cpp-net-lib/src/socket.hpp at master · lpcvoid/cpp-net-lib · GitHub

History

225 lines (199 loc) · 5.78 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

#pragma once

#include <optional>

#include <system_error>

#ifdef _WIN32

// libs

#pragma comment(lib, "Mswsock.lib")

#pragma comment(lib, "Ws2_32.lib")

#pragma comment(lib, "AdvApi32.lib")

// headers

#include <WS2tcpip.h>

#include <WinSock2.h>

#include <Windows.h>

#include <iphlpapi.h>

#include <stdint.h>

#include <ws2tcpip.h>

// defines

using socket_t = SOCKET;

using socklen_t = int32_t;

using ssize_t = signed long long int;

//we don't have signals on windows

#define MSG_NOSIGNAL 0

//poll implementation

#define poll_syscall ::WSAPoll

//we ignore unused parameter warning on windows, missing impls

#pragma warning(disable: 4100)

//use unsafe functions under windows

#define _CRT_SECURE_NO_WARNINGS

#pragma warning(disable:4996)

#pragma warning(disable:4267)

#pragma warning(disable:4244)

#else

// headers

#include <arpa/inet.h>

#include <chrono>

#include <fcntl.h>

#include <netdb.h>

#include <netinet/in.h>

#include <netinet/tcp.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <unistd.h>

// defines

using socket_t = int32_t;

#define poll_syscall ::poll

// this is actually a nice one to have

#define INVALID_SOCKET (-1)

#ifdef __APPLE__

#ifndef MSG_NOSIGNAL

#define MSG_NOSIGNAL SO_NOSIGPIPE

#endif

namespace netlib {

static std::error_condition socket_get_last_error()

{

std::error_code ec;

#ifdef _WIN32

ec = std::error_code(::GetLastError(), std::system_category());

#else

ec = std::error_code(errno, std::system_category());

#endif

return ec.default_error_condition();

}

enum class AddressFamily { IPv4 = AF_INET, IPv6 = AF_INET6, unspecified = AF_UNSPEC };

enum class AddressProtocol { TCP = SOCK_STREAM, UDP = SOCK_DGRAM };

enum class OperationClass { read = 1, write = 2, both = 3 };

class socket {

private:

std::optional<socket_t> _socket = std::nullopt;

public:

socket() = default;

static bool initialize_system()

{

#ifdef _WIN32

static bool initialized = false;

if (!initialized) {

WSADATA wsaData;

WSAStartup(MAKEWORD(2, 2), &wsaData);

initialized = true;

}

#endif

return true;

}

[[nodiscard]] bool is_valid() const

{

return _socket.has_value() && _socket.value() != INVALID_SOCKET;

}

[[nodiscard]] std::optional<socket_t> get_raw() const

{

return _socket.value();

}

bool set_nonblocking(bool nonblocking = true)

{

#ifdef _WIN32

u_long mode = static_cast<u_long>(nonblocking);

return ioctlsocket(_socket.value(), FIONBIO, &mode) == 0;

#else

return fcntl(_socket.value(), F_SETFL, fcntl(_socket.value(), F_GETFL, 0) | (nonblocking ? O_NONBLOCK : 0)) == 0;

#endif

}

std::optional<std::size_t> get_recv_buffer_size() {

#ifdef _WIN32

#else

int32_t buffer_size = 0;

socklen_t response_size = sizeof(buffer_size);

if (getsockopt(_socket.value(), SOL_SOCKET, SO_RCVBUF, &buffer_size, &response_size) == 0) {

return buffer_size;

}

return std::nullopt;

#endif

}

std::optional<std::size_t> get_send_buffer_size() {

#ifdef _WIN32

#else

int32_t buffer_size = 0;

socklen_t response_size = sizeof(buffer_size);

if (getsockopt(_socket.value(), SOL_SOCKET, SO_SNDBUF, &buffer_size, &response_size) == 0) {

return buffer_size;

}

return std::nullopt;

#endif

}

bool set_recv_buffer_size(std::size_t buf_size) {

#ifdef _WIN32

#else

auto buffer_size = static_cast<int32_t>(buf_size);

return (setsockopt(_socket.value(), SOL_SOCKET, SO_RCVBUF, &buffer_size, sizeof(buffer_size)) == 0);

#endif

}

bool set_send_buffer_size(std::size_t buf_size) {

#ifdef _WIN32

#else

auto buffer_size = static_cast<int32_t>(buf_size);

return (setsockopt(_socket.value(), SOL_SOCKET, SO_SNDBUF, &buffer_size, sizeof(buffer_size)) == 0);

#endif

}

bool set_nagle(bool enable) {

#ifdef _WIN32

int32_t val = static_cast<int32_t>(enable);

return setsockopt(_socket.value(), IPPROTO_TCP, TCP_NODELAY, reinterpret_cast<char *>(&val), sizeof(val)) == 0;

#else

auto mode = static_cast<int32_t>(enable);

return setsockopt(_socket.value(), IPPROTO_TCP, TCP_NODELAY, &mode, sizeof(int32_t)) == 0;

#endif

}

bool set_reuseaddr(bool reuseaddr = true)

{

#ifdef _WIN32

int32_t val = static_cast<int32_t>(reuseaddr);

return setsockopt(_socket.value(), SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char *>(&val), sizeof(val)) == 0;

#else

auto mode = static_cast<int32_t>(reuseaddr);

return setsockopt(_socket.value(), SOL_SOCKET, SO_REUSEADDR, &mode, sizeof(int32_t)) == 0;

#endif

}

std::error_condition create(int32_t domain, int32_t stype, int32_t protocol)

{

initialize_system();

socket_t new_socket = ::socket(domain, stype, protocol);

if (new_socket == INVALID_SOCKET) {

return socket_get_last_error();

}

_socket = new_socket;

if (!set_nagle(false)) {

return socket_get_last_error();

}

return {};

}

void set_raw(socket_t sock)

{

_socket = sock;

}

void close()

{

if (_socket) {

#ifdef _WIN32

closesocket(_socket.value());

#else

::close(_socket.value());

#endif

_socket.reset();

}

bool operator==(const socket &rhs) const

{

if (!_socket.has_value() && !rhs.get_raw().has_value()) {

return true; // empty sockets are equal

}

if (_socket.has_value() ^ rhs.get_raw().has_value()) {

return false; // one is empty, other is not, thus not equal

}

return _socket.value() == rhs._socket.value();

}

bool operator!=(const socket &rhs) const

{

return !(rhs == *this);

}

};

} // namespace netlib

cpp-net-lib/src/socket.hpp at master · lpcvoid/cpp-net-lib · GitHub

Expand file tree

Breadcrumbs

socket.hpp

Latest commit

History

Breadcrumbs

socket.hpp

File metadata and controls