Network IP's

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 11:20 am

Is there any way of ennumerating all the IP's of the computers on a LAN Network? I've seen that it is possible of getting even the computer's name, the logged user name, etc... But how to achieve this?

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 12:36 pm

im not sure if theres a way to get all the ips unless u have a program that u've made running on them;

but if u just want to get all of the computers on a windows workgroup/domain, there is a way to do that

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 12:49 pm

but if u just want to get all of the computers on a windows workgroup/domain, there is a way to do that

That's exactly what i want to do... How can i do this?

I am trying to make a LAN chat software and i need this in order to find the workgroup computers automatically, instead of letting the user add the ip's manually.

[Edit]

Like BorgChat does...

..::Origin::.. · Post by **..::Origin::..** » Sat Sep 23, 2006 1:00 pm

Why not (on the client side) use a script to determine it there then send it to the server?

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 1:08 pm

Inf0Byt3 wrote:I am trying to make a LAN chat software and i need this in order to find the workgroup computers automatically, instead of letting the user add the ip's automatically.

this would be easier to implement by using network broadcasts (udp would be best)

but here is the (modified) code to enumerate netbios names - it wasnt my code originaly, found it somewhere on this forum

Code: Select all

; '============================================================================== 
; '  Network Resource List. 
; '  Enumerate all of the networks and network resources available to the 
; '  current machine. 
; ' converted using http://www.powerbasic.com/support/forums/Forum6/HTML/001494.html 
; '============================================================================== 
#Window_Main = 0 
#Gadget_ListIcon = 0 

Structure NEWNETRESOURCE 
  Scope.l
  Type.l
  DisplayType.l
  Usage.l
  LocalName.s 
  RemoteName.s 
  Comment.s 
  Provider.s 
EndStructure 

NewList ListNETRESOURCE.NEWNETRESOURCE() 

Procedure EnumAll(*nr.NETRESOURCE) 
  tempnr.NETRESOURCE 
  j.l 
  x.l 
  Entries = -1 
  nSize = 16384 
  *Buffer=AllocateMemory(nSize) 
  ec = WNetOpenEnum_(#RESOURCE_GLOBALNET, #RESOURCETYPE_ANY, #RESOURCEUSAGE_CONTAINER, *nr, @hEnum) 
  If hEnum 
      ec = WNetEnumResource_(hEnum, @Entries, *Buffer, @nSize) 
      For x = 1 To Entries 
        j = (x-1) * SizeOf(NETRESOURCE) 
        tempnr\dwScope        = PeekL(*Buffer+j+0) 
        tempnr\dwType         = PeekL(*Buffer+j+4) 
        tempnr\dwDisplayType  = PeekL(*Buffer+j+8) 
        tempnr\dwUsage        = PeekL(*Buffer+j+12) 
        tempnr\lpLocalName    = PeekL(*Buffer+j+16) 
        tempnr\lpRemoteName   = PeekL(*Buffer+j+20) 
        tempnr\lpComment      = PeekL(*Buffer+j+24) 
        tempnr\lpProvider     = PeekL(*Buffer+j+28) 
        AddElement(ListNETRESOURCE()) 
        Select tempnr\dwScope 
          Case #RESOURCE_CONNECTED 
            ListNETRESOURCE()\Scope = #RESOURCE_CONNECTED
          Case #RESOURCE_GLOBALNET 
            ListNETRESOURCE()\Scope = #RESOURCE_GLOBALNET
          Case #RESOURCE_REMEMBERED 
            ListNETRESOURCE()\Scope = #RESOURCE_REMEMBERED
          Default 
            ListNETRESOURCE()\Scope = -100
        EndSelect 
        Select tempnr\dwType 
          Case #RESOURCETYPE_ANY 
            ListNETRESOURCE()\Type = #RESOURCETYPE_ANY
          Case #RESOURCETYPE_DISK 
            ListNETRESOURCE()\Type = #RESOURCETYPE_DISK
          Case #RESOURCETYPE_PRINT 
            ListNETRESOURCE()\Type = #RESOURCETYPE_PRINT
          Default 
            ListNETRESOURCE()\Type = -100
        EndSelect 
        Select tempnr\dwDisplayType 
          Case #RESOURCEDISPLAYTYPE_DOMAIN 
            ListNETRESOURCE()\DisplayType = #RESOURCEDISPLAYTYPE_DOMAIN
          Case #RESOURCEDISPLAYTYPE_GENERIC 
            ListNETRESOURCE()\DisplayType = #RESOURCEDISPLAYTYPE_GENERIC
          Case #RESOURCEDISPLAYTYPE_SERVER 
            ListNETRESOURCE()\DisplayType = #RESOURCEDISPLAYTYPE_SERVER
          Case #RESOURCEDISPLAYTYPE_SHARE 
            ListNETRESOURCE()\DisplayType = #RESOURCEDISPLAYTYPE_SHARE 
          Default 
            ListNETRESOURCE()\DisplayType = -100
        EndSelect 
        Select tempnr\dwUsage 
          Case #RESOURCEUSAGE_CONNECTABLE 
            ListNETRESOURCE()\Usage = #RESOURCEUSAGE_CONNECTABLE
          Case #RESOURCEUSAGE_CONTAINER 
            ListNETRESOURCE()\Usage = #RESOURCEUSAGE_CONTAINER
          Default 
            ListNETRESOURCE()\Usage = -100
        EndSelect 
        If tempnr\lpLocalName 
            ListNETRESOURCE()\LocalName = PeekS(tempnr\lpLocalName) 
          Else 
            ListNETRESOURCE()\LocalName = "" 
        EndIf 
        If tempnr\lpRemoteName 
            ListNETRESOURCE()\RemoteName = PeekS(tempnr\lpRemoteName) 
          Else 
            ListNETRESOURCE()\RemoteName = "" 
        EndIf 
        If tempnr\lpComment 
            ListNETRESOURCE()\Comment = PeekS(tempnr\lpComment) 
        Else 
            ListNETRESOURCE()\Comment = "" 
        EndIf 
        If tempnr\lpProvider 
            ListNETRESOURCE()\Provider = PeekS(tempnr\lpProvider) 
        Else 
            ListNETRESOURCE()\Provider = "" 
        EndIf 
        If (tempnr\dwUsage And #RESOURCEUSAGE_CONTAINER) 
          If tempnr\dwDisplayType = #RESOURCEDISPLAYTYPE_SERVER
          Else
            EnumAll(tempnr)
          EndIf
        EndIf 
      Next 
      WNetCloseEnum_(hEnum) 
      FreeMemory(*Buffer) 
  EndIf 
EndProcedure 

