资源简介
windows 中没有提供给我们可用的netstat -an 的源码,本人利用C++的函数实现了这一功能……
代码片段和文件信息
#define WIN32_LEAN_AND_MEAN
#include
#include
#include
#include
#include
#include
#include
#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};
//获得pTcpTable所需要的真实长度dwSize
if (GetTcpTable(pTcpTable &dwSize TRUE) == ERROR_INSUFFICIENT_BUFFER)
{
pTcpTable = (MIB_TCPTABLE*) malloc ((UINT) dwSize);
}
else
return dwRetVal;
printf(“Active Connections\n\n“);
printf(“ Proto\t%-24s%-24s%s\n““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;
//监听端口,远程主机端口为0,但函数返回是有值的,不知道它是怎么考虑的
if (pTcpTable->table[i].dwState == MIB_TCP_STATE_LISTEN)
pTcpTable->table[i].dwRemotePort = 0;
//dwLocalPort,dwRemotePort 是网络字节
_snprintf(szlipsizeof(szlip)“%s:%d“inet_ntoa(lip)htons((u_short)pTcpTable->table[i].dwLocalPort));
_snprintf(szripsizeof(szrip)“%s:%d“inet_ntoa(rip)htons((u_short)pTcpTable->table[i].dwRemotePort));
printf(“ TCP\t%-24s%-24s%s\n“szlipszripTcpState[pTcpTable->table[i].dwState]);
}
}
else
{
printf(“\tCall to GetTcpTable failed.\n“);
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;
}
DWORD EnumUDPTable()
{
PMIB_UDPTABLE pUdpTable = NULL;
DWORD dwSize = 0;
DWORD dwRetVal = ERROR_SUCCESS;
// struct in_addr rip;
struct in_addr lip;
// char szrip[32] = {0};
char szlip[32] = {0};
//获得pUdpTable所需要的真实长度dwSize
if (GetUdpTable(pUdpTable &dwSize TRUE) == ERROR_INSU
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