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914 lines
17 KiB
914 lines
17 KiB
/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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rtmif.c
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Abstract:
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Static & local routes management functions
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Author:
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Stefan Solomon 03/13/1995
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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extern UCHAR bcastnode[6];
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INT
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NetNumCmpFunc(PDWORD Net1,
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PDWORD Net2);
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INT
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NextHopAddrCmpFunc(PRTM_IPX_ROUTE Route1p,
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PRTM_IPX_ROUTE Route2p);
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BOOL
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FamSpecDataCmpFunc(PRTM_IPX_ROUTE Route1p,
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PRTM_IPX_ROUTE Route2p);
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INT
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NetNumHashFunc(PDWORD Net);
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INT
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RouteMetricCmpFunc(PRTM_IPX_ROUTE Route1p,
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PRTM_IPX_ROUTE Route2p);
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DWORD
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RouteValidateFunc(PRTM_IPX_ROUTE Routep);
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RTM_PROTOCOL_FAMILY_CONFIG Config = {
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0,
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0,
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sizeof(RTM_IPX_ROUTE),
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NetNumCmpFunc,
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NextHopAddrCmpFunc,
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FamSpecDataCmpFunc,
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RouteMetricCmpFunc,
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NetNumHashFunc,
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RouteValidateFunc,
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FwUpdateRouteTable
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};
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USHORT
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tickcount(UINT linkspeed);
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/*++
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Function: CreateRouteTable
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Descr: Creates the IPX route table in RTM
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--*/
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DWORD
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CreateRouteTable(VOID)
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{
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DWORD rc;
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Config.RPFC_MaxTableSize = MaxRoutingTableSize;
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Config.RPFC_HashSize = RoutingTableHashSize;
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rc = RtmCreateRouteTable(
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RTM_PROTOCOL_FAMILY_IPX,
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&Config);
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return rc;
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}
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/*++
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Function: DeleteRouteTable
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Descr: Creates the IPX route table in RTM
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--*/
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DWORD
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DeleteRouteTable(VOID)
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{
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DWORD rc;
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rc = RtmDeleteRouteTable(RTM_PROTOCOL_FAMILY_IPX);
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return rc;
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}
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/*++
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Function: StaticToRtmRoute
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Descr: Creates a RTM IPX route entry out of an IPX_STATIC_ROUTE_INFO
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--*/
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VOID
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StaticToRtmRoute(PRTM_IPX_ROUTE RtmRoutep,
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ULONG IfIndex,
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PIPX_STATIC_ROUTE_INFO StaticRouteInfop)
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{
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RtmRoutep->R_Interface = IfIndex;
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RtmRoutep->R_Protocol = IPX_PROTOCOL_STATIC;
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GETLONG2ULONG(&RtmRoutep->R_Network, StaticRouteInfop->Network);
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RtmRoutep->R_TickCount = StaticRouteInfop->TickCount;
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RtmRoutep->R_HopCount = StaticRouteInfop->HopCount;
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memcpy(RtmRoutep->R_NextHopMacAddress,
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StaticRouteInfop->NextHopMacAddress,
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6);
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RtmRoutep->R_Flags = 0;
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}
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VOID
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RtmToStaticRoute(PIPX_STATIC_ROUTE_INFO StaticRouteInfop,
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PRTM_IPX_ROUTE RtmRoutep)
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{
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PUTULONG2LONG(StaticRouteInfop->Network, RtmRoutep->R_Network);
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StaticRouteInfop->TickCount = (USHORT)(RtmRoutep->R_TickCount);
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StaticRouteInfop->HopCount = RtmRoutep->R_HopCount;
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memcpy(StaticRouteInfop->NextHopMacAddress,
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RtmRoutep->R_NextHopMacAddress,
