988 lines
26 KiB
C
988 lines
26 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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routing\ip\rtrmgr\init.c
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Abstract:
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IP Router Manager code
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Revision History:
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Gurdeep Singh Pall 6/14/95 Created
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--*/
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#include "allinc.h"
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// ChangeRouteWithForwarder()
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//
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// Function: If addroute is TRUE this function adds an IP route. If addroute is FALSE
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// this function deletes the given route with the forwarder.
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//
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// Returns: Nothing
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//
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//
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DWORD
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ChangeRouteWithForwarder(
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PRTM_NET_ADDRESS pDestAddr,
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PRTM_ROUTE_INFO pRoute,
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BOOL bAddRoute,
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BOOL bDelOld
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)
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{
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IPMultihopRouteEntry *pMultiRouteEntry;
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IPRouteEntry *pRouteEntry;
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IPRouteNextHopEntry *pNexthopEntry;
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RTM_ENTITY_INFO entityInfo;
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RTM_NEXTHOP_INFO nhiInfo;
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PADAPTER_INFO pBinding;
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UINT numnexthops, i;
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ULONG numbytes;
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DWORD dwAddr, dwMask;
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UINT dwLen;
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ULONG ifindex, nexthop, type;
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BOOL bValidNHop;
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DWORD context;
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DWORD dwLocalNet, dwLocalMask;
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DWORD dwResult;
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TraceEnter("ChangeRouteWithForwarder");
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if(!g_bSetRoutesToStack)
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{
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Trace0(ROUTE,
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"ChangeRouteWithForwarder: SetRoutesToStack is FALSE");
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TraceLeave("ChangeRouteWithForwarder");
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return NO_ERROR;
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}
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if (bAddRoute)
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{
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//
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// Ensure that the stack bit is set
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//
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if (!pRoute || !IsRouteStack(pRoute))
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{
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if (!pRoute )
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{
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Trace0(ROUTE,
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"Error adding route, route == NULL"
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);
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}
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else
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{
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Trace1(ROUTE,
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"Error adding route, Stack bit == %d",
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IsRouteStack(pRoute)
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);
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}
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TraceLeave("ChangeRouteWithForwarder");
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return ERROR_INVALID_PARAMETER;
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}
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// We should have atleast one nexthop
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numnexthops = pRoute->NextHopsList.NumNextHops;
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if (numnexthops == 0)
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{
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Trace0(ROUTE,
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"Error adding route, no nexthops");
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TraceLeave("ChangeRouteWithForwarder");
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return ERROR_INVALID_PARAMETER;
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}
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numbytes = sizeof(IPMultihopRouteEntry) +
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(numnexthops - 1) *
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sizeof(IPRouteNextHopEntry);
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}
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else
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{
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//
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// for routes to be deleted, they should be stack
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// routes
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//
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// We do not have any next hops here
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numbytes = sizeof(IPMultihopRouteEntry);
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}
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__try
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{
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pMultiRouteEntry = _alloca(numbytes);
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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pRouteEntry = &pMultiRouteEntry->imre_routeinfo;
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//
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// Fill the dest and mask for the current route
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//
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RTM_IPV4_GET_ADDR_AND_LEN(pRouteEntry->ire_dest,
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dwLen,
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pDestAddr);
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pRouteEntry->ire_mask = RTM_IPV4_MASK_FROM_LEN(dwLen);
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TraceRoute2(ROUTE,
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"route to %d.%d.%d.%d/%d.%d.%d.%d",
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PRINT_IPADDR(pRouteEntry->ire_dest),
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PRINT_IPADDR(pRouteEntry->ire_mask));
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if (!bAddRoute)
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{
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//
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// Prepare to delete old information on dest
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//
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pRouteEntry->ire_type = IRE_TYPE_INVALID;
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pMultiRouteEntry->imre_numnexthops = 0;
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Trace2(ROUTE,
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"ChangeRouteWithForwarder: Deleting all " \
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"routes to %d.%d.%d.%d/%d.%d.%d.%d",
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PRINT_IPADDR(pRouteEntry->ire_dest),
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PRINT_IPADDR(pRouteEntry->ire_mask));
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dwResult = SetIpMultihopRouteEntryToStack(pMultiRouteEntry);
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TraceLeave("ChangeRouteWithForwarder");
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return dwResult;
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}
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//
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// Get the routing protocol of the route's owner
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//
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dwResult = RtmGetEntityInfo(g_hLocalRoute,
