Hi all,
Iam new to c# . The problem is that i want to add/del/edit
system
routes using c#.
I used the calls like GetIpForwardTable() to do the above
but it is not
working. Any sample on how to use route table manuplation
calls in c#
will be of great help. Its urgent please help me.
The code i tried that is not working is as follows:
public class RouteMgmt
{
[DllImport("Iphlpapi.dll")]
[return: MarshalAs(UnmanagedType.U4)]
public extern static int CreateIpForwardEntry(ref
MIB_IPFORWARDROW pRoute);
[DllImport("Iphlpapi.dll")]
[return: MarshalAs(UnmanagedType.U4)]
public extern static int GetIpForwardTable(out
MIB_IPFORWARDTABLE pTable,out int size,bool order);
[StructLayout(LayoutKind.Sequential)]
public struct MIB_IPFORWARDROW
{
public ulong dwForwardDest;
public ulong dwForwardMask;
public ulong dwForwardPolicy;
public ulong dwForwardNextHop;
public ulong dwForwardIfIndex;
public ulong dwForwardType;
public ulong dwForwardProto;
public ulong dwForwardAge;
public ulong dwForwardNextHopAS;
public ulong dwForwardMetric1;
public ulong dwForwardMetric2;
public ulong dwForwardMetric3;
public ulong dwForwardMetric4;
public ulong dwForwardMetric5;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_IPFORWARDTABLE
{
public UInt32 dwNumEntries;
//public MIB_IPFORWARDROW[] table;
//public MIB_IPFORWARDROW* ptr;
public char[] arr;
//public UInt32 tables[];
}
public void AddRoute(string Dstipaddr,string
DstMsk,string
ttl,string metric,string gateway)
{
int ret;
ulong newgw = 0x51615172;
ulong newdest = 0x461615172;
ulong newmsk = 0x0255255255;
MIB_IPFORWARDROW routeadd = new
MIB_IPFORWARDROW();
IPAddress TempIP = IPAddress.Parse(Dstipaddr);
IPAddress TempMsk = IPAddress.Parse(DstMsk);
IPAddress TempGw = IPAddress.Parse(gateway);
//UInt32 TempDec = Convert.ToUInt32(Dstipaddr);
//routeadd.dwForwardDest =
Convert.ToUInt32(TempIP.Address);
//routeadd.dwForwardMask =
Convert.ToUInt32(TempMsk.Address);
routeadd.dwForwardDest = newdest;
routeadd.dwForwardMask = 24;
//routeadd.dwForwardAge =
Convert.ToUInt32(IPAddress.HostToNetworkOrder(Convert.ToInt3
2(ttl)));
//routeadd.dwForwardAge = Convert.ToUInt32(ttl);
//routeadd.dwForwardMetric1 =
Convert.ToUInt32(metric);
routeadd.dwForwardAge = 5000;
routeadd.dwForwardMetric1 = 4;
//routeadd.dwForwardMetric2 = -1;
//routeadd.dwForwardMetric3 = -1;
//routeadd.dwForwardMetric4 = -1;
//routeadd.dwForwardMetric5 = -1;
routeadd.dwForwardIfIndex = 0;
//routeadd.dwForwardNextHop =
Convert.ToUInt32(TempGw.Address);
routeadd.dwForwardNextHop = newgw;
routeadd.dwForwardProto = 3;
routeadd.dwForwardType = 4;
if ((ret = CreateIpForwardEntry(ref routeadd))
!= 0)
{
}
}
public void DisplayRoute()
{
MIB_IPFORWARDTABLE routedisp = new
MIB_IPFORWARDTABLE();
int dwSize = 0;
bool order = true;
int ret;
int stusize;
if ((ret = GetIpForwardTable(out routedisp,out
dwSize,order)) != 0)
{
//stusize =
(dwSize/Marshal.SizeOf(typeof(MIB_IPFORWARDROW)));
//routedisp.table = new
MIB_IPFORWARDROW[stusize];
routedisp.arr = new char[dwSize];
}
if ((ret = GetIpForwardTable(out routedisp, out
dwSize,
order)) != 0)
{
}
MIB_IPFORWARDROW[] temp = new
MIB_IPFORWARDROW[dwSize];
for (int i = 0; i <= dwSize; i++)
{
//temp[i] =
(MIB_IPFORWARDROW)Marshal.PtrToStructure(ref routedisp.arr,
typeof(MIB_IPFORWARDROW));
//temp[i] = Marshal.
//temp = routedisp.table[0];
}
}
}
I dont know what the problem is. Please help to correct the
above code
or give me a sample code for the same. Its urgent please
help.
Varun
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