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6);
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}
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VOID
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RtmToIpxRoute(PIPX_ROUTE IpxRoutep,
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PRTM_IPX_ROUTE RtmRoutep)
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{
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IpxRoutep->InterfaceIndex = (ULONG)(RtmRoutep->R_Interface);
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IpxRoutep->Protocol = RtmRoutep->R_Protocol;
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PUTULONG2LONG(IpxRoutep->Network, RtmRoutep->R_Network);
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IpxRoutep->TickCount = (USHORT)(RtmRoutep->R_TickCount);
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IpxRoutep->HopCount = RtmRoutep->R_HopCount;
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memcpy(IpxRoutep->NextHopMacAddress,
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RtmRoutep->R_NextHopMacAddress,
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6);
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IpxRoutep->Flags = RtmRoutep->R_Flags;
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}
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DWORD
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CreateStaticRoute(PICB icbp,
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PIPX_STATIC_ROUTE_INFO StaticRouteInfop)
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{
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DWORD rc, flags;
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RTM_IPX_ROUTE RtmRoute;
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StaticToRtmRoute(&RtmRoute, icbp->InterfaceIndex, StaticRouteInfop);
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if (icbp->AdminState==ADMIN_STATE_DISABLED)
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RtmRoute.R_Flags = DO_NOT_ADVERTISE_ROUTE;
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rc = RtmAddRoute(RtmStaticHandle,
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&RtmRoute,
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INFINITE,
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&flags,
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NULL,
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NULL);
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SS_ASSERT(rc == NO_ERROR);
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if (icbp->AdminState==ADMIN_STATE_DISABLED) {
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DisableStaticRoute (icbp->InterfaceIndex, StaticRouteInfop->Network);
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RtmRoute.R_Flags = 0;
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rc = RtmAddRoute(RtmStaticHandle,
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&RtmRoute,
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INFINITE,
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&flags,
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NULL,
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NULL);
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SS_ASSERT (rc == NO_ERROR);
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}
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return rc;
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}
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DWORD
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DeleteStaticRoute(ULONG IfIndex,
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PIPX_STATIC_ROUTE_INFO StaticRouteInfop)
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{
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DWORD rc;
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DWORD RtmFlags;
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RTM_IPX_ROUTE RtmRoute;
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StaticToRtmRoute(&RtmRoute, IfIndex, StaticRouteInfop);
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rc = RtmDeleteRoute(RtmStaticHandle,
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&RtmRoute,
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&RtmFlags,
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NULL
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);
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SS_ASSERT(rc == NO_ERROR);
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return rc;
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}
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VOID
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DeleteAllStaticRoutes(ULONG InterfaceIndex)
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{
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RTM_IPX_ROUTE RtmCriteriaRoute;
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Trace(ROUTE_TRACE, "DeleteAllStaticRoutes: Entered for if # %d\n", InterfaceIndex);
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memset(&RtmCriteriaRoute,
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0,
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sizeof(RTM_IPX_ROUTE));
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RtmCriteriaRoute.R_Interface = InterfaceIndex;
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RtmCriteriaRoute.R_Protocol = IPX_PROTOCOL_STATIC;
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RtmBlockDeleteRoutes(RtmStaticHandle,
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RTM_ONLY_THIS_INTERFACE,
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&RtmCriteriaRoute);
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}
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VOID
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LocalToRtmRoute(PRTM_IPX_ROUTE RtmRoutep,
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PICB icbp)
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{
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RtmRoutep->R_Interface = icbp->InterfaceIndex;
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RtmRoutep->R_Protocol = IPX_PROTOCOL_LOCAL;
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GETLONG2ULONG(&RtmRoutep->R_Network, icbp->acbp->AdapterInfo.Network);
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RtmRoutep->R_TickCount = tickcount(icbp->acbp->AdapterInfo.LinkSpeed);
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RtmRoutep->R_HopCount = 1;
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memset(RtmRoutep->R_NextHopMacAddress,
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0,
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6);
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// if this is a local workstation dialout interface, then do not
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// advertise this route over any protocol
