#include "Winsock2.h"
#include "Iphlpapi.h"
#include <malloc.h>
#include <stdlib.h>
#include <stdio.h>
#pragma comment(lib, "Iphlpapi.lib")
#pragma comment(lib, "ws2_32.lib")
static char TcpState[][32] =
{
"???",
"CLOSED",
"LISTENING",
"SYN_SENT",
"SEN_RECEIVED",
"ESTABLISHED",
"FIN_WAIT",
"FIN_WAIT2",
"CLOSE_WAIT",
"CLOSING",
"LAST_ACK",
"TIME_WAIT"
};
DWORD EnumTCPTable()
{
PMIB_TCPTABLE pTcpTable = NULL;
DWORD dwSize = 0;
DWORD dwRetVal = ERROR_SUCCESS;
struct in_addr rip;
struct in_addr lip;
char szrip[32] = {0};
char szlip[32] = {0};
// pTcpTable ,dwSize
if (GetTcpTable(pTcpTable, &dwSize, TRUE) == ERROR_INSUFFICIENT_BUFFER)
{
pTcpTable = (MIB_TCPTABLE*) malloc ((UINT) dwSize);
}
else
return dwRetVal;
printf("Active Connections
");
printf(" Proto\t%-24s%-24s%s
","Local Address","Foreign Address","State");
if ((dwRetVal = GetTcpTable(pTcpTable, &dwSize, TRUE)) == NO_ERROR)
{
for (int i = 0; i < (int) pTcpTable->dwNumEntries; i++)
{
rip.S_un.S_addr = pTcpTable->table[i].dwRemoteAddr;
lip.S_un.S_addr = pTcpTable->table[i].dwLocalAddr;
// , 0, ,
if (pTcpTable->table[i].dwState == MIB_TCP_STATE_LISTEN)
pTcpTable->table[i].dwRemotePort = 0;
//dwLocalPort,dwRemotePort
_snprintf(szlip,sizeof(szlip),"%s:%d",inet_ntoa(lip),htons((u_short)pTcpTable->table[i].dwLocalPort));
_snprintf(szrip,sizeof(szrip),"%s:%d",inet_ntoa(rip),htons((u_short)pTcpTable->table[i].dwRemotePort));
printf(" TCP\t%-24s%-24s%s
",szlip,szrip,TcpState[pTcpTable->table[i].dwState]);
}
}
else
{
printf("\tCall to GetTcpTable failed.
");
LPVOID lpMsgBuf;
if (FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dwRetVal,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL ))
{
printf("\tError: %s", lpMsgBuf);
}
LocalFree( lpMsgBuf );
}
GlobalFree(pTcpTable);
return dwRetVal;
}
void main()
{
EnumTCPTable();
}