Winsock控件如何获得连接者的MAC地址
控件只提供对方的IP和计算机名，那么MAC地址如何得到。
为了识别用户的身份，同一台客户机电脑连接服务程序A，之后断开A连接程序B。那么A要记住客户端的身份，方便B来查询。
而很多电脑是通过共享IP上网，GHOST的系统计算机名有可能很多都相同。那么区分电脑身份的特征还有一个就是MAC地址。
据查Winsock控件是会发送MAC信息的，但如何才能得到。或者说谁有其它办法来识别对方计算机的唯一身份。
[解决办法]
Option Explicit Public Const NCBASTAT As Long = &H33 Public Const NCBNAMSZ As Long = 16 Public Const HEAP_ZERO_MEMORY As Long = &H8 Public Const HEAP_GENERATE_EXCEPTIONS As Long = &H4 Public Const NCBRESET As Long = &H32 Public Type NET_CONTROL_BLOCK 'NCB ncb_command As Byte ncb_retcode As Byte ncb_lsn As Byte ncb_num As Byte ncb_buffer As Long ncb_length As Integer ncb_callname As String * NCBNAMSZ ncb_name As String * NCBNAMSZ ncb_rto As Byte ncb_sto As Byte ncb_post As Long ncb_lana_num As Byte ncb_cmd_cplt As Byte ncb_reserve(9) As Byte ' Reserved, must be 0 ncb_event As Long End Type Public Type ADAPTER_STATUS adapter_address(5) As Byte rev_major As Byte reserved0 As Byte adapter_type As Byte rev_minor As Byte duration As Integer frmr_recv As Integer frmr_xmit As Integer iframe_recv_err As Integer xmit_aborts As Integer xmit_success As Long recv_success As Long iframe_xmit_err As Integer recv_buff_unavail As Integer t1_timeouts As Integer ti_timeouts As Integer Reserved1 As Long free_ncbs As Integer max_cfg_ncbs As Integer max_ncbs As Integer xmit_buf_unavail As Integer max_dgram_size As Integer pending_sess As Integer max_cfg_sess As Integer max_sess As Integer max_sess_pkt_size As Integer name_count As Integer End Type Public Type NAME_BUFFER name As String * NCBNAMSZ name_num As Integer name_flags As Integer End Type Public Type ASTAT adapt As ADAPTER_STATUS NameBuff(30) As NAME_BUFFER End Type Public Declare Function Netbios Lib "netapi32.dll " (pncb As NET_CONTROL_BLOCK) As Byte Public Declare Sub CopyMemory Lib "kernel32 " Alias "RtlMoveMemory " (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long) Public Declare Function GetProcessHeap Lib "kernel32 " () As Long Public Declare Function HeapAlloc Lib "kernel32 " (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long Public Declare Function HeapFree Lib "kernel32 " (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As Long Public Function GetMACAddress() As String 'retrieve the MAC Address for the network controller 'installed, returning a formatted string Dim tmp As String Dim pASTAT As Long Dim NCB As NET_CONTROL_BLOCK Dim AST As ASTAT 'The IBM NetBIOS 3.0 specifications defines four basic 'NetBIOS environments under the NCBRESET command. Win32 'follows the OS/2 Dynamic Link Routine (DLR) environment. 'This means that the first NCB issued by an application 'must be a NCBRESET, with the exception of NCBENUM. 'The Windows NT implementation differs from the IBM 'NetBIOS 3.0 specifications in the NCB_CALLNAME field. NCB.ncb_command = NCBRESET Call Netbios(NCB) 'To get the Media Access Control (MAC) address for an 'ethernet adapter programmatically, use the Netbios() 'NCBASTAT command and provide a "* " as the name in the 'NCB.ncb_CallName field (in a 16-chr string). NCB.ncb_callname = "* " NCB.ncb_command = NCBASTAT 'For machines with multiple network adapters you need to 'enumerate the LANA numbers and perform the NCBASTAT 'command on each. Even when you have a single network 'adapter, it is a good idea to enumerate valid LANA numbers 'first and perform the NCBASTAT on one of the valid LANA 'numbers. It is considered bad programming to hardcode the 'LANA number to 0 (see the comments section below). NCB.ncb_lana_num = 0 NCB.ncb_length = Len(AST) pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS _ Or HEAP_ZERO_MEMORY, NCB.ncb_length) If pASTAT = 0 Then Debug.Print "memory allocation failed! " Exit Function End If NCB.ncb_buffer = pASTAT Call Netbios(NCB) CopyMemory AST, NCB.ncb_buffer, Len(AST) tmp = Format$(Hex(AST.adapt.adapter_address(0)), "00 ") & " " & _ Format$(Hex(AST.adapt.adapter_address(1)), "00 ") & " " & _ Format$(Hex(AST.adapt.adapter_address(2)), "00 ") & " " & _ Format$(Hex(AST.adapt.adapter_address(3)), "00 ") & " " & _ Format$(Hex(AST.adapt.adapter_address(4)), "00 ") & " " & _ Format$(Hex(AST.adapt.adapter_address(5)), "00 ") HeapFree GetProcessHeap(), 0, pASTAT GetMACAddress = tmp End Function
[解决办法]
WinSock中不能得到MAC地址信息,但你可以要求对方得到后,发给你,得到mac地址用netbios.
你可以参考《WinSock网络编程经络》第21章，这里有得mac地址的程序,解压后找BootpClnt->bootp_get_mac_addr().
下载地址：http://download.csdn.net/detail/geoff08zhang/4571358
[解决办法]
winsock 控件内无获取 mac 地址的方法 只能 通过客户端 传递给服务器 不能 用控件直接获得