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if(icbp->MIBInterfaceType == IF_TYPE_ROUTER_WORKSTATION_DIALOUT) {
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RtmRoutep->R_Flags = DO_NOT_ADVERTISE_ROUTE;
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}
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else
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{
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RtmRoutep->R_Flags = 0;
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}
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}
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DWORD
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CreateLocalRoute(PICB icbp)
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{
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DWORD rc, flags;
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RTM_IPX_ROUTE RtmRoute;
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if(!memcmp(icbp->acbp->AdapterInfo.Network, nullnet, 4)) {
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Trace(ROUTE_TRACE, "CreateLocalRoute: Can't create local NULL route !\n");
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return NO_ERROR;
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}
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LocalToRtmRoute(&RtmRoute, icbp);
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rc = RtmAddRoute(RtmLocalHandle,
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&RtmRoute,
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INFINITE,
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&flags,
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NULL,
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NULL);
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SS_ASSERT(rc == NO_ERROR);
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return rc;
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}
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DWORD
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DeleteLocalRoute(PICB icbp)
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{
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DWORD rc;
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RTM_IPX_ROUTE RtmRoute;
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DWORD RtmFlags;
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LocalToRtmRoute(&RtmRoute, icbp);
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rc = RtmDeleteRoute(RtmLocalHandle,
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&RtmRoute,
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&RtmFlags,
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NULL);
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SS_ASSERT(rc == NO_ERROR);
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return rc;
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}
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VOID
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GlobalToRtmRoute(PRTM_IPX_ROUTE RtmRoutep,
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PUCHAR Network)
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{
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RtmRoutep->R_Interface = GLOBAL_INTERFACE_INDEX;
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RtmRoutep->R_Protocol = IPX_PROTOCOL_LOCAL;
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GETLONG2ULONG(&RtmRoutep->R_Network, Network);
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RtmRoutep->R_TickCount = 15; // a good default value -> should be a config param ??? !!!
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RtmRoutep->R_HopCount = 1;
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memset(RtmRoutep->R_NextHopMacAddress, 0, 6);
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RtmRoutep->R_Flags = GLOBAL_WAN_ROUTE;
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}
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/*++
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Function: CreateGlobalRoute
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Descr: Creates a route which doesn't have a corresponding interface
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but represents a set of interfaces (e.g. all client wan
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interfaces).
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The interface index for this route is the "global interface"
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index.
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--*/
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DWORD
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CreateGlobalRoute(PUCHAR Network)
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{
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DWORD rc, flags;
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RTM_IPX_ROUTE RtmRoute;
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Trace(ROUTE_TRACE, "CreateGlobalRoute: Entered for route %.2x%.2x%.2x%.2x\n",
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Network[0],
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Network[1],
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Network[2],
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Network[3]);
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GlobalToRtmRoute(&RtmRoute, Network);
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rc = RtmAddRoute(RtmLocalHandle,
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&RtmRoute,
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INFINITE,
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&flags,
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NULL,
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NULL);
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SS_ASSERT(rc == NO_ERROR);
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return rc;
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}
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DWORD
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DeleteGlobalRoute(PUCHAR Network)
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{
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DWORD rc;
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RTM_IPX_ROUTE RtmRoute;
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DWORD RtmFlags;
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Trace(ROUTE_TRACE, "DeleteGlobalRoute: Entered for route %.2x%.2x%.2x%.2x\n",
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Network[0],
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Network[1],
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Network[2],
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Network[3]);
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GlobalToRtmRoute(&RtmRoute, Network);
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rc = RtmDeleteRoute(RtmLocalHandle,
