);
   return std::unique_ptr<OS::SocketUDP>();
#endif
}

std::unique_ptr<OS::SocketUDP> OS::open_socket_udp(std::string_view uri_string, std::chrono::microseconds timeout) {
   const auto authority = URI::Authority::parse(uri_string);
   if(!authority.has_value() || !authority->port().has_value()) {
      throw Invalid_Argument("UDP port not specified");
   }
   return open_socket_udp(authority->host_to_string(), std::to_string(*authority->port()), timeout);
}

}  // namespace Botan

1	/*
2	* (C) 2015,2016,2017 Jack Lloyd
3	* (C) 2016 Daniel Neus
4	* (C) 2019 Nuno Goncalves <nunojpg@gmail.com>
5	*
6	* Botan is released under the Simplified BSD License (see license.txt)
7	*/
8
9	#include <botan/internal/socket_udp.h>
10
11	#include <botan/exceptn.h>
12	#include <botan/mem_ops.h>
13	#include <botan/uri.h>
14	#include <botan/internal/fmt.h>
15	#include <botan/internal/stl_util.h>
16	#include <botan/internal/target_info.h>
17	#include <chrono>
18
19	#if defined(BOTAN_HAS_BOOST_ASIO)
20	/*
21	* We don't need serial port support anyway, and asking for it
22	* causes macro conflicts with Darwin's termios.h when this
23	* file is included in the amalgamation. GH #350
24	*/
25	#define BOOST_ASIO_DISABLE_SERIAL_PORT
26	#include <boost/asio.hpp>
27	#include <boost/asio/system_timer.hpp>
28	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS)
29	#include <errno.h>
30	#include <fcntl.h>
31	#include <netdb.h>
32	#include <netinet/in.h>
33	#include <string.h>
34	#include <sys/socket.h>
35	#include <sys/time.h>
36	#include <unistd.h>
37
38	#elif defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
39	#include <ws2tcpip.h>
40	#endif
41
42	namespace Botan {
43
44	namespace {
45
46	#if defined(BOTAN_HAS_BOOST_ASIO)
47	class Asio_SocketUDP final : public OS::SocketUDP {	×
48	public:
49	Asio_SocketUDP(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :	6✔
50	m_timeout(timeout), m_timer(m_io), m_udp(m_io) {	12✔
51	m_timer.expires_after(m_timeout);	6✔
52	check_timeout();	6✔
53
54	// Resolve asynchronously so the timer covers DNS as well as connect.
55	// check_timeout() only closes m_udp, which isn't open yet during the
56	// resolve, so cancel the resolver inline if the deadline passes.
57	boost::asio::ip::udp::resolver resolver(m_io);	6✔
58	boost::asio::ip::udp::resolver::results_type dns_iter;	6✔
59	boost::system::error_code resolve_ec = boost::asio::error::would_block;	6✔
60	resolver.async_resolve(	18✔
61	std::string{hostname}, std::string{service}, [&](const boost::system::error_code& e, auto results) {	12✔
62	resolve_ec = e;	6✔
63	dns_iter = std::move(results);	6✔
64	});
65	while(resolve_ec == boost::asio::error::would_block) {	12✔
66	if(m_timer.expiry() < decltype(m_timer)::clock_type::now()) {	6✔
67	resolver.cancel();	×
68	}
69	m_io.run_one();	6✔
70	}
71	if(resolve_ec) {	6✔
72	throw boost::system::system_error(resolve_ec);	×
73	}
74
75	boost::system::error_code ec = boost::asio::error::would_block;	6✔
76
77	auto connect_cb = [&ec](const boost::system::error_code& e,	12✔
78	const boost::asio::ip::udp::resolver::results_type::iterator&) { ec = e; };	6✔
79
80	boost::asio::async_connect(m_udp, dns_iter.begin(), dns_iter.end(), connect_cb);	12✔
81
82	while(ec == boost::asio::error::would_block) {	12✔
83	m_io.run_one();	6✔
84	}
85
86	if(ec) {	6✔
87	throw boost::system::system_error(ec);	×
88	}
89	if(!m_udp.is_open()) {	6✔
90	throw System_Error(fmt("Connection to host {} failed", hostname));	×
