} TCPHeader, *PTCPHeader;</p><p>typedef struct _UDPHeader
{
USHORT sourcePort; // 源端口号
USHORT destinationPort;// 目的端口号
USHORT len; // 封包长度
USHORT checksum; // 校验和
} UDPHeader, *PUDPHeader;</p><p>#endif // __PROTOINFO_H__
</p>#include <stdio.h>
#include <windows.h>
#include <Iphlpapi.h>
#pragma comment(lib, "Iphlpapi.lib")
#pragma comment(lib, "WS2_32.lib")
PMIB_TCPTABLE MyGetTcpTable(BOOL bOrder);
PMIB_UDPTABLE MyGetUdpTable(BOOL bOrder);
void MyFreeTcpTable(PMIB_TCPTABLE pTcpTable);
void MyFreeUdpTable(PMIB_UDPTABLE pUdpTable);
int main()
{
// 打印TCP连接表信息
PMIB_TCPTABLE pTcpTable = MyGetTcpTable(TRUE);
if(pTcpTable != NULL)
{
char strState[128];
struct in_addr inadLocal, inadRemote;
DWORD dwRemotePort = 0;
char szLocalIp[128];
char szRemIp[128];
printf("TCP TABLE\n");
printf("%20s %10s %20s %10s %s\n", "Loc Addr", "Loc Port", "Rem Addr",
"Rem Port", "State");
for(UINT i = 0; i < pTcpTable->dwNumEntries; ++i)
{
// 状态
switch (pTcpTable->table[i].dwState)
{
case MIB_TCP_STATE_CLOSED:
strcpy(strState, "CLOSED");
break;
case MIB_TCP_STATE_TIME_WAIT:
strcpy(strState, "TIME_WAIT");
break;
case MIB_TCP_STATE_LAST_ACK:
strcpy(strState, "LAST_ACK");
break;
case MIB_TCP_STATE_CLOSING:
strcpy(strState, "CLOSING");
break;
case MIB_TCP_STATE_CLOSE_WAIT:
strcpy(strState, "CLOSE_WAIT");
break;
case MIB_TCP_STATE_FIN_WAIT1:
strcpy(strState, "FIN_WAIT1");
break;
case MIB_TCP_STATE_ESTAB:
strcpy(strState, "ESTAB");
break;
case MIB_TCP_STATE_SYN_RCVD:
strcpy(strState, "SYN_RCVD");
break;
case MIB_TCP_STATE_SYN_SENT:
strcpy(strState, "SYN_SENT");
break;
case MIB_TCP_STATE_LISTEN:
strcpy(strState, "LISTEN");
break;
case MIB_TCP_STATE_DELETE_TCB:
strcpy(strState, "DELETE");
break;
default:
printf("Error: unknown state!\n");
break;
}
// 本地地址
inadLocal.s_addr = pTcpTable->table[i].dwLocalAddr;
// 远程端口
if (strcmp(strState, "LISTEN") != 0)
{
dwRemotePort = pTcpTable->table[i].dwRemotePort;
}
else
dwRemotePort = 0;
// 远程IP地址
inadRemote.s_addr = pTcpTable->table[i].dwRemoteAddr;
strcpy(szLocalIp, inet_ntoa(inadLocal));
strcpy(szRemIp, inet_ntoa(inadRemote));
printf("%20s %10u %20s %10u %s\n",
szLocalIp, ntohs((unsigned short)(0x0000FFFF & pTcpTable->table[i].dwLocalPort)),
szRemIp, ntohs((unsigned short)(0x0000FFFF & dwRemotePort)),
strState);
}
MyFreeTcpTable(pTcpTable);
}
printf(" \n\n");