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&RtmRoute,
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&RtmFlags,
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NULL);
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SS_ASSERT(rc == NO_ERROR);
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return rc;
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}
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DWORD
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GetRoute(ULONG RoutingTable,
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PIPX_ROUTE IpxRoutep)
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{
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RTM_IPX_ROUTE RtmRoute;
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DWORD EnumFlags;
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DWORD rc;
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switch(RoutingTable) {
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case IPX_DEST_TABLE:
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EnumFlags = RTM_ONLY_THIS_NETWORK |
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RTM_ONLY_BEST_ROUTES | RTM_INCLUDE_DISABLED_ROUTES;
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GETLONG2ULONG(&RtmRoute.R_Network, IpxRoutep->Network);
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break;
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case IPX_STATIC_ROUTE_TABLE:
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EnumFlags = RTM_ONLY_THIS_NETWORK |
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RTM_ONLY_THIS_INTERFACE |
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RTM_ONLY_THIS_PROTOCOL |
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RTM_INCLUDE_DISABLED_ROUTES;
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RtmRoute.R_Interface = (IpxRoutep->InterfaceIndex);
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RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
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GETLONG2ULONG(&RtmRoute.R_Network, IpxRoutep->Network);
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break;
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default:
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SS_ASSERT(FALSE);
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return ERROR_INVALID_PARAMETER;
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break;
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}
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rc = RtmGetFirstRoute(
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RTM_PROTOCOL_FAMILY_IPX,
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EnumFlags,
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&RtmRoute);
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RtmToIpxRoute(IpxRoutep, &RtmRoute);
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return rc;
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}
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/*++
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Function: IsRoute
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Descr: returns TRUE if there is a route to the specified
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network
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--*/
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BOOL
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IsRoute(PUCHAR Network)
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{
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RTM_IPX_ROUTE RtmRoute;
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DWORD EnumFlags;
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DWORD rc;
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EnumFlags = RTM_ONLY_THIS_NETWORK |
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RTM_ONLY_BEST_ROUTES |
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RTM_INCLUDE_DISABLED_ROUTES;
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GETLONG2ULONG(&RtmRoute.R_Network, Network);
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rc = RtmGetFirstRoute(
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RTM_PROTOCOL_FAMILY_IPX,
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EnumFlags,
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&RtmRoute);
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if(rc == NO_ERROR) {
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return TRUE;
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}
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return FALSE;
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}
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//********************************************************************************
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// *
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// Fast Enumeration Functions - Used by the Router Manager for internal purposes *
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// *
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//********************************************************************************
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HANDLE
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CreateStaticRoutesEnumHandle(ULONG InterfaceIndex)
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{
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RTM_IPX_ROUTE EnumCriteriaRoute;
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HANDLE EnumHandle;
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memset(&EnumCriteriaRoute, 0, sizeof(RTM_IPX_ROUTE));
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EnumCriteriaRoute.R_Interface = InterfaceIndex;
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EnumCriteriaRoute.R_Protocol = IPX_PROTOCOL_STATIC;
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EnumHandle = RtmCreateEnumerationHandle(RTM_PROTOCOL_FAMILY_IPX,
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RTM_ONLY_THIS_INTERFACE | RTM_ONLY_THIS_PROTOCOL | RTM_INCLUDE_DISABLED_ROUTES,
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&EnumCriteriaRoute);
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if((EnumHandle == NULL) && (GetLastError() != ERROR_NO_ROUTES)) {
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Trace(ROUTE_TRACE, "CreateStaticRoutesEnumHandle: RtmCreateEnumerationHandle failed with %d\n", GetLastError());
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SS_ASSERT(FALSE);
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}
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return EnumHandle;
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}
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DWORD
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GetNextStaticRoute(HANDLE EnumHandle,
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PIPX_STATIC_ROUTE_INFO StaticRtInfop)