91	}
92	}	24✔
93
94	void write(const uint8_t buf[], size_t len) override {	6✔
95	m_timer.expires_after(m_timeout);	6✔
96
97	boost::system::error_code ec = boost::asio::error::would_block;	6✔
98
99	m_udp.async_send(boost::asio::buffer(buf, len), [&ec](boost::system::error_code e, size_t) { ec = e; });	12✔
100
101	while(ec == boost::asio::error::would_block) {	18✔
102	m_io.run_one();	12✔
103	}
104
105	if(ec) {	6✔
106	throw boost::system::system_error(ec);	×
107	}
108	}	6✔
109
110	size_t read(uint8_t buf[], size_t len) override {	6✔
111	m_timer.expires_after(m_timeout);	6✔
112
113	boost::system::error_code ec = boost::asio::error::would_block;	6✔
114	size_t got = 0;	6✔
115
116	m_udp.async_receive(boost::asio::buffer(buf, len), [&](boost::system::error_code cb_ec, size_t cb_got) {	6✔
117	ec = cb_ec;	6✔
118	got = cb_got;	6✔
119	});
120
121	while(ec == boost::asio::error::would_block) {	22✔
122	m_io.run_one();	16✔
123	}
124
125	if(ec) {	6✔
126	if(ec == boost::asio::error::eof) {	×
127	return 0;
128	}
129	throw boost::system::system_error(ec); // Some other error.	×
130	}
131
132	return got;	6✔
133	}
134
135	private:
136	void check_timeout() {	18✔
137	if(m_udp.is_open() && m_timer.expiry() < decltype(m_timer)::clock_type::now()) {	18✔
138	boost::system::error_code err;	×
139
140	// NOLINTNEXTLINE(bugprone-unused-return-value,cert-err33-c)
141	m_udp.close(err);	×
142	}
143
144	// NOLINTNEXTLINE(*-avoid-bind) FIXME - unclear why we can't use a lambda here
145	m_timer.async_wait(std::bind(&Asio_SocketUDP::check_timeout, this));	18✔
146	}	18✔
147
148	const std::chrono::microseconds m_timeout;
149	boost::asio::io_context m_io;
150	boost::asio::system_timer m_timer;
151	boost::asio::ip::udp::socket m_udp;
152	};
153	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) \|\| defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
154	class BSD_SocketUDP final : public OS::SocketUDP {
155	public:
156	BSD_SocketUDP(std::string_view hostname, std::string_view service, std::chrono::microseconds timeout) :
157	m_timeout(timeout), m_socket(invalid_socket()) {
158	socket_init();
159
160	// A constructor that throws does not run its destructor, so do
161	// cleanup explicitly on any failure between socket_init() above and
162	// the end of construction below.
163	try {
164	do_connect(hostname, service);
165	} catch(...) {
166	if(m_socket != invalid_socket()) {
167	close_socket(m_socket);
168	m_socket = invalid_socket();
169	}
170	socket_fini();
171	throw;
172	}
173	}
174
175	private:
176	void do_connect(std::string_view hostname, std::string_view service) {
177	const std::string hostname_str(hostname);
178	const std::string service_str(service);
179
180	addrinfo hints{};
181	hints.ai_family = AF_UNSPEC;
182	hints.ai_socktype = SOCK_DGRAM;
183
184	unique_addr_info_ptr res = nullptr;
185
186	const int rc = ::getaddrinfo(hostname_str.c_str(), service_str.c_str(), &hints, Botan::out_ptr(res));
187	if(rc != 0) {
188	throw System_Error(fmt("Name resolution failed for {}", hostname), rc);
189	}
190
191	for(const addrinfo* rp = res.get(); (m_socket == invalid_socket()) && (rp != nullptr); rp = rp->ai_next) {
192	if(rp->ai_family != AF_INET && rp->ai_family != AF_INET6) {
193	continue;
194	}
195
196	m_socket = ::socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
197
198	if(m_socket == invalid_socket()) [[unlikely]] {
199	// unsupported socket type?
