tcp服務端監聽埠長時間后會失效-有解無憂

用的是阿里云的服務器，這個問題我不是第一次發現了，這個周期長的時候幾個月一次，短的話也是最少一個月，不單單是我自己的服務端，微軟的netsh，也是長時間后會失效，有人遇到過這種問題嗎？

uj5u.com熱心網友回復：

阿里云服務器用的淘寶假貨

uj5u.com熱心網友回復：

可以看看系統日志syslog，或者找阿里云客服

uj5u.com熱心網友回復：

正常來講，不會出現這種情況。
如果出現了這種情況，建議寫個超時啟機制。

uj5u.com熱心網友回復：

十有八九和這個API有關：
GetTickCount
The GetTickCount function retrieves the number of milliseconds that have elapsed since the system was started. It is limited to the resolution of the system timer. If you need a higher resolution timer, use amultimedia timer or a high-resolution timer.

DWORD GetTickCount(VOID)

Parameters
This function has no parameters.

Return Values
The return value is the number of milliseconds that have elapsed since the system was started.

Remarks
The following table describes the resolution of the system timer.

System Resolution
Windows NT 3.5 and later The system timer runs at approximately 10ms.
Windows NT 3.1 The system timer runs at approximately 16ms.
Windows 95 and later The system timer runs at approximately 55ms.

The elapsed time is stored as a DWORD value. Therefore, the time will wrap around to zero if the system is run continuously for 49.7 days.

Windows NT: To obtain the time elapsed since the computer was started, look up the System Up Time counter in the performance data in the registry key HKEY_PERFORMANCE_DATA. The value returned is an 8-byte value.

QuickInfo
  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winbase.h.
  Import Library: Use kernel32.lib.

See Also
Time Overview, Time Functions

僅供參考：

#pragma comment(lib,"ntdll")

#pragma comment(lib,"user32")

#include <afxdisp.h>

#include <windows.h>

#include <winnt.h>

#include <stdio.h>

#include <memory.h>

#include <math.h>

BOOL r;

extern "C" NTSYSAPI NTAPI NtQuerySystemInformation(

    IN  UINT   SystemInformationClass,  // 資訊型別

    OUT PVOID  SystemInformation,       // 緩沖指標

    IN   ULONG SystemInformationLength, // 緩沖的位元組大小

    OUT PULONG ReturnLength OPTIONAL    // 寫入緩沖的位元組數

);

//第一個引數是請求的資訊型別。這個引數可以有許多值。為了得到系統啟動時間，我們只用其中的一個值：SystemTimeInformation（3）。

//如果，第一個引數是SystemTimeInformation，則第二個引數必須是一個SYSTEM_TIME_INFORMATION結構指標。

typedef struct {

    LARGE_INTEGER liKeBootTime;//系統被啟動的時間（以1/10000毫秒計）。

    LARGE_INTEGER liKeSystemTime;

    LARGE_INTEGER liExpTimeZoneBias;

    ULONG         uCurrentTimeZoneId;

    DWORD         dwReserved;

} SYSTEM_TIME_INFORMATION;

SYSTEM_TIME_INFORMATION sti;

ULONG rl;

ULONG tk;

FILETIME ft;

//SYSTEMTIME lt;

//extern "C" ULONGLONG WINAPI GetTickCount64(void);

//ULONGLONG tk64;

ULONGLONG d497;

#define days_of_2_32ms 49.71026962962962962962962962963 //(2^32)/24/60/60/1000=49.71026962962962962962962962963

int main() {

    NtQuerySystemInformation(3,&sti,sizeof(sti),&rl);//3==SystemTimeOfDayInformation

    COleDateTime t,now;

    CString s,fmt="%Y-%m-%d %H:%M:%S";



    memcpy(&ft,&sti.liKeBootTime,sizeof(LARGE_INTEGER));

    t=COleDateTime(ft);

    s=t.Format(fmt);

    printf("                            Boot DateTime: %s\n",s);

    tk=GetTickCount();//The elapsed time is stored as a DWORD value. Therefore, the time will wrap around to zero if the system is run continuously for 49.7 days.

    now=COleDateTime::GetCurrentTime();

    t=now-COleDateTimeSpan((double)tk/86400000.0);

    s=t.Format(fmt);

    printf("Prev GetTickCount() Wrap to Zero DateTime: %s\n",s);

    s=now.Format(fmt);

    printf("     GetTickCount():%08X,Now DateTime: %s\n",tk,s);

    t=now+COleDateTimeSpan((double)(0xFFFFFFFFu-tk)/86400000.0);

    s=t.Format(fmt);

    printf("Next GetTickCount() Wrap to Zero DateTime: %s\n",s);

    return 0;

}