79 строки
1.8 KiB
C++
79 строки
1.8 KiB
C++
// Copyright (c) Microsoft Corporation
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// SPDX-License-Identifier: MIT
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#include <WinSock2.h>
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#include <iostream>
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#include <thread>
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#include <vector>
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#include <ws2tcpip.h>
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#pragma comment(lib, "ws2_32.lib")
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int
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main(int argc, const char** argv)
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{
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WSAData data;
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if (argc != 2) {
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printf("Usage: %s target_ip\n", argv[0]);
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return 1;
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}
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if (WSAStartup(2, &data) != 0) {
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printf("WSAStartup failed\n");
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return 1;
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}
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unsigned short us = 0x1234;
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us = us >> 8 | us << 8;
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printf("%.2X\n", us);
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Sleep(10000);
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auto socket = WSASocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, nullptr, 0, 0);
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if (socket == INVALID_SOCKET) {
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printf("WSASocket failed\n");
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return 1;
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}
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ADDRINFOA* addrinfo = nullptr;
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if (getaddrinfo(argv[1], "53", nullptr, &addrinfo) != 0) {
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printf("getaddrinfo failed \n");
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return 1;
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}
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if (connect(socket, addrinfo->ai_addr, static_cast<int>(addrinfo->ai_addrlen)) != 0) {
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printf("connect failed \n");
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return 1;
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}
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std::vector<WSABUF> buffers(1024);
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char a = 'A';
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for (auto& b : buffers) {
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b.buf = &a;
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b.len = 0;
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}
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DWORD bytes_sent;
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volatile long packet_sent = 0;
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std::vector<std::thread> threads(4);
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for (auto& t : threads) {
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t = std::thread([&] {
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for (;;) {
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if (WSASend(
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socket, buffers.data(), static_cast<DWORD>(buffers.size()), &bytes_sent, 0, nullptr, nullptr) !=
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0) {
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printf("WSASend failed\n");
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return 1;
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}
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InterlockedAdd(&packet_sent, static_cast<long>(buffers.size()));
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}
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});
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}
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for (;;) {
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long old = packet_sent;
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Sleep(1000);
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printf("%d\n", packet_sent - old);
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}
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}
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