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pRoute->RouteOwner,
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&entityInfo);
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if (dwResult isnot NO_ERROR)
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{
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Trace1(ROUTE,
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"Error %d retrieving entity info from RTM",
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dwResult);
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TraceLeave("ChangeRouteWithForwarder");
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return dwResult;
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}
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//
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// Prepare to add a multihop route on this dest
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//
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// Prepare information common to all nexthops
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pRouteEntry->ire_proto = entityInfo.EntityId.EntityProtocolId;
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pRouteEntry->ire_metric1 = pRoute->PrefInfo.Metric;
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pRouteEntry->ire_metric2 = IRE_METRIC_UNUSED;
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pRouteEntry->ire_metric3 = IRE_METRIC_UNUSED;
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pRouteEntry->ire_metric4 = IRE_METRIC_UNUSED;
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pRouteEntry->ire_metric5 = IRE_METRIC_UNUSED;
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pRouteEntry->ire_age = 0;
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numnexthops = 0;
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for (i = 0; i < pRoute->NextHopsList.NumNextHops; i++)
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{
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// Get and release next hop info as we got a copy
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dwResult = RtmGetNextHopInfo(g_hLocalRoute,
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pRoute->NextHopsList.NextHops[i],
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&nhiInfo);
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if (dwResult isnot NO_ERROR)
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{
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Trace1(ROUTE,
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"Error %d retrieving next hop info from RTM",
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dwResult);
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continue;
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}
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RtmReleaseNextHopInfo(g_hLocalRoute, &nhiInfo);
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// Get the next hop address from the nexthop info
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RTM_IPV4_GET_ADDR_AND_LEN(nexthop,
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dwLen,
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&nhiInfo.NextHopAddress);
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TraceRoute3(
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ROUTE, "Next Hop %d.%d.%d.%d, If 0x%x, handle is 0x%x",
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PRINT_IPADDR(nexthop),
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nhiInfo.InterfaceIndex,
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pRoute->NextHopsList.NextHops[i]
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);
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ENTER_READER(BINDING_LIST);
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//
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// find the binding given the interface id
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//
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pBinding = GetInterfaceBinding(nhiInfo.InterfaceIndex);
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if(!(pBinding))
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{
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//
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// The interface was deleted so lets just get out
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//
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EXIT_LOCK(BINDING_LIST);
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TraceRoute2(ERR,
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"**Warning** tried to %s route with interface %d which "
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"is no longer present",
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bAddRoute?"add":"delete",
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nhiInfo.InterfaceIndex);
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continue;
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}
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//
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// set adapter index - this is 0xffffffff
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// if the nexthop interface is not MAPPED
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//
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ifindex = pBinding->bBound ? pBinding->dwIfIndex : INVALID_IF_INDEX;
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if(((pRouteEntry->ire_proto is PROTO_IP_NT_STATIC) or
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(pRouteEntry->ire_proto is PROTO_IP_NT_AUTOSTATIC)) and
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(pBinding->ritType is ROUTER_IF_TYPE_FULL_ROUTER))
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{
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context = pBinding->dwSeqNumber;
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TraceRoute1(ROUTE,
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"route context : ICB == %d\n\n",
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pBinding->dwSeqNumber);
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}
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else
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{
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context = 0;
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if(ifindex is INVALID_IF_INDEX)
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{
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Trace3(ERR,
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"**Error** Tried to %s route to %d.%d.%d.%d over %d as DOD\n",
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bAddRoute?"add":"delete",
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PRINT_IPADDR(pRouteEntry->ire_dest),
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pBinding->dwIfIndex);
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EXIT_LOCK(BINDING_LIST);
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continue;
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}
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}
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//
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// First we figure out the correct nexthop for p2p links
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// For all other links, we take the whatever is given to us
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//
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if(IsIfP2P(pBinding->ritType))
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{
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if(pBinding->bBound)
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{
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TraceRoute2(
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ROUTE, "Next Hop %d.%d.%d.%d, remote address %d.%d.%d.%d, "
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"bound p2p",
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PRINT_IPADDR(nexthop),
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PRINT_IPADDR(pBinding->dwRemoteAddress)
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);
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if (nexthop is 0)
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{
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nexthop = pBinding->dwRemoteAddress;
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}
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}
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else
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{
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nexthop = 0;
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}
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}
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//
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// Now we figure out if the route is a direct route or indirect routes
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// Routes over unconnected demand dial routes are marked OTHER
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//
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//
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// For connected WAN interfaces (P2P with mask of 255.255.255.255) we
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// do two checks:
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// The next hop should be local address or remote address.
