RtmAddRouteToDest Help
From: Suja (sujamoljames_at_yahoo.com)
Date: 12/14/04
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Date: 14 Dec 2004 07:11:03 -0800
Hi All,
As there is no success with IP helper functions when RRAS is running, I
moved to Routing Table Manager Version 2 Functions. But the sample code
I wrote based on MSDN help is running with out an any error. Only thing
is the routes are note updated. When I check the route using route.exe,
no addition is happend. I pasting my code below. Please have a look.
Thanks,
Suja
void AddRouteEntry()
{
RTM_ENTITY_INFO EntityInfo;
DWORD Status,VendorId=10;
RTM_ENTITY_EXPORT_METHODS ExportMethods;
RTM_REGN_PROFILE RegnProfile;
RTM_ENTITY_HANDLE RtmRegHandle;
EntityInfo.RtmInstanceId = 0; // Must be set to default for now
EntityInfo.AddressFamily = AF_INET;
EntityInfo.EntityId.EntityProtocolId = PROTO_IP_RIP;
EntityInfo.EntityId.EntityInstanceId = MS_IP_RIP;
RegnProfile.MaxNextHopsInRoute = 1;
RegnProfile.MaxHandlesInEnum =1;
RegnProfile.ViewsSupported = 1;
RegnProfile.NumberOfViews = 1;
ExportMethods.NumMethods = 0;
Status = RtmRegisterEntity(&EntityInfo,
&ExportMethods,
NULL,
TRUE,
&RegnProfile,
&RtmRegHandle);
if (Status != NO_ERROR)
{
MessageBox(NULL, "Registration failed - Log an Error and
Quit","Test",0);
return ;
}
// Add a route to a destination given by (addr, masklen)
// using a next hop reachable with an interface
RTM_NEXTHOP_INFO NextHopInfo;
unsigned int nexthop = ntohl (inet_addr ("172.16.2.1"));
// First, create and add a next hop to the caller's
// next-hop tree (if it does not already exist)
ZeroMemory(&NextHopInfo, sizeof(RTM_NEXTHOP_INFO));
RTM_IPV4_MAKE_NET_ADDRESS(&NextHopInfo.NextHopAddress,
nexthop, // Address of the next hop
32);
NextHopInfo.InterfaceIndex = 1;//0x2000003; //0x8000004;
RTM_NEXTHOP_HANDLE NextHopHandle = NULL;
RTM_NEXTHOP_CHANGE_FLAGS ChangeFlags;
Status = RtmAddNextHop(RtmRegHandle,
&NextHopInfo,
&NextHopHandle,
&ChangeFlags);
unsigned int addr =ntohl (inet_addr ("172.16.2.33"));
if (Status == NO_ERROR)
{
// Created a new next hop or found an old one
// Fill in the route information for the route
RTM_ROUTE_INFO RouteInfo;
ZeroMemory(&RouteInfo, sizeof(RTM_ROUTE_INFO));
RTM_NET_ADDRESS NetAddress;
unsigned int masklen = 32;
unsigned int metric = 10;
// Fill in the destination network's address and mask values
RTM_IPV4_MAKE_NET_ADDRESS(&NetAddress, addr, masklen);
// Assume 'neighbour learnt from' is the first next hop
RouteInfo.Neighbour = NextHopHandle;
// Set metric for route; Preference set internally
RouteInfo.PrefInfo.Metric = metric;
// Adding a route to both the unicast and multicast views
RouteInfo.BelongsToViews = RTM_VIEW_MASK_UCAST;
RouteInfo.NextHopsList.NumNextHops = 1;
RouteInfo.NextHopsList.NextHops[0] = NextHopHandle;
// If you want to add a new route, regardless of
// whether a similar route already exists, use the following
// ChangeFlags = RTM_ROUTE_CHANGE_NEW;
ChangeFlags = RTM_ROUTE_CHANGE_NEW;
RTM_ROUTE_HANDLE RouteHandle = NULL;
RTM_ROUTE_LIST_HANDLE RouteListHandle1 = NULL;
Status = RtmAddRouteToDest(RtmRegHandle,
&RouteHandle, // Can be NULL if you do not need handle
&NetAddress,
&RouteInfo,
INFINITE ,
RouteListHandle1, // Also add the route to this list
0,
NULL,
&ChangeFlags);
if (Status == NO_ERROR)
{
if (ChangeFlags & RTM_ROUTE_CHANGE_NEW)
{
// A new route has been created
MessageBox(NULL, "RTM ROUTE CHANGE NEW","Test",0);
}
else
{
// An existing route is updated
MessageBox(NULL, "Existing route is updated","Test",0);
}
}
if (ChangeFlags & RTM_ROUTE_CHANGE_BEST)
{
// Best route information has changed
MessageBox(NULL, "Best route information has changed","Test",0);
}
// Release the route handle if you do not need it
//RtmReleaseRoutes(RtmRegHandle, 1, &RouteHandle);
}
// Also release the next hop since it is no longer needed
// RtmReleaseNextHops(RtmRegHandle, 1, &NextHopHandle);
}
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