Changing Route Table

[cyberco]

I've posted this question in
'microsoft.publ ic.dotnet.frame work.compactfra mework' 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(La youtKind.Sequen tial)]
public struct MIB_IPFORWARDRO W {
public UInt32 dwForwardDest; //destination IP address.
public UInt32 dwForwardMask; //Subnet mask
public UInt32 dwForwardPolicy ; //conditions for multi-path
route. Unused, specify 0.
public UInt32 dwForwardNextHo p; //IP address of the next hop.
Own address?
public UInt32 dwForwardIfInde x; //index of interface
public UInt32 dwForwardType; //route type
public UInt32 dwForwardProto; //routing protocol.
public UInt32 dwForwardAge; //age of route.
public UInt32 dwForwardNextHo pAS; //autonomous system number. 0
if not relevant
public int dwForwardMetric 1; //-1 if not used (goes for all
metrics)
public int dwForwardMetric 2;
public int dwForwardMetric 3;
public int dwForwardMetric 4;
public int dwForwardMetric 5;
}

[StructLayout(La youtKind.Sequen tial)]
public struct MIB_IPFORWARDTA BLE {
public int dwNumEntries; //number of route entries in
the table.
public MIB_IPFORWARDRO W[] table;
}
[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int CreateIpForward Entry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int DeleteIpForward Entry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int SetIpForwardEnt ry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int GetIpForwardTab le(byte[] pIpForwardTable , out
int pdwSize, bool bOrder);

=========END=== ========
I invoke these methods as follows:
=========START= ==========
public int createIpForward Entry(UInt32 destIPAddress, UInt32 destMask,
UInt32 nextHopIPAddres s,
UInt32 ifIndex) {
MIB_IPFORWARDRO W mifr = new MIB_IPFORWARDRO W();
mifr.dwForwardD est = destIPAddress;
mifr.dwForwardM ask = destMask;
mifr.dwForwardP olicy = Convert.ToUInt3 2(0);
mifr.dwForwardN extHop = nextHopIPAddres s;
mifr.dwForwardI fIndex = ifIndex; //?
mifr.dwForwardT ype = Convert.ToUInt3 2(4);
mifr.dwForwardP roto = Convert.ToUInt3 2(3);
mifr.dwForwardA ge = Convert.ToUInt3 2(0);
mifr.dwForwardN extHopAS = Convert.ToUInt3 2(0);
mifr.dwForwardM etric1 = -1;
mifr.dwForwardM etric2 = -1;
mifr.dwForwardM etric3 = -1;
mifr.dwForwardM etric4 = -1;
mifr.dwForwardM etric5 = -1;
return CreateIpForward Entry(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!

[chanmm]

Probably can find something here:
http://msdn2.microsoft.com/en-us/library/aa915714.aspx

chanmm

"cyberco" <cy*****@gmail. comwrote in message
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

I've posted this question in
'microsoft.publ ic.dotnet.frame work.compactfra mework' 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(La youtKind.Sequen tial)]
public struct MIB_IPFORWARDRO W {
public UInt32 dwForwardDest; //destination IP address.
public UInt32 dwForwardMask; //Subnet mask
public UInt32 dwForwardPolicy ; //conditions for multi-path
route. Unused, specify 0.
public UInt32 dwForwardNextHo p; //IP address of the next hop.
Own address?
public UInt32 dwForwardIfInde x; //index of interface
public UInt32 dwForwardType; //route type
public UInt32 dwForwardProto; //routing protocol.
public UInt32 dwForwardAge; //age of route.
public UInt32 dwForwardNextHo pAS; //autonomous system number. 0
if not relevant
public int dwForwardMetric 1; //-1 if not used (goes for all
metrics)
public int dwForwardMetric 2;
public int dwForwardMetric 3;
public int dwForwardMetric 4;
public int dwForwardMetric 5;
}

[StructLayout(La youtKind.Sequen tial)]
public struct MIB_IPFORWARDTA BLE {
public int dwNumEntries; //number of route entries in
the table.
public MIB_IPFORWARDRO W[] table;
}
[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int CreateIpForward Entry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int DeleteIpForward Entry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int SetIpForwardEnt ry(ref MIB_IPFORWARDRO W
pRoute);

[DllImport("Iphl papi.dll")]
[return: MarshalAs(Unman agedType.U4)]
public static extern int GetIpForwardTab le(byte[] pIpForwardTable , out
int pdwSize, bool bOrder);

=========END=== ========
I invoke these methods as follows:
=========START= ==========
public int createIpForward Entry(UInt32 destIPAddress, UInt32 destMask,
UInt32 nextHopIPAddres s,
UInt32 ifIndex) {
MIB_IPFORWARDRO W mifr = new MIB_IPFORWARDRO W();
mifr.dwForwardD est = destIPAddress;
mifr.dwForwardM ask = destMask;
mifr.dwForwardP olicy = Convert.ToUInt3 2(0);
mifr.dwForwardN extHop = nextHopIPAddres s;
mifr.dwForwardI fIndex = ifIndex; //?
mifr.dwForwardT ype = Convert.ToUInt3 2(4);
mifr.dwForwardP roto = Convert.ToUInt3 2(3);
mifr.dwForwardA ge = Convert.ToUInt3 2(0);
mifr.dwForwardN extHopAS = Convert.ToUInt3 2(0);
mifr.dwForwardM etric1 = -1;
mifr.dwForwardM etric2 = -1;
mifr.dwForwardM etric3 = -1;
mifr.dwForwardM etric4 = -1;
mifr.dwForwardM etric5 = -1;
return CreateIpForward Entry(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!

[cyberco]

Those look like really useful utilities, but, forgive me for asking an
obvious question, where can I get those tools? The location at the top
of the page doesn't mean much to me... :(
chanmm wrote:

Probably can find something here:
http://msdn2.microsoft.com/en-us/library/aa915714.aspx

chanmm

[cyberco]

I figured maybe the problem is that I should reserve some memory for
the new MIB_IPFORWARDRO W I'm creating (as I do in the following code)?

=========START= ==========
public int createIpForward Entry(UInt32 destIPAddress, UInt32 destMask,
UInt32 nextHopIPAddres s,
UInt32 ifIndex) {
MIB_IPFORWARDRO W mifr = new MIB_IPFORWARDRO W();
mifr.dwForwardD est = destIPAddress;
mifr.dwForwardM ask = destMask;
mifr.dwForwardP olicy = Convert.ToUInt3 2(0);
mifr.dwForwardN extHop = nextHopIPAddres s;
mifr.dwForwardI fIndex = ifIndex; //?
mifr.dwForwardT ype = Convert.ToUInt3 2(4);
mifr.dwForwardP roto = Convert.ToUInt3 2(3);
mifr.dwForwardA ge = Convert.ToUInt3 2(0);
mifr.dwForwardN extHopAS = Convert.ToUInt3 2(0);
mifr.dwForwardM etric1 = -1;
mifr.dwForwardM etric2 = -1;
mifr.dwForwardM etric3 = -1;
mifr.dwForwardM etric4 = -1;
mifr.dwForwardM etric5 = -1;
return CreateIpForward Entry(ref mifr);}
=========END=== ========