11216175545

Committed 07 Oct 2024 01:06PM UTC coverage: 64.728% (+0.02%) from 64.71%

Build # 11216175545

Build Type

Pull #14754

github

Committed by

web-flow

Commit Message

Merge b95a51a3f into 930ae6013

Pull Request Pull Request #14754: rec: make sure the record cache has sane paramers for each unit test

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56.83

/pdns/sstuff.hh

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#pragma once
#include <string>
#include <sstream>
#include <iostream>
#include "iputils.hh"
#include <cerrno>
#include <sys/types.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/select.h>
#include <fcntl.h>
#include <stdexcept>

#include <csignal>
#include "namespaces.hh"
#include "noinitvector.hh"

using ProtocolType = int; //!< Supported protocol types

//! Representation of a Socket and many of the Berkeley functions available
class Socket
{
public:
  Socket(const Socket&) = delete;
  Socket& operator=(const Socket&) = delete;

  Socket(int socketDesc) :
    d_socket(socketDesc)
  {
  }

  //! Construct a socket of specified address family and socket type.
  Socket(int addressFamily, int socketType, ProtocolType protocolType = 0) :
    d_socket(socket(addressFamily, socketType, protocolType))
  {
    if (d_socket < 0) {
      throw NetworkError(stringerror());
    }
    setCloseOnExec(d_socket);
  }

  Socket(Socket&& rhs) noexcept :
    d_buffer(std::move(rhs.d_buffer)), d_socket(rhs.d_socket)
  {
    rhs.d_socket = -1;
  }

  Socket& operator=(Socket&& rhs) noexcept
  {
    if (d_socket != -1) {
      close(d_socket);
    }
    d_socket = rhs.d_socket;
    rhs.d_socket = -1;
    d_buffer = std::move(rhs.d_buffer);
    return *this;
  }

  ~Socket()
  {
    try {
      if (d_socket != -1) {
        closesocket(d_socket);
      }
    }
    catch (const PDNSException& e) {
    }
  }

  //! If the socket is capable of doing so, this function will wait for a connection
  [[nodiscard]] std::unique_ptr<Socket> accept() const
  {
    sockaddr_in remote{};
    socklen_t remlen = sizeof(remote);
    memset(&remote, 0, sizeof(remote));
    int sock = ::accept(d_socket, reinterpret_cast<sockaddr*>(&remote), &remlen); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): it's the API
    if (sock < 0) {
      if (errno == EAGAIN) {
        return nullptr;
      }

      throw NetworkError("Accepting a connection: " + stringerror());
    }

    return std::make_unique<Socket>(sock);
  }

  //! Get remote address
  bool getRemote(ComboAddress& remote) const
  {
    socklen_t remotelen = sizeof(remote);
    return getpeername(d_socket, reinterpret_cast<struct sockaddr*>(&remote), &remotelen) >= 0; // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): it's the API
  }

  //! Check remote address against netmaskgroup ng
  [[nodiscard]] bool acl(const NetmaskGroup& netmaskGroup) const
  {
    ComboAddress remote;
    if (getRemote(remote)) {
      return netmaskGroup.match(remote);
    }

    return false;
  }

  //! Set the socket to non-blocking
  void setNonBlocking() const
  {
    ::setNonBlocking(d_socket);
  }

  //! Set the socket to blocking
  void setBlocking() const
  {
    ::setBlocking(d_socket);
  }

  void setReuseAddr() const
  {
    try {
      ::setReuseAddr(d_socket);
    }
    catch (const PDNSException& e) {
      throw NetworkError(e.reason);
    }
  }

  void setFastOpenConnect()
  {
#ifdef TCP_FASTOPEN_CONNECT
    int on = 1;
    if (setsockopt(d_socket, IPPROTO_TCP, TCP_FASTOPEN_CONNECT, &on, sizeof(on)) < 0) {
      throw NetworkError("While setting TCP_FASTOPEN_CONNECT: " + stringerror());
    }
#else
    throw NetworkError("While setting TCP_FASTOPEN_CONNECT: not compiled in");
#endif
  }

