Probably can find something here:
http://msdn2.microsoft.com/en-us/library/aa915714.aspx
chanmm
"cyberco" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> I've posted this question in
> 'microsoft.public.dotnet.framework.compactframework' as well, but
> despite the great help I still haven't solved the problem. So before
> going the C++ route I would like to see if anybody in this group may
> have the answer.
>
> What I'm trying to do is change the route table of my Windows Mobile 5
> Pocket PC (.Net CF) device (TyTN) using C#. This is probably similar as
> doing it on standard CF. Using Iphlpapi.dll I can retrieve the route
> table, but I am unable to change/add a route. I have specified the
> following structs/pinvokes:
>
> =========START===========
> [StructLayout(LayoutKind.Sequential)]
> public struct MIB_IPFORWARDROW {
> public UInt32 dwForwardDest; //destination IP address.
> public UInt32 dwForwardMask; //Subnet mask
> public UInt32 dwForwardPolicy; //conditions for multi-path
> route. Unused, specify 0.
> public UInt32 dwForwardNextHop; //IP address of the next hop.
> Own address?
> public UInt32 dwForwardIfIndex; //index of interface
> public UInt32 dwForwardType; //route type
> public UInt32 dwForwardProto; //routing protocol.
> public UInt32 dwForwardAge; //age of route.
> public UInt32 dwForwardNextHopAS; //autonomous system number. 0
> if not relevant
> public int dwForwardMetric1; //-1 if not used (goes for all
> metrics)
> public int dwForwardMetric2;
> public int dwForwardMetric3;
> public int dwForwardMetric4;
> public int dwForwardMetric5;
> }
>
> [StructLayout(LayoutKind.Sequential)]
> public struct MIB_IPFORWARDTABLE {
> public int dwNumEntries; //number of route entries in
> the table.
> public MIB_IPFORWARDROW[] table;
> }
>
>
> [DllImport("Iphlpapi.dll")]
> [return: MarshalAs(UnmanagedType.U4)]
> public static extern int CreateIpForwardEntry(ref MIB_IPFORWARDROW
> pRoute);
>
> [DllImport("Iphlpapi.dll")]
> [return: MarshalAs(UnmanagedType.U4)]
> public static extern int DeleteIpForwardEntry(ref MIB_IPFORWARDROW
> pRoute);
>
> [DllImport("Iphlpapi.dll")]
> [return: MarshalAs(UnmanagedType.U4)]
> public static extern int SetIpForwardEntry(ref MIB_IPFORWARDROW
> pRoute);
>
> [DllImport("Iphlpapi.dll")]
> [return: MarshalAs(UnmanagedType.U4)]
> public static extern int GetIpForwardTable(byte[] pIpForwardTable, out
> int pdwSize, bool bOrder);
>
> =========END===========
>
>
> I invoke these methods as follows:
>
>
> =========START===========
> public int createIpForwardEntry(UInt32 destIPAddress, UInt32 destMask,
> UInt32 nextHopIPAddress,
> UInt32 ifIndex) {
> MIB_IPFORWARDROW mifr = new MIB_IPFORWARDROW();
> mifr.dwForwardDest = destIPAddress;
> mifr.dwForwardMask = destMask;
> mifr.dwForwardPolicy = Convert.ToUInt32(0);
> mifr.dwForwardNextHop = nextHopIPAddress;
> mifr.dwForwardIfIndex = ifIndex; //?
> mifr.dwForwardType = Convert.ToUInt32(4);
> mifr.dwForwardProto = Convert.ToUInt32(3);
> mifr.dwForwardAge = Convert.ToUInt32(0);
> mifr.dwForwardNextHopAS = Convert.ToUInt32(0);
> mifr.dwForwardMetric1 = -1;
> mifr.dwForwardMetric2 = -1;
> mifr.dwForwardMetric3 = -1;
> mifr.dwForwardMetric4 = -1;
> mifr.dwForwardMetric5 = -1;
> return CreateIpForwardEntry(ref mifr);
> }
> =========END===========
>
> All IP addresses are added as unsigned ints (double checked whether
> they are correct. I even tried adding a row that I just successfully
> retrieved (thereby skipping my own structure). If that gives me an
> error code 87 (invalid param).
>
> Is there anybody here that has successfully done this or has a few
> relevant pointers? Preferably C# examples, but C++ examples are a step
> in the right direction. Thanks!
>
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