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// AR: We used to do the above check but removed it because when
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// we set a route over a disconnected interface, we dont
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// know the address of the remote endpoint
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// If the dest is remote address, then the MASK must be all ONES
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// We mark all valid routes as DIRECT
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//
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//
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// For LAN interfaces and WAN with non all ones mask, we check the
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// following:
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// A direct route to a host must have the Destination as the NextHop
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// A direct route to a network must have the the NextHop as one of the
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// local interfaces
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// The next hop must be on the same subnet as one of the bindings
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//
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type = IRE_TYPE_OTHER;
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if(pBinding->bBound)
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{
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if((pBinding->dwNumAddresses is 1) and
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(pBinding->rgibBinding[0].dwMask is ALL_ONES_MASK))
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{
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//
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// route over P2P link or P2MP link, possibly unnumbered.
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//
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if(((pBinding->dwRemoteAddress isnot 0) and
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(pRouteEntry->ire_dest is pBinding->dwRemoteAddress)) or
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(pRouteEntry->ire_dest is nexthop))
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{
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type = IRE_TYPE_DIRECT;
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}
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else
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{
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type = IRE_TYPE_INDIRECT;
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}
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}
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else
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{
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//
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// A route over a non P2P link or a bay style p2p link which
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// has a /30 mask
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//
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bValidNHop = FALSE;
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type = IRE_TYPE_INDIRECT;
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for(i = 0; i < pBinding->dwNumAddresses; i++)
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{
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dwLocalMask = pBinding->rgibBinding[i].dwMask;
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dwLocalNet = pBinding->rgibBinding[i].dwAddress & dwLocalMask;
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if((dwLocalNet is (pRouteEntry->ire_dest & dwLocalMask)) or
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(nexthop is IP_LOOPBACK_ADDRESS) or
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(nexthop is pBinding->rgibBinding[i].dwAddress))
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{
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//
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// Route to local net or over loopback
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//
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type = IRE_TYPE_DIRECT;
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}
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if(((nexthop & dwLocalMask) is dwLocalNet) or
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((nexthop is IP_LOOPBACK_ADDRESS)))
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{
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//
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// Next hop is on local net or loopback
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// That is good
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//
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bValidNHop = TRUE;
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break;
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}
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}
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if(!bValidNHop and
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(pBinding->dwNumAddresses isnot 0) and
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(pBinding->ritType isnot ROUTER_IF_TYPE_INTERNAL))
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{
|
||
|
|
Trace0(ERR,
|
||
|
|
"ERROR - Nexthop not on same network");
|
||
|
|
|
||
|
|
for(i = 0; i < pBinding->dwNumAddresses; i ++)
|
||
|
|
{
|
||
|
|
Trace3(ROUTE,"AdapterId: %d, %d.%d.%d.%d/%d.%d.%d.%d",
|
||
|
|
pBinding->dwIfIndex,
|
||
|
|
PRINT_IPADDR(pBinding->rgibBinding[i].dwAddress),
|
||
|
|
PRINT_IPADDR(pBinding->rgibBinding[i].dwMask));
|
||
|
|
}
|
||
|
|
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
|
||
|
|
|
||
|
|
// PrintRoute(ERR, ipRoute);
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
// DGT workaround for bug where stack won't accept
|
||
|
|
// nexthop of 0.0.0.0. Until Chait fixes this, we'll
|
||
|
|
// set nexthop to the ifindex.