  //! Bind the socket to a specified endpoint
  void bind(const ComboAddress& local, bool reuseaddr = true) const
  {
    int tmp = 1;
    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
    if (reuseaddr && setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char*>(&tmp), sizeof tmp) < 0) {
      throw NetworkError("Setsockopt failed: " + stringerror());
    }
    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
    if (::bind(d_socket, reinterpret_cast<const struct sockaddr*>(&local), local.getSocklen()) < 0) {
      throw NetworkError("While binding: " + stringerror());
    }
  }

  //! Connect the socket to a specified endpoint
  void connect(const ComboAddress& address, int timeout = 0) const
  {
    SConnectWithTimeout(d_socket, address, timeval{timeout, 0});
  }

  //! For datagram sockets, receive a datagram and learn where it came from
  /** For datagram sockets, receive a datagram and learn where it came from
      \param dgram Will be filled with the datagram
      \param ep Will be filled with the origin of the datagram */
  void recvFrom(string& dgram, ComboAddress& remote) const
  {
    socklen_t remlen = sizeof(remote);
    if (dgram.size() < s_buflen) {
      dgram.resize(s_buflen);
    }
    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
    auto bytes = recvfrom(d_socket, dgram.data(), dgram.size(), 0, reinterpret_cast<sockaddr*>(&remote), &remlen);
    if (bytes < 0) {
      throw NetworkError("After recvfrom: " + stringerror());
    }
    dgram.resize(static_cast<size_t>(bytes));
  }

  bool recvFromAsync(PacketBuffer& dgram, ComboAddress& remote) const
  {
    socklen_t remlen = sizeof(remote);
    if (dgram.size() < s_buflen) {
      dgram.resize(s_buflen);
    }
    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
    auto bytes = recvfrom(d_socket, dgram.data(), dgram.size(), 0, reinterpret_cast<sockaddr*>(&remote), &remlen);
    if (bytes < 0) {
      if (errno != EAGAIN) {
        throw NetworkError("After async recvfrom: " + stringerror());
      }
      return false;
    }
    dgram.resize(static_cast<size_t>(bytes));
    return true;
  }

  //! For datagram sockets, send a datagram to a destination
  void sendTo(const char* msg, size_t len, const ComboAddress& remote) const
  {
    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
    if (sendto(d_socket, msg, len, 0, reinterpret_cast<const sockaddr*>(&remote), remote.getSocklen()) < 0) {
      throw NetworkError("After sendto: " + stringerror());
    }
  }

  //! For connected datagram sockets, send a datagram
  void send(const std::string& msg) const
  {
    if (::send(d_socket, msg.data(), msg.size(), 0) < 0) {
      throw NetworkError("After send: " + stringerror());
    }
  }

  /** For datagram sockets, send a datagram to a destination
      \param dgram The datagram
      \param remote The intended destination of the datagram */
  void sendTo(const string& dgram, const ComboAddress& remote) const
  {
    sendTo(dgram.data(), dgram.length(), remote);
  }

  //! Write this data to the socket, taking care that all bytes are written out
  void writen(const string& data) const
  {
    if (data.empty()) {
      return;
    }

    size_t toWrite = data.length();
    const char* ptr = data.data();

    do {
      auto res = ::send(d_socket, ptr, toWrite, 0);
      if (res < 0) {
        throw NetworkError("Writing to a socket: " + stringerror());
      }
      if (res == 0) {
        throw NetworkError("EOF on socket");
      }
      toWrite -= static_cast<size_t>(res);
      ptr += static_cast<size_t>(res); // NOLINT(cppcoreguidelines-pro-bounds-pointer-arithmetic)
    } while (toWrite > 0);
  }

