mirror of
https://github.com/laomms/wxhelper.git
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82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
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// 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 unix udp client socket.
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// Will throw on construction if the socket creation failed.
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#ifdef _WIN32
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#error "include udp_client-windows.h instead"
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#endif
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#include <arpa/inet.h>
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#include <cstring>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/udp.h>
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#include <spdlog/common.h>
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#include <spdlog/details/os.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <string>
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namespace spdlog {
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namespace details {
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class udp_client {
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static constexpr int TX_BUFFER_SIZE = 1024 * 10;
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int socket_ = -1;
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struct sockaddr_in sockAddr_;
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void cleanup_() {
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if (socket_ != -1) {
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::close(socket_);
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socket_ = -1;
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}
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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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socket_ = ::socket(PF_INET, SOCK_DGRAM, 0);
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if (socket_ < 0) {
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throw_spdlog_ex("error: Create Socket Failed!");
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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,
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reinterpret_cast<const char *>(&option_value), sizeof(option_value)) < 0) {
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cleanup_();
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throw_spdlog_ex("error: setsockopt(SO_SNDBUF) Failed!");
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}
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sockAddr_.sin_family = AF_INET;
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sockAddr_.sin_port = htons(port);
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if (::inet_aton(host.c_str(), &sockAddr_.sin_addr) == 0) {
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cleanup_();
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throw_spdlog_ex("error: Invalid address!");
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}
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::memset(sockAddr_.sin_zero, 0x00, sizeof(sockAddr_.sin_zero));
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}
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~udp_client() { cleanup_(); }
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int fd() const { return socket_; }
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// Send exactly n_bytes of the given data.
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// On error close the connection and throw.
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void send(const char *data, size_t n_bytes) {
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ssize_t toslen = 0;
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socklen_t tolen = sizeof(struct sockaddr);
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if ((toslen = ::sendto(socket_, data, n_bytes, 0, (struct sockaddr *)&sockAddr_, tolen)) ==
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-1) {
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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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