我在写文件传送的过程中,必须先给对方发自己的IP地址
开始,我直接用Winsock的localip,是可以的
但后来,有一台机上测试,不能通过
分析后发现,原来localip获取的IP不是他网卡的IP
而是他机上一个虚拟的IP,该虚拟网卡使用自动ip方式
请问,有没有什么方法区分,一个网卡是物理上的网卡还是虚拟网卡?
今天看了很多总用API方式获取IP的例子,我经过测试
发现,还是没办法区分那个IP到哪个IP
也就是说,我不能获取我需要的IP
开始,我直接用Winsock的localip,是可以的
但后来,有一台机上测试,不能通过
分析后发现,原来localip获取的IP不是他网卡的IP
而是他机上一个虚拟的IP,该虚拟网卡使用自动ip方式
请问,有没有什么方法区分,一个网卡是物理上的网卡还是虚拟网卡?
今天看了很多总用API方式获取IP的例子,我经过测试
发现,还是没办法区分那个IP到哪个IP
也就是说,我不能获取我需要的IP
我使用多网卡处理方法,把所有的ip地址都找了出来
如何判断哪个ip才是虚拟网卡的ip地址呢?
有一种方法是把所有的ip列出来,给用户自己来选择
我用vpn,它本身也有ip地址
Private Const MAX_ADAPTER_DESCRIPTION_LENGTH As Long = 128
Private Const MAX_ADAPTER_ADDRESS_LENGTH As Long = 8
Private Const ERROR_SUCCESS As Long = 0Private Type IP_ADDRESS_STRING
IpAddr(0 To 15) As Byte
End TypePrivate Type IP_MASK_STRING
IpMask(0 To 15) As Byte
End TypePrivate Type IP_ADDR_STRING
dwNext As Long
IpAddress As IP_ADDRESS_STRING
IpMask As IP_MASK_STRING
dwContext As Long
End TypePrivate Type IP_ADAPTER_INFO
dwNext As Long
ComboIndex As Long '保留
sAdapterName(0 To (MAX_ADAPTER_NAME_LENGTH + 3)) As Byte
sDescription(0 To (MAX_ADAPTER_DESCRIPTION_LENGTH + 3)) As Byte
dwAddressLength As Long
sIPAddress(0 To (MAX_ADAPTER_ADDRESS_LENGTH - 1)) As Byte
dwIndex As Long
uType As Long
uDhcpEnabled As Long
CurrentIpAddress As Long
IpAddressList As IP_ADDR_STRING
GatewayList As IP_ADDR_STRING
DhcpServer As IP_ADDR_STRING
bHaveWins As Long
PrimaryWinsServer As IP_ADDR_STRING
SecondaryWinsServer As IP_ADDR_STRING
LeaseObtained As Long
LeaseExpires As Long
End Type
Private Const NCBASTAT = &H33
Private Const NCBNAMSZ = 16
Private Const HEAP_ZERO_MEMORY = &H8
Private Const HEAP_GENERATE_EXCEPTIONS = &H4
Private Const NCBRESET = &H32Private Type 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 TypePrivate 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 TypePrivate Type NAME_BUFFER
Name As String * NCBNAMSZ
name_num As Integer
name_flags As Integer
End TypePrivate Type ASTAT
adapt As ADAPTER_STATUS
NameBuff(30) As NAME_BUFFER
End TypePrivate Declare Function GetAdaptersInfo Lib "iphlpapi.dll" (pTcpTable As Any, pdwSize As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (dst As Any, src As Any, ByVal bcount As Long)
Private Declare Function Netbios Lib "netapi32.dll" (pncb As NCB) As Byte
Private Declare Function GetProcessHeap Lib "kernel32" () As Long
Private Declare Function HeapAlloc Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As LongPublic Function EthernetAddress(LanaNumber As Long) _
As String Dim udtNCB As NCB
Dim bytResponse As Byte
Dim udtASTAT As ASTAT
Dim udtTempASTAT As ASTAT
Dim lngASTAT As Long
Dim strOut As String
Dim x As Integer udtNCB.ncb_command = NCBRESET
bytResponse = Netbios(udtNCB)
udtNCB.ncb_command = NCBASTAT
udtNCB.ncb_lana_num = LanaNumber
udtNCB.ncb_callname = "* "
udtNCB.ncb_length = Len(udtASTAT)
lngASTAT = HeapAlloc(GetProcessHeap(), _
HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, udtNCB.ncb_length) strOut = ""
If lngASTAT Then
udtNCB.ncb_buffer = lngASTAT
bytResponse = Netbios(udtNCB)
CopyMemory udtASTAT, udtNCB.ncb_buffer, Len(udtASTAT)
With udtASTAT.adapt
For x = 0 To 5
strOut = strOut & Right$("00" & Hex$(.adapter_address(x)), 2)
Next x
End With
HeapFree GetProcessHeap(), 0, lngASTAT
End If
EthernetAddress = strOut
End Function Public Function LocalIPAddress() As String
Dim cbRequired As Long
Dim buff() As Byte
Dim Adapter As IP_ADAPTER_INFO
Dim AdapterStr As IP_ADDR_STRING
Dim ptr1 As Long
Dim sIPAddr As String
Dim found As Boolean
Dim iFound As Integer
iFound = 0
sIPAddr = ""
Dim sReturn As String
sReturn = ""
Call GetAdaptersInfo(ByVal 0&, cbRequired)
If cbRequired > 0 Then
ReDim buff(0 To cbRequired - 1) As Byte
If GetAdaptersInfo(buff(0), cbRequired) = ERROR_SUCCESS Then
'获取存放在buff()中的数据的指针
ptr1 = VarPtr(buff(0))
Do While (ptr1 <> 0)
'将第一个网卡的数据转换到IP_ADAPTER_INFO结构中
CopyMemory Adapter, ByVal ptr1, LenB(Adapter)
With Adapter
'IpAddress.IpAddr成员给出了DHCP的IP地址
sIPAddr = TrimNull(StrConv(.IpAddressList.IpAddress.IpAddr, vbUnicode))
If Len(sIPAddr) > 0 Then
iFound = iFound + 1
sReturn = sReturn & "第" & iFound & "个网卡的iP是:" & sIPAddr & vbCrLf
found = True
' Exit Do
End If
ptr1 = .dwNext
End With 'With Adapter
'不再有网卡时,ptr1的值为0
Loop 'Do While (ptr1 <> 0)
End If 'If GetAdaptersInfo
End If 'If cbRequired > 0
'返回结果字符串
LocalIPAddress = sReturn
End FunctionFunction TrimNull(item As String)
Dim pos As Integer
pos = InStr(item, Chr$(0))
If pos Then
TrimNull = Left$(item, pos - 1)
Else: TrimNull = item
End If
End Function