  //! tries to write toWrite bytes from ptr to the socket
  /** tries to write toWrite bytes from ptr to the socket, but does not make sure they al get written out
      \param ptr Location to write from
      \param toWrite number of bytes to try
  */
  size_t tryWrite(const char* ptr, size_t toWrite) const
  {
    auto res = ::send(d_socket, ptr, toWrite, 0);
    if (res == 0) {
      throw NetworkError("EOF on writing to a socket");
    }
    if (res > 0) {
      return res;
    }

    if (errno == EAGAIN) {
      return 0;
    }

    throw NetworkError("Writing to a socket: " + stringerror());
  }

  //! Writes toWrite bytes from ptr to the socket
  /** Writes toWrite bytes from ptr to the socket. Returns how many bytes were written */
  size_t write(const char* ptr, size_t toWrite) const
  {
    auto res = ::send(d_socket, ptr, toWrite, 0);
    if (res < 0) {
      throw NetworkError("Writing to a socket: " + stringerror());
    }
    return res;
  }

  void writenWithTimeout(const void* buffer, size_t n, int timeout) const
  {
    size_t bytes = n;
    const char* ptr = static_cast<const char*>(buffer);

    while (bytes > 0) {
      auto ret = ::write(d_socket, ptr, bytes);
      if (ret < 0) {
        if (errno == EAGAIN) {
          ret = waitForRWData(d_socket, false, timeout, 0);
          if (ret < 0) {
            throw NetworkError("Waiting for data write");
          }
          if (ret == 0) {
            throw NetworkError("Timeout writing data");
          }
          continue;
        }
        throw NetworkError("Writing data: " + stringerror());
      }
      if (ret == 0) {
        throw NetworkError("Did not fulfill TCP write due to EOF");
      }

      ptr += static_cast<size_t>(ret); // NOLINT(cppcoreguidelines-pro-bounds-pointer-arithmetic)
      bytes -= static_cast<size_t>(ret);
    }
  }

  //! reads one character from the socket
  [[nodiscard]] int getChar() const
  {
    char character{};

    ssize_t res = ::recv(d_socket, &character, 1, 0);
    if (res == 0) {
      return character;
    }
    return -1;
  }

  void getline(string& data) const
  {
    data.clear();
    while (true) {
      int character = getChar();
      if (character == -1) {
        break;
      }
      data += (char)character;
      if (character == '\n') {
        break;
      }
    }
  }

  //! Reads a block of data from the socket to a string
  void read(string& data)
  {
    d_buffer.resize(s_buflen);
    ssize_t res = ::recv(d_socket, d_buffer.data(), s_buflen, 0);
    if (res < 0) {
      throw NetworkError("Reading from a socket: " + stringerror());
    }
    data.assign(d_buffer, 0, static_cast<size_t>(res));
  }

  //! Reads a block of data from the socket to a block of memory
  size_t read(char* buffer, size_t bytes) const
  {
    auto res = ::recv(d_socket, buffer, bytes, 0);
    if (res < 0) {
      throw NetworkError("Reading from a socket: " + stringerror());
    }
    return static_cast<size_t>(res);
  }

  /** Read a bock of data from the socket to a block of memory,
   *   waiting at most 'timeout' seconds for the data to become
   *   available. Be aware that this does _NOT_ handle partial reads
   *   for you.
   */
  size_t readWithTimeout(char* buffer, size_t n, int timeout) const
  {
    int err = waitForRWData(d_socket, true, timeout, 0);

    if (err == 0) {
      throw NetworkError("timeout reading");
    }
    if (err < 0) {
      throw NetworkError("nonblocking read failed: " + stringerror());
    }

    return read(buffer, n);
  }

  //! Sets the socket to listen with a default listen backlog of 10 pending connections
  void listen(int length = 10) const
  {
    if (::listen(d_socket, length) < 0) {
      throw NetworkError("Setting socket to listen: " + stringerror());
    }
  }

