Some question aboout GetPerTcpConnectionEStats(),it dose not work correctly

[EDN Admin]

Hi!I am working with Microsoft Visual studio 2010,OS is Win7.I want to us
GetPerTcpConnectionEStats() to get my computers net flow.The GetPerTcpConnectionEStats() function is defined on Windows Vista and later. When I use this API,each net connections net flow are all the same.
Here is my code,thanks!
#include "stdafx.h"<br/>
#include <winsock2.h><br/>
#include <Windows.h><br/>
#include <ws2tcpip.h><br/>
#include <iphlpapi.h><br/>
#include <tcpestats.h><br/>
#include <stdlib.h><br/>
#include <stdio.h>
#pragma comment(lib, "iphlpapi.lib")<br/>
#pragma comment(lib, "ws2_32.lib")
#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))<br/>
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
/* Note: could also use malloc() and free() */
<br/>
int _tmain(int argc, _TCHAR* argv[])<br/>
{<br/>
// Declare and initialize variables<br/>
PMIB_TCPTABLE pTcpTable;<br/>
PMIB_TCPROW row;<br/>
DWORD dwSize = 0;<br/>
DWORD dwRetVal = 0;
char szLocalAddr[128];<br/>
char szRemoteAddr[128];
ULONG rosSize=0,rodSize=0;<br/>
ULONG winStatus;<br/>
PUCHAR ros=NULL,rod=NULL;
PTCP_ESTATS_DATA_ROD_v0 dataRod = {0};
struct in_addr IpAddr;
int i;
pTcpTable = (MIB_TCPTABLE *) MALLOC(sizeof (MIB_TCPTABLE));<br/>
if (pTcpTable == NULL) {<br/>
printf("Error allocating memoryn");<br/>
return 1;<br/>
}
dwSize = sizeof (MIB_TCPTABLE);<br/>
rodSize=sizeof(TCP_ESTATS_DATA_ROD_v0);
// Make an initial call to GetTcpTable to<br/>
// get the necessary size into the dwSize variable<br/>
if ((dwRetVal = GetExtendedTcpTable(pTcpTable, &dwSize,TRUE,AF_INET,TCP_TABLE_BASIC_ALL,0)) ==<br/>
ERROR_INSUFFICIENT_BUFFER) {<br/>
FREE(pTcpTable);<br/>
pTcpTable = (MIB_TCPTABLE *) MALLOC(dwSize);<br/>
if (pTcpTable == NULL) {<br/>
printf("Error allocating memoryn");<br/>
return 1;<br/>
}<br/>
}<br/>
// Make a second call to GetTcpTable to get<br/>
// the actual data we require<br/>
if ((dwRetVal = GetExtendedTcpTable(pTcpTable, &dwSize,TRUE,AF_INET,TCP_TABLE_BASIC_ALL,0)) == NO_ERROR) {<br/>
row=pTcpTable->table;<br/>
printf("tNumber of entries: %dn", (int) pTcpTable->dwNumEntries);<br/>
for (i = 0; i < (int) pTcpTable->dwNumEntries; i++) {<br/>
printf("ntTCP[%d] State: %ld - ", i,<br/>
pTcpTable->table.dwState);<br/>
switch (pTcpTable->table.dwState) {<br/>
case MIB_TCP_STATE_CLOSED:<br/>
printf("CLOSEDn");<br/>
break;<br/>
case MIB_TCP_STATE_LISTEN:<br/>
printf("LISTENn");<br/>
break;<br/>
case MIB_TCP_STATE_SYN_SENT:<br/>
printf("SYN-SENTn");<br/>
break;<br/>
case MIB_TCP_STATE_SYN_RCVD:<br/>
printf("SYN-RECEIVEDn");<br/>
break;<br/>
case MIB_TCP_STATE_ESTAB:<br/>
printf("ESTABLISHEDn");<br/>
break;<br/>
case MIB_TCP_STATE_FIN_WAIT1:<br/>
printf("FIN-WAIT-1n");<br/>
break;<br/>
case MIB_TCP_STATE_FIN_WAIT2:<br/>
printf("FIN-WAIT-2 n");<br/>
break;<br/>
case MIB_TCP_STATE_CLOSE_WAIT:<br/>
printf("CLOSE-WAITn");<br/>
break;<br/>
case MIB_TCP_STATE_CLOSING:<br/>
printf("CLOSINGn");<br/>
break;<br/>
case MIB_TCP_STATE_LAST_ACK:<br/>
printf("LAST-ACKn");<br/>
break;<br/>
case MIB_TCP_STATE_TIME_WAIT:<br/>
printf("TIME-WAITn");<br/>
break;<br/>
case MIB_TCP_STATE_DELETE_TCB:<br/>
printf("DELETE-TCBn");<br/>
break;<br/>
default:<br/>
printf("UNKNOWN dwState valuen");<br/>
break;<br/>
}
IpAddr.S_un.S_addr = (u_long) pTcpTable->table.dwLocalAddr;<br/>
strcpy_s(szLocalAddr, sizeof (szLocalAddr), inet_ntoa(IpAddr));<br/>
printf("tTCP[%d] Local Addr: %sn", i, szLocalAddr);<br/>
printf("tTCP[%d] Local Port: %d n", i,<br/>
ntohs((u_short)pTcpTable->table.dwLocalPort));
IpAddr.S_un.S_addr = (u_long) pTcpTable->table.dwRemoteAddr;<br/>
strcpy_s(szRemoteAddr, sizeof (szRemoteAddr), inet_ntoa(IpAddr));<br/>
printf("tTCP[%d] Remote Addr: %sn", i, szRemoteAddr);<br/>
printf("tTCP[%d] Remote Port: %dn", i,<br/>
ntohs((u_short)pTcpTable->table.dwRemotePort));<br/>
<br/>
if(rodSize!=0){<br/>
rod=(PUCHAR)malloc(rodSize);<br/>
if(rod==NULL){<br/>
printf("Out of Memory");<br/>
}<br/>
}
winStatus = GetPerTcpConnectionEStats(row,TcpConnectionEstatsData,NULL,0,0,NULL,0,0,rod,0,rodSize);
if(winStatus==NO_ERROR)<br/>
{<br/>
dataRod = (PTCP_ESTATS_DATA_ROD_v0) rod;<br/>
printf("tDatan");<br/>
printf("tBytes Out: %lun",dataRod->DataBytesOut);<br/>
printf("tBytes In : %lun",dataRod->DataBytesIn);<br/>
}<br/>
++row;<br/>
}<br/>
} else {<br/>
printf("tGetTcpTable failed with %dn", dwRetVal);<br/>
FREE(pTcpTable);<br/>
return 1;<br/>
}
if (pTcpTable != NULL) {<br/>
FREE(pTcpTable);<br/>
pTcpTable = NULL;<br/>
}
system("PAUSE");<br/>
return 0;<br/>
}

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