|
||
|
|
|
||
|
|
if (!nexthop)
|
||
|
|
{
|
||
|
|
nexthop = ifindex;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
//
|
||
|
|
// Fill the current nexthop info into the route
|
||
|
|
//
|
||
|
|
|
||
|
|
if (numnexthops)
|
||
|
|
{
|
||
|
|
// Copy to the next posn in the route
|
||
|
|
pNexthopEntry =
|
||
|
|
&pMultiRouteEntry->imre_morenexthops[numnexthops - 1];
|
||
|
|
|
||
|
|
pNexthopEntry->ine_iretype = type;
|
||
|
|
pNexthopEntry->ine_ifindex = ifindex;
|
||
|
|
pNexthopEntry->ine_nexthop = nexthop;
|
||
|
|
pNexthopEntry->ine_context = context;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Copy to the first posn in the route
|
||
|
|
pRouteEntry->ire_type = type;
|
||
|
|
pRouteEntry->ire_index = ifindex;
|
||
|
|
pRouteEntry->ire_nexthop = nexthop;
|
||
|
|
pRouteEntry->ire_context = context;
|
||
|
|
}
|
||
|
|
|
||
|
|
numnexthops++;
|
||
|
|
}
|
||
|
|
|
||
|
|
pMultiRouteEntry->imre_numnexthops = numnexthops;
|
||
|
|
pMultiRouteEntry->imre_flags = bDelOld ? IMRE_FLAG_DELETE_DEST : 0;
|
||
|
|
|
||
|
|
if (numnexthops > 0)
|
||
|
|
{
|
||
|
|
dwResult = SetIpMultihopRouteEntryToStack(pMultiRouteEntry);
|
||
|
|
|
||
|
|
if(dwResult isnot NO_ERROR)
|
||
|
|
{
|
||
|
|
if(pRouteEntry->ire_nexthop != IP_LOOPBACK_ADDRESS)
|
||
|
|
{
|
||
|
|
Trace1(ERR,
|
||
|
|
"Route addition failed with %x for", dwResult);
|
||
|
|
|
||
|
|
PrintRoute(ERR, pMultiRouteEntry);
|
||
|
|
}
|
||
|
|
|
||
|
|
Trace1(ERR,
|
||
|
|
"Route addition failed with %x for local route", dwResult);
|
||
|
|
|
||
|
|
TraceLeave("ChangeRouteWithForwarder");
|
||
|
|
|
||
|
|
return dwResult;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Trace0(ROUTE,
|
||
|
|
"Route addition succeeded for");
|
||
|
|
|
||
|
|
PrintRoute(ROUTE, pMultiRouteEntry);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Trace0(ERR, "Route not added since there are no next hops" );
|
||
|
|
|
||
|
|
PrintRoute(ROUTE, pMultiRouteEntry);
|
||
|
|
}
|
||
|
|
|
||
|
|
TraceLeave("ChangeRouteWithForwarder");
|
||
|
|
|
||
|
|
return NO_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
DWORD
|
||
|
|
WINAPI
|
||
|
|
ValidateRouteForProtocol(
|
||
|
|
IN DWORD dwProtoId,
|
||
|
|
IN PVOID pRouteInfo,
|
||
|
|
IN PVOID pDestAddr OPTIONAL
|
||
|
|
)
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
This function is called by the router Manger (and indirectly by routing
|
||
|
|
protocols) to validate the route info. We set the preference and the
|
||
|
|
type of the route
|
||
|
|
|
||
|
|
Locks:
|
||
|
|
|
||
|
|
Acquires the binding lock
|
||
|
|
This function CAN NOT acquire the ICB lock
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
dwProtoId Protocols Id
|
||
|
|
pRoute
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
NO_ERROR
|
||
|
|
RtmError code
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
{
|
||
|
|
RTM_DEST_INFO destInfo;
|
||
|
|
PRTM_ROUTE_INFO pRoute;
|
||
|
|
RTM_NEXTHOP_INFO nextHop;
|
||
|
|
PADAPTER_INFO pBinding;
|
||
|
|
HANDLE hNextHop;
|
||
|
|
BOOL bValidNHop;
|
||
|
|
DWORD dwIfIndex;
|
||
|
|
DWORD dwLocalNet;
|
||
|
|
DWORD dwLocalMask;
|
||
|
|
DWORD destAddr;
|
||
|
|
DWORD destMask;
|
||
|
|
DWORD nexthop;
|
||
|
|
DWORD nhopMask;
|
||
|
|
DWORD dwType;
|
||
|
|
DWORD dwResult;
|
||
|
|
UINT i, j;
|
||
|
|
|
||
|
|
pRoute = (PRTM_ROUTE_INFO)pRouteInfo;
|
||
|
|
|
||
|
|
if (pRoute->PrefInfo.Preference is 0)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Map the metric weight based on the weight assigned by admin
|
||
|
|
//
|
||
|
|
|
||
|
|
pRoute->PrefInfo.Preference = ComputeRouteMetric(dwProtoId);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// This validation applies to the unicast routes only.