  //! Returns the internal file descriptor of the socket
  [[nodiscard]] int getHandle() const
  {
    return d_socket;
  }

  int releaseHandle()
  {
    int ret = d_socket;
    d_socket = -1;
    return ret;
  }

private:
  static constexpr size_t s_buflen{4096};
  std::string d_buffer;
  int d_socket;
};

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22	#pragma once
23	#include <string>
24	#include <sstream>
25	#include <iostream>
26	#include "iputils.hh"
27	#include <cerrno>
28	#include <sys/types.h>
29	#include <unistd.h>
30	#include <sys/socket.h>
31	#include <netinet/in.h>
32	#include <netinet/tcp.h>
33	#include <arpa/inet.h>
34	#include <sys/select.h>
35	#include <fcntl.h>
36	#include <stdexcept>
37
38	#include <csignal>
39	#include "namespaces.hh"
40	#include "noinitvector.hh"
41
42	using ProtocolType = int; //!< Supported protocol types
43
44	//! Representation of a Socket and many of the Berkeley functions available
45	class Socket
46	{
47	public:
48	Socket(const Socket&) = delete;
49	Socket& operator=(const Socket&) = delete;
50
51	Socket(int socketDesc) :
52	d_socket(socketDesc)
53	{	12,657✔
54	}	12,657✔
55
56	//! Construct a socket of specified address family and socket type.
57	Socket(int addressFamily, int socketType, ProtocolType protocolType = 0) :
58	d_socket(socket(addressFamily, socketType, protocolType))
59	{	57,398✔
60	if (d_socket < 0) {	57,398!
61	throw NetworkError(stringerror());	×
62	}	×
63	setCloseOnExec(d_socket);	57,398✔
64	}	57,398✔
65
66	Socket(Socket&& rhs) noexcept :
67	d_buffer(std::move(rhs.d_buffer)), d_socket(rhs.d_socket)
68	{	2,383✔
69	rhs.d_socket = -1;	2,383✔
70	}	2,383✔
71
72	Socket& operator=(Socket&& rhs) noexcept
73	{	2,462✔
74	if (d_socket != -1) {	2,462!
75	close(d_socket);	×
76	}	×
77	d_socket = rhs.d_socket;	2,462✔
78	rhs.d_socket = -1;	2,462✔
79	d_buffer = std::move(rhs.d_buffer);	2,462✔
80	return *this;	2,462✔
81	}	2,462✔
82
83	~Socket()
84	{	90,268✔
85	try {	90,268✔
86	if (d_socket != -1) {	90,268✔
87	closesocket(d_socket);	36,591✔
88	}	36,591✔
89	}	90,268✔
90	catch (const PDNSException& e) {	90,268✔
91	}	×
92	}	90,268✔
93
94	//! If the socket is capable of doing so, this function will wait for a connection
95	[[nodiscard]] std::unique_ptr<Socket> accept() const
96	{	1,646✔
97	sockaddr_in remote{};	1,646✔
98	socklen_t remlen = sizeof(remote);	1,646✔
99	memset(&remote, 0, sizeof(remote));	1,646✔
100	int sock = ::accept(d_socket, reinterpret_cast<sockaddr*>(&remote), &remlen); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): it's the API	1,646✔
101	if (sock < 0) {	1,646!
102	if (errno == EAGAIN) {	×
103	return nullptr;	×
104	}	×
105
106	throw NetworkError("Accepting a connection: " + stringerror());	×
107	}	×
108
109	return std::make_unique<Socket>(sock);	1,646✔
110	}	1,646✔
111
112	//! Get remote address
113	bool getRemote(ComboAddress& remote) const
114	{	3,262✔
115	socklen_t remotelen = sizeof(remote);	3,262✔
116	return getpeername(d_socket, reinterpret_cast<struct sockaddr*>(&remote), &remotelen) >= 0; // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): it's the API	3,262✔
117	}	3,262✔
118
119	//! Check remote address against netmaskgroup ng