200	continue;
201	}
202
203	#if !defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
204	// Windows fd_set is an array of sockets and doesn't have this limitation
205	if(m_socket >= FD_SETSIZE) {
206	close_socket(m_socket);
207	m_socket = invalid_socket();
208	throw System_Error("Socket descriptor exceeds FD_SETSIZE; select() would be unsafe");
209	}
210	#endif
211
212	set_nonblocking(m_socket);
213
214	// Connect the UDP socket to the selected peer so the kernel drops
215	// datagrams arriving from anyone else. Without this a stray or
216	// spoofed datagram could be accepted as the response.
217	//
218	// ::connect on a UDP socket only records the peer address in the
219	// kernel; it does not produce or consume traffic. It is effectively
220	// non-blocking on every supported platform, so we don't wrap this
221	// in the select() pattern used by the TCP path.
222	if(::connect(m_socket, rp->ai_addr, static_cast<socklen_t>(rp->ai_addrlen)) != 0) {
223	close_socket(m_socket);
224	m_socket = invalid_socket();
225	continue;
226	}
227	}
228
229	if(m_socket == invalid_socket()) {
230	throw System_Error(
231	fmt("Connecting to {} for service {} failed with errno {}", hostname, service, last_socket_error()),
232	last_socket_error());
233	}
234	}
235
236	public:
237	~BSD_SocketUDP() override {
238	close_socket(m_socket);
239	m_socket = invalid_socket();
240	socket_fini();
241	}
242
243	BSD_SocketUDP(const BSD_SocketUDP& other) = delete;
244	BSD_SocketUDP(BSD_SocketUDP&& other) = delete;
245	BSD_SocketUDP& operator=(const BSD_SocketUDP& other) = delete;
246	BSD_SocketUDP& operator=(BSD_SocketUDP&& other) = delete;
247
248	void write(const uint8_t buf[], size_t len) override {
249	size_t sent_so_far = 0;
250	while(sent_so_far != len) {
251	fd_set write_set;
252	FD_ZERO(&write_set);
253	FD_SET(m_socket, &write_set);
254
255	struct timeval timeout = make_timeout_tv();
256	const int active = ::select(static_cast<int>(m_socket + 1), nullptr, &write_set, nullptr, &timeout);
257
258	if(active < 0) {
259	if(last_error_is_retryable()) {
260	continue;
261	}
262	throw System_Error("Socket select failed", last_socket_error());
263	}
264
265	if(active == 0) {
266	throw System_Error("Timeout during socket write");
267	}
268
269	const size_t left = len - sent_so_far;
270	const socket_op_ret_type sent =
271	::send(m_socket, cast_uint8_ptr_to_char(buf + sent_so_far), static_cast<sendrecv_len_type>(left), 0);
272	if(sent < 0) {
273	if(last_error_is_retryable()) {
274	continue;
275	}
276	throw System_Error("Socket write failed", last_socket_error());
277	} else {
278	sent_so_far += static_cast<size_t>(sent);
279	}
280	}
281	}
282
283	size_t read(uint8_t buf[], size_t len) override {
284	for(;;) {
285	fd_set read_set;
286	FD_ZERO(&read_set);
287	FD_SET(m_socket, &read_set);
288
289	struct timeval timeout = make_timeout_tv();
290	const int active = ::select(static_cast<int>(m_socket + 1), &read_set, nullptr, nullptr, &timeout);
291
292	if(active < 0) {
293	if(last_error_is_retryable()) {
294	continue;
295	}
296	throw System_Error("Socket select failed", last_socket_error());
297	}
298
299	if(active == 0) {
300	throw System_Error("Timeout during socket read");
301	}
302
303	// Socket is connected, so recv() filters out datagrams from any
304	// sender other than the configured peer.