|
||
|
|
// [ This does not apply to INACTIVE routes and such ]
|
||
|
|
//
|
||
|
|
|
||
|
|
if (!(pRoute->BelongsToViews & RTM_VIEW_MASK_UCAST))
|
||
|
|
{
|
||
|
|
return NO_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the destination address if it is not specified
|
||
|
|
//
|
||
|
|
|
||
|
|
if (!ARGUMENT_PRESENT(pDestAddr))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Get the destination information from the route
|
||
|
|
//
|
||
|
|
|
||
|
|
dwResult = RtmGetDestInfo(g_hLocalRoute,
|
||
|
|
pRoute->DestHandle,
|
||
|
|
RTM_BEST_PROTOCOL,
|
||
|
|
RTM_VIEW_MASK_UCAST,
|
||
|
|
&destInfo);
|
||
|
|
|
||
|
|
if (dwResult != NO_ERROR)
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Invalid destination");
|
||
|
|
|
||
|
|
return dwResult;
|
||
|
|
}
|
||
|
|
|
||
|
|
pDestAddr = &destInfo.DestAddress;
|
||
|
|
|
||
|
|
RtmReleaseDestInfo(g_hLocalRoute, &destInfo);
|
||
|
|
}
|
||
|
|
|
||
|
|
RTM_IPV4_GET_ADDR_AND_MASK(destAddr,
|
||
|
|
destMask,
|
||
|
|
(PRTM_NET_ADDRESS)pDestAddr);
|
||
|
|
|
||
|
|
//
|
||
|
|
// If the dest&Mask != dest then the stack will not set this route
|
||
|
|
// Hence lets do the check here
|
||
|
|
//
|
||
|
|
|
||
|
|
if((destAddr & destMask) isnot destAddr)
|
||
|
|
{
|
||
|
|
|
||
|
|
#if TRACE_DBG
|
||
|
|
|
||
|
|
Trace2(ROUTE,
|
||
|
|
"**ERROR:ValidateRoute: called with Dest %d.%d.%d.%d and Mask %d.%d.%d.%d - This will fail**",
|
||
|
|
PRINT_IPADDR(destAddr),
|
||
|
|
PRINT_IPADDR(destMask));
|
||
|
|
|
||
|
|
#endif // TRACE_DBG
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
if((((DWORD)(destAddr & 0x000000FF)) >= (DWORD)0x000000E0) and
|
||
|
|
(destAddr isnot ALL_ONES_BROADCAST) and
|
||
|
|
(destAddr isnot LOCAL_NET_MULTICAST))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// This will catch the CLASS D/E but allow all 1's bcast
|
||
|
|
//
|
||
|
|
|
||
|
|
Trace1(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Dest %d.%d.%d.%d is invalid",
|
||
|
|
PRINT_IPADDR(destAddr));
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
// Removed this since metric=0 is legal for routes to the loopback
|
||
|
|
// interface.
|
||
|
|
if(pRoute->PrefInfo.Metric is 0)
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Metric cant be 0");
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (pRoute->NextHopsList.NumNextHops == 0)
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Zero next hops");
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Make sure each next hop on the route is a valid one
|
||
|
|
|
||
|
|
for (i = 0; i < pRoute->NextHopsList.NumNextHops; i++)
|
||
|
|
{
|
||
|
|
hNextHop = pRoute->NextHopsList.NextHops[i];
|
||
|
|
|
||
|
|
dwResult = RtmGetNextHopInfo(g_hLocalRoute,
|
||
|
|
hNextHop,
|
||
|
|
&nextHop);
|
||
|
|
|
||
|
|
if (dwResult != NO_ERROR)
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Invalid next hop");
|
||
|
|
|
||
|
|
return dwResult;
|
||
|
|
}
|
||
|
|
|
||
|
|
dwIfIndex = nextHop.InterfaceIndex;
|
||
|
|
|
||
|
|
RTM_IPV4_GET_ADDR_AND_MASK(nexthop,
|
||
|
|
nhopMask,
|
||
|
|
(PRTM_NET_ADDRESS)&nextHop.NextHopAddress);
|
||
|
|
|
||
|
|
RtmReleaseNextHopInfo(g_hLocalRoute, &nextHop);
|
||
|
|
|
||
|
|
// *** Exclusion Begin ***
|
||
|
|
ENTER_READER(BINDING_LIST);
|
||
|
|
|
||
|
|
//
|
||
|
|
// find the interface given the interface id
|
||
|
|
//
|
||
|
|
|
||
|
|
pBinding = GetInterfaceBinding(dwIfIndex);
|