120	[[nodiscard]] bool acl(const NetmaskGroup& netmaskGroup) const
121	{	1,632✔
122	ComboAddress remote;	1,632✔
123	if (getRemote(remote)) {	1,632!
124	return netmaskGroup.match(remote);	1,632✔
125	}	1,632✔
126
127	return false;	×
128	}	1,632✔
129
130	//! Set the socket to non-blocking
131	void setNonBlocking() const
132	{	34,070✔
133	::setNonBlocking(d_socket);	34,070✔
134	}	34,070✔
135
136	//! Set the socket to blocking
137	void setBlocking() const
138	{	8✔
139	::setBlocking(d_socket);	8✔
140	}	8✔
141
142	void setReuseAddr() const
143	{	53✔
144	try {	53✔
145	::setReuseAddr(d_socket);	53✔
146	}	53✔
147	catch (const PDNSException& e) {	53✔
148	throw NetworkError(e.reason);	×
149	}	×
150	}	53✔
151
152	void setFastOpenConnect()
153	{	×
154	#ifdef TCP_FASTOPEN_CONNECT	×
155	int on = 1;	×
156	if (setsockopt(d_socket, IPPROTO_TCP, TCP_FASTOPEN_CONNECT, &on, sizeof(on)) < 0) {	×
157	throw NetworkError("While setting TCP_FASTOPEN_CONNECT: " + stringerror());	×
158	}	×
159	#else
160	throw NetworkError("While setting TCP_FASTOPEN_CONNECT: not compiled in");
161	#endif
162	}	×
163
164	//! Bind the socket to a specified endpoint
165	void bind(const ComboAddress& local, bool reuseaddr = true) const
166	{	762✔
167	int tmp = 1;	762✔
168	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
169	if (reuseaddr && setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char*>(&tmp), sizeof tmp) < 0) {	762!
170	throw NetworkError("Setsockopt failed: " + stringerror());	×
171	}	×
172	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
173	if (::bind(d_socket, reinterpret_cast<const struct sockaddr*>(&local), local.getSocklen()) < 0) {	762!
174	throw NetworkError("While binding: " + stringerror());	×
175	}	×
176	}	762✔
177
178	//! Connect the socket to a specified endpoint
179	void connect(const ComboAddress& address, int timeout = 0) const
180	{	20,646✔
181	SConnectWithTimeout(d_socket, address, timeval{timeout, 0});	20,646✔
182	}	20,646✔
183
184	//! For datagram sockets, receive a datagram and learn where it came from
185	/** For datagram sockets, receive a datagram and learn where it came from
186	\param dgram Will be filled with the datagram
187	\param ep Will be filled with the origin of the datagram */
188	void recvFrom(string& dgram, ComboAddress& remote) const
189	{
190	socklen_t remlen = sizeof(remote);
191	if (dgram.size() < s_buflen) {
192	dgram.resize(s_buflen);
193	}
194	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
195	auto bytes = recvfrom(d_socket, dgram.data(), dgram.size(), 0, reinterpret_cast<sockaddr*>(&remote), &remlen);
196	if (bytes < 0) {
197	throw NetworkError("After recvfrom: " + stringerror());
198	}
199	dgram.resize(static_cast<size_t>(bytes));
200	}
201
202	bool recvFromAsync(PacketBuffer& dgram, ComboAddress& remote) const
203	{	×
204	socklen_t remlen = sizeof(remote);	×
205	if (dgram.size() < s_buflen) {	×
206	dgram.resize(s_buflen);	×
207	}	×
208	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)	×
209	auto bytes = recvfrom(d_socket, dgram.data(), dgram.size(), 0, reinterpret_cast<sockaddr*>(&remote), &remlen);	×
210	if (bytes < 0) {	×
211	if (errno != EAGAIN) {	×
212	throw NetworkError("After async recvfrom: " + stringerror());	×