; 
; Main starts here 
; 
  EnumAll(#Null) 
  
  
ForEach listnetresource()
  If listnetresource()\DisplayType = #RESOURCEDISPLAYTYPE_SERVER
  Else
    DeleteElement(listnetresource())
  EndIf
Next



ForEach listnetresource()
  
  Debug listnetresource()\RemoteName
  
Next

if the code is stuffed up by the forum, i will send it via email if ure still interested

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 1:16 pm

Thanks! When i try to run it, it doesn't do anything... Shouldn't it debug stuff??

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 1:20 pm

are there any other windows computer running?

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 1:23 pm

Yes... It seems not to do anything for now... I tried this code too (from the german forums) and still nothing

Code: Select all


#MAX_PREFERRED_LENGTH = -1
#SV_TYPE_ALL          = $FFFFFFFF
#NERR_SUCCESS         = 0
#ERROR_MORE_DATA      = 234
#MainWindow           = 100
#MMTB                 = 200 

Structure SERVER_INFO_101
  dwPlatformId.l
  lpszServerName.l
  dwVersionMajor.l
  dwVersionMinor.l
  dwType.l
  lpszComment.l
EndStructure

Structure LAN_RESULT
  Name.s
  IP_Name.s
  Aktiv_Server.l ; 1, wenn dort ein aktiver Server gefunden werden konnte, dann sind auch  die weiteren Daten belegt
  Spiel_Name.s
  Spieler_bisher.l
EndStructure
Global NewList LAN_Client.LAN_RESULT()

Procedure.s GetIPbyName (NameIP.s)
  TheIPAdress.s
  pHostinfo = gethostbyname_(NameIP)
  If pHostinfo = 0
    TheIPAdress = "Unable to resolve domain name"
  Else
    CopyMemory (pHostinfo, hostinfo.HOSTENT, SizeOf(HOSTENT))
    If hostinfo\h_addrtype <> #AF_INET
      MessageRequester("Info","A non-IP address was returned",0)
    Else
      While PeekL(hostinfo\h_addr_list+AdressNumber*4)
        ipAddress = PeekL(hostinfo\h_addr_list+AdressNumber*4)
        TheIPAdress = StrU(PeekB(ipAddress),0)+"."+StrU(PeekB(ipAddress+1),0)+"."+StrU(PeekB(ipAddress+2),0)+"."+StrU(PeekB(ipAddress+3),0)
        AdressNumber+1
      Wend
    EndIf
  EndIf
  ProcedureReturn TheIPAdress
EndProcedure

Procedure GetLANList()
  IPResult.s
  se101.SERVER_INFO_101
  nStructSize = SizeOf(SERVER_INFO_101)
  RetCode = NetServerEnum_(0, 101, @bufptr, #MAX_PREFERRED_LENGTH, @dwEntriesread, @dwTotalentries, #SV_TYPE_ALL, 0, @dwResumehandle)
  If RetCode = #NERR_SUCCESS And RetCode <> #ERROR_MORE_DATA
    For i = 0 To dwEntriesread - 1
      CopyMemory( bufptr + (nStructSize * i),@se101, nStructSize)
      Buffer.s=Space(512)
      result=WideCharToMultiByte_(#CP_ACP, 0, se101\lpszServerName, 255, @Buffer.s, 512, 0, 0)
      IPResult = GetIPbyName (Buffer)
      AddElement(LAN_Client())
      Debug Buffer
      LAN_Client()\Name = Buffer
      LAN_Client()\IP_Name = IPResult
    Next
  Else
    MessageRequester("Info","Failed",0)
  EndIf
  NetApiBufferFree_(bufptr)

EndProcedure 

GetLANList()

[Edit]
Ok this works now... Code modified.

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 1:24 pm

before the line

Code: Select all

DeleteElement(listnetresource())

add

Code: Select all

Debug "deleted "+listnetresource()\RemoteName

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 1:26 pm

if u want help with udp broadcasts, i would be glad to help

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 1:28 pm

UDP Broadcasts? How is that? I don't really have any experience in networking

.

lexvictory · Post by **lexvictory** » Sat Sep 23, 2006 1:34 pm

Inf0Byt3 wrote:UDP Broadcasts? How is that? I don't really have any experience in networking .

with udp broadcasts, it is sent to an ip ending in 255, eg 192.168.0.255; and all computers with with an ip in the 192.168.0.x range will receive/see the packet.

i found some code somewhere on this forum to retreive network adapters and their ips, i'll post it if u need it

Inf0Byt3 · Post by **Inf0Byt3** » Sat Sep 23, 2006 2:20 pm

Wow, that's great! Thank you for all the help!

[Edit]
I'll try the code i have around and if it fails, i'll PM you. Thanks!