||
|
|
|
||
|
|
if(!pBinding)
|
||
|
|
{
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
|
||
|
|
#if TRACE_DBG
|
||
|
|
|
||
|
|
Trace0(ERR,
|
||
|
|
"**ERROR:ValidateRoute: Interface block doesnt exist");
|
||
|
|
|
||
|
|
#endif // TRACE_DBG
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set whether the route is P2P
|
||
|
|
//
|
||
|
|
|
||
|
|
if(IsIfP2P(pBinding->ritType))
|
||
|
|
{
|
||
|
|
// Note that in the multihop case, we just overwrite value
|
||
|
|
SetRouteP2P(pRoute);
|
||
|
|
/*
|
||
|
|
ipRoute->RR_NextHopAddress.N_NetNumber =
|
||
|
|
RtlUlongByteSwap(pBinding->dwIfIndex);
|
||
|
|
|
||
|
|
ipRoute->RR_NextHopAddress.N_NetMask = ALL_ONES_MASK;
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
//
|
||
|
|
// If the next hop mask is not set, we need to do so now. Normally
|
||
|
|
// this shouldnt happen
|
||
|
|
//
|
||
|
|
|
||
|
|
#if ROUTE_DBG
|
||
|
|
|
||
|
|
if(!(ipRoute->RR_NextHopAddress.N_NetMask))
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**WARNING:Route doesnt seem to have any next hop mask**");
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // ROUTE_DBG
|
||
|
|
*/
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now we figure out if the route is a direct route or indirect routes
|
||
|
|
// Routes over unconnected demand dial routes are marked OTHER
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// For connected WAN interfaces (P2P with mask of 255.255.255.255) we
|
||
|
|
// do two checks:
|
||
|
|
// The next hop should be local address or remote address.
|
||
|
|
// AR: We used to do the above check but removed it because when
|
||
|
|
// we set a route over a disconnected interface, we dont
|
||
|
|
// know the address of the remote endpoint
|
||
|
|
// If the dest is remote address, then the MASK must be all ONES
|
||
|
|
// We mark all valid routes as DIRECT
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// For LAN interfaces and WAN with non all ones mask, we check the
|
||
|
|
// following:
|
||
|
|
// A direct route to a host to must have the Destination as the NextHop
|
||
|
|
// A direct route to a network to must have the the NextHop as one of the
|
||
|
|
// local interfaces
|
||
|
|
// The next hop must be on the same subnet as one of the bindings
|
||
|
|
//
|
||
|
|
|
||
|
|
dwType = IRE_TYPE_OTHER;
|
||
|
|
|
||
|
|
if(pBinding->bBound and IsRouteValid(pRoute))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Comment this block out - as we validate this
|
||
|
|
// next hop for the LAN case below, and dont care
|
||
|
|
// what it is in the WAN case as we set it to 0.
|
||
|
|
//
|
||
|
|
/*
|
||
|
|
//
|
||
|
|
// So outgoing interface has a valid address
|
||
|
|
// and next hop should have been plumbed in
|
||
|
|
//
|
||
|
|
if(nexthop && (destAddr is nexthop))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// A direct host route
|
||
|
|
//
|
||
|
|
|
||
|
|
if(destMask isnot HOST_ROUTE_MASK)
|
||
|
|
{
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
|
||
|
|
Trace0(ERR,
|
||
|
|
"ValidateRoute: Host route with wrong mask");
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
dwType = IRE_TYPE_DIRECT;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
if((pBinding->dwNumAddresses is 1) and
|
||
|
|
(pBinding->rgibBinding[0].dwMask is ALL_ONES_MASK))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// route over P2P link.