213	}	×
214	return false;	×
215	}	×
216	dgram.resize(static_cast<size_t>(bytes));	×
217	return true;	×
218	}	×
219
220	//! For datagram sockets, send a datagram to a destination
221	void sendTo(const char* msg, size_t len, const ComboAddress& remote) const
222	{
223	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
224	if (sendto(d_socket, msg, len, 0, reinterpret_cast<const sockaddr*>(&remote), remote.getSocklen()) < 0) {
225	throw NetworkError("After sendto: " + stringerror());
226	}
227	}
228
229	//! For connected datagram sockets, send a datagram
230	void send(const std::string& msg) const
231	{	315✔
232	if (::send(d_socket, msg.data(), msg.size(), 0) < 0) {	315!
233	throw NetworkError("After send: " + stringerror());	×
234	}	×
235	}	315✔
236
237	/** For datagram sockets, send a datagram to a destination
238	\param dgram The datagram
239	\param remote The intended destination of the datagram */
240	void sendTo(const string& dgram, const ComboAddress& remote) const
241	{
242	sendTo(dgram.data(), dgram.length(), remote);
243	}
244
245	//! Write this data to the socket, taking care that all bytes are written out
246	void writen(const string& data) const
247	{	16✔
248	if (data.empty()) {	16!
249	return;
250	}
251
252	size_t toWrite = data.length();	16✔
253	const char* ptr = data.data();	16✔
254
255	do {	16✔
256	auto res = ::send(d_socket, ptr, toWrite, 0);	16✔
257	if (res < 0) {	16!
258	throw NetworkError("Writing to a socket: " + stringerror());
259	}
260	if (res == 0) {	16!
261	throw NetworkError("EOF on socket");
262	}
263	toWrite -= static_cast<size_t>(res);	16✔
264	ptr += static_cast<size_t>(res); // NOLINT(cppcoreguidelines-pro-bounds-pointer-arithmetic)	16✔
265	} while (toWrite > 0);	16!
266	}	16✔
267
268	//! tries to write toWrite bytes from ptr to the socket
269	/** tries to write toWrite bytes from ptr to the socket, but does not make sure they al get written out
270	\param ptr Location to write from
271	\param toWrite number of bytes to try
272	*/
273	size_t tryWrite(const char* ptr, size_t toWrite) const
274	{	×
275	auto res = ::send(d_socket, ptr, toWrite, 0);	×
276	if (res == 0) {	×
277	throw NetworkError("EOF on writing to a socket");	×
278	}	×
279	if (res > 0) {	×
280	return res;	×
281	}	×
282		×
283	if (errno == EAGAIN) {	×
284	return 0;	×
285	}	×
286		×
287	throw NetworkError("Writing to a socket: " + stringerror());	×
288	}	×
289
290	//! Writes toWrite bytes from ptr to the socket
291	/** Writes toWrite bytes from ptr to the socket. Returns how many bytes were written */
292	size_t write(const char* ptr, size_t toWrite) const
293	{
294	auto res = ::send(d_socket, ptr, toWrite, 0);
295	if (res < 0) {
296	throw NetworkError("Writing to a socket: " + stringerror());
297	}
298	return res;
299	}
300
301	void writenWithTimeout(const void* buffer, size_t n, int timeout) const
302	{	1,774✔
303	size_t bytes = n;	1,774✔
304	const char* ptr = static_cast<const char*>(buffer);	1,774✔
305
306	while (bytes > 0) {	3,556✔
307	auto ret = ::write(d_socket, ptr, bytes);	1,782✔
308	if (ret < 0) {	1,782✔
309	if (errno == EAGAIN) {	4!
310	ret = waitForRWData(d_socket, false, timeout, 0);	4✔
311	if (ret < 0) {	4!
