Windows下c++获取网卡的下行流量、丢包率、错包率

Question

我想实时获取Windows网卡的下行流量、丢包率、错包率的信息，用c/c++语言

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <windows.h>
#include <netioapi.h>
#include <locale.h>
#include <inttypes.h>

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

void show_row(PMIB_IF_ROW2 row){
    if(!row->InterfaceAndOperStatusFlags.HardwareInterface)return;
    if(!row->InterfaceAndOperStatusFlags.ConnectorPresent)return;
    wprintf(L"%ls\n", row->Alias);
    wprintf(L"接收字节数 %"PRIu64"\n", row->InUcastOctets);
    wprintf(L"发送字节数 %"PRIu64"\n", row->OutUcastOctets);
    wprintf(L"接收单播包数 %"PRIu64"\n", row->InUcastPkts);
    wprintf(L"发送单播包数 %"PRIu64"\n", row->OutUcastPkts);
    wprintf(L"接收多播包数 %"PRIu64"\n", row->InNUcastPkts);
    wprintf(L"发送多播包数 %"PRIu64"\n", row->OutNUcastPkts);
    wprintf(L"接收错误包数 %"PRIu64"\n", row->InErrors);    
    wprintf(L"发送错误包数 %"PRIu64"\n", row->OutErrors);
    wprintf(L"接收丢包数 %"PRIu64"\n", row->InDiscards);    
    wprintf(L"发送丢包数 %"PRIu64"\n", row->OutDiscards);

    ULONG64 error = row->InErrors + row->OutErrors;
    ULONG64 discard = row->InDiscards + row->OutDiscards;
    ULONG64 total = row->InUcastPkts + row->OutUcastPkts + row->InNUcastPkts + row->OutNUcastPkts + error + discard;
    double error_rate = total?((double)error / (double)total):0;
    double discard_rate = total?((double)discard / (double)total):0;
    
    wprintf(L"错误率 %.4f\n", error_rate);
    wprintf(L"丢包率 %.4f\n", discard_rate);
    printf("\n");
}

void show_table(PMIB_IF_TABLE2 table){
    int i;
    PMIB_IF_ROW2 row;
    for (i = 0; i < table->NumEntries; i++){
        row = &table->Table[i];
        show_row(row);
    }
}

void get_if_status(){
    PMIB_IF_TABLE2 table;
    if(0 == GetIfTable2Ex(MibIfTableNormal, &table)){
        show_table(table);
        FreeMibTable(table);
    }else{
        printf("GetIfTable2Ex fail %d\n", (int)GetLastError());
    }
}

int main(){
    setlocale(0,"");
    while(1){
        get_if_status();        
        Sleep(2000);
        system("cls");
    }
    return 0;
}