|
||
|
|
// Set it to indirect and mark it as a P2P route
|
||
|
|
//
|
||
|
|
|
||
|
|
dwType = IRE_TYPE_DIRECT;
|
||
|
|
|
||
|
|
//IpRtAssert(IsRouteP2P(pRoute));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// A route over a non P2P link possibly unnumbered
|
||
|
|
//
|
||
|
|
|
||
|
|
bValidNHop = FALSE;
|
||
|
|
|
||
|
|
dwType = IRE_TYPE_INDIRECT;
|
||
|
|
|
||
|
|
for(j = 0; j < pBinding->dwNumAddresses; j++)
|
||
|
|
{
|
||
|
|
dwLocalMask = pBinding->rgibBinding[j].dwMask;
|
||
|
|
|
||
|
|
dwLocalNet = pBinding->rgibBinding[j].dwAddress & dwLocalMask;
|
||
|
|
|
||
|
|
if((dwLocalNet is (destAddr & dwLocalMask)) or
|
||
|
|
(nexthop is IP_LOOPBACK_ADDRESS) or
|
||
|
|
//(nexthop is dwLocalNet) or
|
||
|
|
(nexthop is pBinding->rgibBinding[i].dwAddress))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Route to local net or over loopback
|
||
|
|
//
|
||
|
|
|
||
|
|
dwType = IRE_TYPE_DIRECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(((nexthop & dwLocalMask) is dwLocalNet) or
|
||
|
|
((nexthop is IP_LOOPBACK_ADDRESS)))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Next hop is on local net or loopback
|
||
|
|
// That is good
|
||
|
|
//
|
||
|
|
|
||
|
|
bValidNHop = TRUE;
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!bValidNHop and
|
||
|
|
pBinding->dwNumAddresses and
|
||
|
|
(pBinding->ritType isnot ROUTER_IF_TYPE_INTERNAL))
|
||
|
|
{
|
||
|
|
Trace1(ERR,
|
||
|
|
"ValidateRoute: Nexthop %d.%d.%d.%d not on network",
|
||
|
|
PRINT_IPADDR(nexthop));
|
||
|
|
|
||
|
|
for(j = 0; j < pBinding->dwNumAddresses; j++)
|
||
|
|
{
|
||
|
|
Trace3(ROUTE,"AdapterId: %d, %d.%d.%d.%d/%d.%d.%d.%d",
|
||
|
|
pBinding->dwIfIndex,
|
||
|
|
PRINT_IPADDR(pBinding->rgibBinding[j].dwAddress),
|
||
|
|
PRINT_IPADDR(pBinding->rgibBinding[j].dwMask));
|
||
|
|
}
|
||
|
|
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
|
||
|
|
return ERROR_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
#if ROUTE_DBG
|
||
|
|
|
||
|
|
if(ipRoute->RR_NextHopAddress.N_NetMask isnot dwLocalMask)
|
||
|
|
{
|
||
|
|
Trace0(ERR,
|
||
|
|
"**WARNING:Route doesnt seem to have the right next hop mask**");
|
||
|
|
|
||
|
|
PrintRoute(ERR,ipRoute);
|
||
|
|
|
||
|
|
ipRoute->RR_NextHopAddress.N_NetMask = dwLocalMask;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // ROUTE_DBG
|
||
|
|
*/
|
||
|
|
|
||
|
|
// *** Exclusion End ***
|
||
|
|
EXIT_LOCK(BINDING_LIST);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set the appropriate route flags in the route - stack flag etc.
|
||
|
|
//
|
||
|
|
|
||
|
|
// pRoute->Flags1 |= IP_STACK_ROUTE;
|
||
|
|
|
||
|
|
g_LastUpdateTable[IPFORWARDCACHE] = 0;
|
||
|
|
|
||
|
|
return NO_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
DWORD
|
||
|
|
WINAPI
|
||
|
|
ValidateRouteForProtocolEx(
|
||
|
|
IN DWORD dwProtoId,
|
||
|
|
IN PVOID pRouteInfo,
|
||
|
|
IN PVOID pDestAddr OPTIONAL
|
||
|
|
)
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
This function is called by the router Manger (and indirectly by routing
|
||
|
|
protocols) to validate the route info. We set the preference and the
|
||
|
|
type of the route
|
||
|
|
|
||
|
|
Locks:
|
||
|
|
|
||
|
|
Acquires the binding lock
|
||
|
|
This function CAN NOT acquire the ICB lock
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
dwProtoId Protocols Id
|
||
|
|
pRoute
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
NO_ERROR
|
||
|
|
RtmError code
|
||
|
|
|
||
|
|
--*/
|
||
|
|
{
|
||
|
|
DWORD dwResult;
|
||
|
|
|
||
|
|
dwResult = ValidateRouteForProtocol(
|
||
|
|
dwProtoId,
|
||
|
|
pRouteInfo,
|
||
|
|
pDestAddr
|
||
|
|
);
|
||
|
|
|
||
|
|
if (dwResult is NO_ERROR)
|
||
|
|
{
|
||
|
|
((PRTM_ROUTE_INFO)pRouteInfo)->Flags1 |= IP_STACK_ROUTE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return dwResult;
|
||
|
|
}
|
||
|
|
|