312	throw NetworkError("Waiting for data write");	×
313	}	×
314	if (ret == 0) {	4!
315	throw NetworkError("Timeout writing data");	×
316	}	×
317	continue;	4✔
318	}	4✔
319	throw NetworkError("Writing data: " + stringerror());	×
320	}	4✔
321	if (ret == 0) {	1,778!
322	throw NetworkError("Did not fulfill TCP write due to EOF");	×
323	}	×
324
325	ptr += static_cast<size_t>(ret); // NOLINT(cppcoreguidelines-pro-bounds-pointer-arithmetic)	1,778✔
326	bytes -= static_cast<size_t>(ret);	1,778✔
327	}	1,778✔
328	}	1,774✔
329
330	//! reads one character from the socket
331	[[nodiscard]] int getChar() const
332	{	×
333	char character{};	×
334		×
335	ssize_t res = ::recv(d_socket, &character, 1, 0);	×
336	if (res == 0) {	×
337	return character;	×
338	}	×
339	return -1;	×
340	}	×
341
342	void getline(string& data) const
343	{	×
344	data.clear();	×
345	while (true) {	×
346	int character = getChar();	×
347	if (character == -1) {	×
348	break;	×
349	}	×
350	data += (char)character;	×
351	if (character == '\n') {	×
352	break;	×
353	}	×
354	}	×
355	}	×
356
357	//! Reads a block of data from the socket to a string
358	void read(string& data)
359	{	311✔
360	d_buffer.resize(s_buflen);	311✔
361	ssize_t res = ::recv(d_socket, d_buffer.data(), s_buflen, 0);	311✔
362	if (res < 0) {	311!
UNCOV 363	throw NetworkError("Reading from a socket: " + stringerror());	×
UNCOV 364	}	×
365	data.assign(d_buffer, 0, static_cast<size_t>(res));	311✔
366	}	311✔
367
368	//! Reads a block of data from the socket to a block of memory
369	size_t read(char* buffer, size_t bytes) const
370	{	27,653✔
371	auto res = ::recv(d_socket, buffer, bytes, 0);	27,653✔
372	if (res < 0) {	27,653✔
373	throw NetworkError("Reading from a socket: " + stringerror());	4✔
374	}	4✔
375	return static_cast<size_t>(res);	27,649✔
376	}	27,653✔
377
378	/** Read a bock of data from the socket to a block of memory,
379	* waiting at most 'timeout' seconds for the data to become
380	* available. Be aware that this does _NOT_ handle partial reads
381	* for you.
382	*/
383	size_t readWithTimeout(char* buffer, size_t n, int timeout) const
384	{	1,965✔
385	int err = waitForRWData(d_socket, true, timeout, 0);	1,965✔
386
387	if (err == 0) {	1,965!
388	throw NetworkError("timeout reading");	×
389	}	×
390	if (err < 0) {	1,965!
391	throw NetworkError("nonblocking read failed: " + stringerror());	×
392	}	×
393
394	return read(buffer, n);	1,965✔
395	}	1,965✔
396
397	//! Sets the socket to listen with a default listen backlog of 10 pending connections
398	void listen(int length = 10) const
399	{	229✔
400	if (::listen(d_socket, length) < 0) {	229!
401	throw NetworkError("Setting socket to listen: " + stringerror());	×
402	}	×
403	}	229✔
404
405	//! Returns the internal file descriptor of the socket
406	[[nodiscard]] int getHandle() const
407	{	145,353✔
408	return d_socket;	145,353✔
409	}	145,353✔
410
411	int releaseHandle()
412	{	7,454✔
413	int ret = d_socket;	7,454✔
414	d_socket = -1;	7,454✔
415	return ret;	7,454✔
416	}	7,454✔
417
418	private:
419	static constexpr size_t s_buflen{4096};
420	std::string d_buffer;
421	int d_socket;
422	};

PowerDNS / pdns / 11216175545

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