111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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// Helper RAII over winsock udp client socket.
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// Will throw on construction if socket creation failed.
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#include <spdlog/common.h>
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#include <spdlog/details/os.h>
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#include <spdlog/details/windows_include.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string>
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#pragma comment(lib, "Ws2_32.lib")
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#pragma comment(lib, "Mswsock.lib")
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#pragma comment(lib, "AdvApi32.lib")
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namespace spdlog {
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namespace details {
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class udp_client
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{
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static constexpr int TX_BUFFER_SIZE = 1024*10;
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SOCKET socket_ = INVALID_SOCKET;
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sockaddr_in addr_ = {0};
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static void init_winsock_()
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{
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WSADATA wsaData;
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auto rv = ::WSAStartup(MAKEWORD(2, 2), &wsaData);
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if (rv != 0)
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{
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throw_winsock_error_("WSAStartup failed", ::WSAGetLastError());
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}
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}
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static void throw_winsock_error_(const std::string &msg, int last_error)
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{
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char buf[512];
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::FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, last_error,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (sizeof(buf) / sizeof(char)), NULL);
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throw_spdlog_ex(fmt::format("udp_sink - {}: {}", msg, buf));
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}
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void cleanup_()
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{
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if (socket_ != INVALID_SOCKET)
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{
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::closesocket(socket_);
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}
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socket_ = INVALID_SOCKET;
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::WSACleanup();
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}
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public:
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udp_client(const std::string &host, uint16_t port)
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{
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init_winsock_();
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addr_.sin_family = PF_INET;
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addr_.sin_port = htons(port);
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addr_.sin_addr.s_addr = INADDR_ANY;
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if (InetPton(PF_INET, TEXT(host.c_str()), &addr_.sin_addr.s_addr) != 1) {
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int last_error = ::WSAGetLastError();
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::WSACleanup();
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throw_winsock_error_("error: Invalid address!", last_error);
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}
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socket_ = ::socket(PF_INET, SOCK_DGRAM, 0);
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if (socket_ == INVALID_SOCKET)
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{
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int last_error = ::WSAGetLastError();
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::WSACleanup();
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throw_winsock_error_("error: Create Socket failed", last_error);
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}
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int option_value = TX_BUFFER_SIZE;
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if (::setsockopt(socket_, SOL_SOCKET, SO_SNDBUF, reinterpret_cast<const char *>(&option_value), sizeof(option_value)) < 0)
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{
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int last_error = ::WSAGetLastError();
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cleanup_();
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throw_winsock_error_("error: setsockopt(SO_SNDBUF) Failed!", last_error);
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}
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}
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~udp_client()
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{
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cleanup_();
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}
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SOCKET fd() const
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{
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return socket_;
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}
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void send(const char *data, size_t n_bytes)
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{
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socklen_t tolen = sizeof(struct sockaddr);
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if (::sendto(socket_, data, static_cast<int>(n_bytes), 0, (struct sockaddr *)&addr_, tolen) == -1)
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{
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throw_spdlog_ex("sendto(2) failed", errno);
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}
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}
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};
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} // namespace details
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} // namespace spdlog
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