305	const socket_op_ret_type got =
306	::recv(m_socket, cast_uint8_ptr_to_char(buf), static_cast<sendrecv_len_type>(len), 0);
307
308	if(got < 0) {
309	if(last_error_is_retryable()) {
310	continue;
311	}
312	throw System_Error("Socket read failed", last_socket_error());
313	}
314
315	return static_cast<size_t>(got);
316	}
317	}
318
319	private:
320	#if defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
321	typedef SOCKET socket_type;
322	typedef int socket_op_ret_type;
323	typedef int sendrecv_len_type;
324
325	static socket_type invalid_socket() { return INVALID_SOCKET; }
326
327	static void close_socket(socket_type s) { ::closesocket(s); }
328
329	static int last_socket_error() { return ::WSAGetLastError(); }
330
331	static std::string get_last_socket_error() { return std::to_string(::WSAGetLastError()); }
332
333	static bool nonblocking_connect_in_progress() { return (::WSAGetLastError() == WSAEWOULDBLOCK); }
334
335	static bool last_error_is_retryable() { return (::WSAGetLastError() == WSAEINTR); }
336
337	static void set_nonblocking(socket_type s) {
338	u_long nonblocking = 1;
339	::ioctlsocket(s, FIONBIO, &nonblocking);
340	}
341
342	static void socket_init() {
343	WSAData wsa_data;
344	WORD wsa_version = MAKEWORD(2, 2);
345
346	if(::WSAStartup(wsa_version, &wsa_data) != 0) {
347	throw System_Error("WSAStartup() failed", WSAGetLastError());
348	}
349
350	if(LOBYTE(wsa_data.wVersion) != 2 \|\| HIBYTE(wsa_data.wVersion) != 2) {
351	::WSACleanup();
352	throw System_Error("Could not find a usable version of Winsock.dll");
353	}
354	}
355
356	static void socket_fini() { ::WSACleanup(); }
357	#else
358	typedef int socket_type;
359	typedef ssize_t socket_op_ret_type;
360	typedef size_t sendrecv_len_type;
361
362	static socket_type invalid_socket() { return -1; }
363
364	static void close_socket(socket_type s) { ::close(s); }
365
366	static int last_socket_error() { return errno; }
367
368	static std::string get_last_socket_error() { return ::strerror(errno); }
369
370	static bool nonblocking_connect_in_progress() { return (errno == EINPROGRESS); }
371
372	static bool last_error_is_retryable() { return (errno == EINTR); }
373
374	static void set_nonblocking(socket_type s) {
375	// NOLINTNEXTLINE(*-vararg)
376	if(::fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
377	throw System_Error("Setting socket to non-blocking state failed", errno);
378	}
379	}
380
381	static void socket_init() {}
382
383	static void socket_fini() {}
384	#endif
385	struct timeval make_timeout_tv() const {
386	struct timeval tv {};
387
388	tv.tv_sec = static_cast<decltype(timeval::tv_sec)>(m_timeout.count() / 1000000);
389	tv.tv_usec = static_cast<decltype(timeval::tv_usec)>(m_timeout.count() % 1000000);
390	return tv;
391	}
392
393	const std::chrono::microseconds m_timeout;
394	socket_type m_socket;
395
396	using unique_addr_info_ptr = std::unique_ptr<addrinfo, decltype([](addrinfo* p) {
397	if(p != nullptr) {
398	::freeaddrinfo(p);
399	}
400	})>;
401	};
402	#endif
403	} // namespace
404
405	std::unique_ptr<OS::SocketUDP> OS::open_socket_udp(std::string_view hostname,	6✔
406	std::string_view service,
407	std::chrono::microseconds timeout) {
408	#if defined(BOTAN_HAS_BOOST_ASIO)
409	return std::make_unique<Asio_SocketUDP>(hostname, service, timeout);	6✔
410	#elif defined(BOTAN_TARGET_OS_HAS_SOCKETS) \|\| defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
411	return std::make_unique<BSD_SocketUDP>(hostname, service, timeout);
412	#else
413	BOTAN_UNUSED(hostname);
414	BOTAN_UNUSED(service);
415	BOTAN_UNUSED(timeout);
416	return std::unique_ptr<OS::SocketUDP>();
417	#endif
418	}
419
420	std::unique_ptr<OS::SocketUDP> OS::open_socket_udp(std::string_view uri_string, std::chrono::microseconds timeout) {	6✔
421	const auto authority = URI::Authority::parse(uri_string);	6✔
422	if(!authority.has_value() \|\| !authority->port().has_value()) {	6✔
423	throw Invalid_Argument("UDP port not specified");	×
424	}
425	return open_socket_udp(authority->host_to_string(), std::to_string(*authority->port()), timeout);	12✔
426	}	6✔
427
428	} // namespace Botan

randombit / botan / 26141725099

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