获取系统系统所有TCP以及UDP端口使用情况

GetTcpTable

GetTcpTable

The GetTcpTable function retrieves the TCP connection table.

DWORD GetTcpTable(  PMIB_TCPTABLE pTcpTable,  // buffer for the connection table  PDWORD pdwSize,           // size of the buffer  BOOL bOrder               // sort the table?);

Parameters

pTcpTable

[out] Pointer to a buffer that receives the TCP connection table as a MIB_TCPTABLE structure.

pdwSize

[in, out] On input, specifies the size of the buffer pointed to by the pTcpTable parameter.

On output, if the buffer is not large enough to hold the returned connection table, the function sets this parameter equal to the required buffer size.

bOrder

[in] Specifies whether the connection table should be sorted. If this parameter is TRUE, the table is sorted in the order of:

1. Local IP address
2. Local port
3. Remote IP address
4. Remote port

Return Values

If the function succeeds, the return value is NO_ERROR.

If the function fails, use FormatMessage to obtain the message string for the returned error.

Requirements

  Windows NT/2000 or later: Requires Windows NT 4.0 SP4 or later.
  Windows 95/98/Me: Requires Windows 98 or later.
  Header: Declared in Iphlpapi.h.
  Library: Use Iphlpapi.lib.

 

 

MIB_TCPTABLE

MIB_TCPTABLE

The MIB_TCPTABLE structure contains a table of TCP connections.

typedef struct _MIB_TCPTABLE {  DWORD      dwNumEntries;    // number of entries in the table   MIB_TCPROW table[ANY_SIZE]; // array of TCP connections } MIB_TCPTABLE, *PMIB_TCPTABLE;

Members

dwNumEntries

Specifies the number of entries in the table.

table[ANY_SIZE]

Pointer to a table of TCP connections implemented as an array of MIB_TCPROW structures.

MIB_TCPROW

MIB_TCPROW

The MIB_TCPROW structure contains information for a TCP connection.

typedef struct _MIB_TCPROW {  DWORD   dwState;        // state of the connection  DWORD   dwLocalAddr;    // address on local computer  DWORD   dwLocalPort;    // port number on local computer  DWORD   dwRemoteAddr;   // address on remote computer  DWORD   dwRemotePort;   // port number on remote computer} MIB_TCPROW, *PMIB_TCPROW;

Members

dwState

Specifies the state of the TCP connection. This member can have one of the following values. ValueDescriptionMIB_TCP_STATE_CLOSEDTo be determined. MIB_TCP_STATE_LISTENTo be determined. MIB_TCP_STATE_SYN_SENTTo be determined. MIB_TCP_STATE_SYN_RCVDTo be determined. MIB_TCP_STATE_ESTABTo be determined. MIB_TCP_STATE_FIN_WAIT1To be determined. MIB_TCP_STATE_FIN_WAIT2To be determined. MIB_TCP_STATE_CLOSE_WAITTo be determined. MIB_TCP_STATE_CLOSINGTo be determined. MIB_TCP_STATE_LAST_ACKTo be determined. MIB_TCP_STATE_TIME_WAITTo be determined. MIB_TCP_STATE_DELETE_TCBTransmission Control Block (TCB) deleted.

dwLocalAddr

Specifies the address for the connection on the local computer.

dwLocalPort

Specifies the port number for the connection on the local computer.

dwRemoteAddr

Specifies the address for the connection on the remote computer.

dwRemotePort

Specifies the port number the connection on the remote computer.

GetUdpTable

GetUdpTable

The GetUdpTable function retrieves the User Datagram Protocol (UDP) listener table.

DWORD GetUdpTable(  PMIB_UDPTABLE pUdpTable,  // buffer for the listener table   PDWORD pdwSize,           // size of buffer  BOOL bOrder               // sort the table?);

Parameters

pUdpTable

[out] Pointer to a buffer that receives the UDP listener table as a MIB_UDPTABLE structure.

pdwSize

[in, out] On input, specifies the size of the buffer pointed to by the pUdpTable parameter.

On output, if the buffer is not large enough to hold the returned listener table, the function sets this parameter equal to the required buffer size.

bOrder

[in] Specifies whether the returned table should be sorted. If this parameter is TRUE, the table is sorted in the order of:

1. IP address
2. Port

Return Values

If the function succeeds, the return value is NO_ERROR.

If the function fails, use FormatMessage to obtain the message string for the returned error.

Requirements

  Windows NT/2000 or later: Requires Windows NT 4.0 SP4 or later.
  Windows 95/98/Me: Requires Windows 98 or later.
  Header: Declared in Iphlpapi.h.
  Library: Use Iphlpapi.lib.

 

MIB_UDPTABLE

MIB_UDPTABLE

The MIB_UDPTABLE structure contains a table of MIB_UDPROW structures.

typedef struct _MIB_UDPTABLE {  DWORD       dwNumEntries;    // number of entries in the table  MIB_UDPROW  table[ANY_SIZE]; // table of MIB_UDPROW structs} MIB_UDPTABLE, *PMIB_UDPTABLE;

Members

dwNumEntries

Specifies the number of entries in the table.

table[ANY_SIZE]

Pointer to an array of MIB_UDPROW structures.

MIB_UDPROW

MIB_UDPROW

The MIB_UDPROW structure contains address information for sending and receiving User Datagram Protocol (UDP) datagrams.

typedef struct _MIB_UDPROW {  DWORD   dwLocalAddr;    // IP address on local computer  DWORD   dwLocalPort;    // port number on local computer} MIB_UDPROW, *PMIB_UDPROW;

Members

dwLocalAddr

Specifies the IP address on the local computer.

dwLocalPort

Specifies the port number on the local computer.