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{
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RTM_IPX_ROUTE RtmRoute;
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DWORD rc;
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rc = RtmEnumerateGetNextRoute(EnumHandle,
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&RtmRoute);
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SS_ASSERT((rc == NO_ERROR) || (rc == ERROR_NO_MORE_ROUTES));
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RtmToStaticRoute(StaticRtInfop, &RtmRoute);
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return rc;
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}
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VOID
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CloseStaticRoutesEnumHandle(HANDLE EnumHandle)
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{
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if(EnumHandle) {
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RtmCloseEnumerationHandle(EnumHandle);
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}
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}
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|
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//********************************************************************************
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// *
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// Slow Enumeration Functions - Used by the Router Manager for MIB APIs support *
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// *
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//********************************************************************************
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DWORD
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GetFirstRoute(ULONG RoutingTable,
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PIPX_ROUTE IpxRoutep)
|
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{
|
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RTM_IPX_ROUTE RtmRoute;
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DWORD EnumFlags;
|
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DWORD rc;
|
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|
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|
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switch(RoutingTable) {
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|
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case IPX_DEST_TABLE:
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// get the first route in the best routes table
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EnumFlags = RTM_ONLY_BEST_ROUTES | RTM_INCLUDE_DISABLED_ROUTES;
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break;
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case IPX_STATIC_ROUTE_TABLE:
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// get the first route in the static routes table for this
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// interface
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EnumFlags = RTM_ONLY_THIS_INTERFACE | RTM_ONLY_THIS_PROTOCOL | RTM_INCLUDE_DISABLED_ROUTES;
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RtmRoute.R_Interface = IpxRoutep->InterfaceIndex;
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RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
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break;
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default:
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SS_ASSERT(FALSE);
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return ERROR_INVALID_PARAMETER;
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break;
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}
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|
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rc = RtmGetFirstRoute(
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RTM_PROTOCOL_FAMILY_IPX,
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EnumFlags,
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&RtmRoute);
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|
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RtmToIpxRoute(IpxRoutep, &RtmRoute);
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return rc;
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}
|
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|
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|
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DWORD
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GetNextRoute(ULONG RoutingTable,
|
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PIPX_ROUTE IpxRoutep)
|
|
{
|
|
RTM_IPX_ROUTE RtmRoute;
|
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DWORD EnumFlags;
|
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DWORD rc;
|
|
|
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ZeroMemory(&RtmRoute, sizeof(RtmRoute));
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GETLONG2ULONG(&RtmRoute.R_Network, IpxRoutep->Network);
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|
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switch(RoutingTable) {
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|
|
case IPX_DEST_TABLE:
|
|
|
|
// get next route in the best routes table
|
|
EnumFlags = RTM_ONLY_BEST_ROUTES | RTM_INCLUDE_DISABLED_ROUTES;
|
|
break;
|
|
|
|
case IPX_STATIC_ROUTE_TABLE:
|
|
|
|
// get next route in the static routes table for this interface
|
|
EnumFlags = RTM_ONLY_THIS_INTERFACE | RTM_ONLY_THIS_PROTOCOL | RTM_INCLUDE_DISABLED_ROUTES;
|
|
RtmRoute.R_Interface = (IpxRoutep->InterfaceIndex);
|
|
RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
|
|
memcpy(RtmRoute.R_NextHopMacAddress, bcastnode, 6);
|
|
break;
|
|
|
|
default:
|
|
|
|
SS_ASSERT(FALSE);
|
|
return ERROR_INVALID_PARAMETER;
|
|
break;
|
|
}
|
|
|
|
rc = RtmGetNextRoute(
|
|
RTM_PROTOCOL_FAMILY_IPX,
|
|
EnumFlags,
|
|
&RtmRoute);
|
|
|
|
RtmToIpxRoute(IpxRoutep, &RtmRoute);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
//
|
|
// Convert routes added by updating routes protocol to static routes
|
|
//
|
|
|
|
/*++
|
|
|
|
Function: ConvertProtocolRoutesToStatic
|
|
|
|
Descr:
|
|
|
|
--*/
|
|
|
|
VOID
|
|
ConvertAllProtocolRoutesToStatic(ULONG InterfaceIndex,
|
|
ULONG RoutingProtocolId)
|
|
{
|
|
RTM_IPX_ROUTE RtmRoute;
|
|
DWORD EnumFlags;
|
|
DWORD rc;
|
|
|
|
EnumFlags = RTM_ONLY_THIS_INTERFACE | RTM_ONLY_THIS_PROTOCOL;
|
|
|
|
memset(&RtmRoute, 0, sizeof(RTM_IPX_ROUTE));
|
|
|
|
RtmRoute.R_Interface = InterfaceIndex;
|
|
RtmRoute.R_Protocol = RoutingProtocolId;
|
|
|
|
rc = RtmBlockConvertRoutesToStatic(
|
|
RtmStaticHandle,
|
|
EnumFlags,
|
|
&RtmRoute);
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
DisableStaticRoutes(ULONG InterfaceIndex)
|
|
{
|
|
RTM_IPX_ROUTE RtmRoute;
|
|
DWORD EnumFlags;
|
|
DWORD rc;
|
|
|
|
EnumFlags = RTM_ONLY_THIS_INTERFACE;
|
|
|
|
memset(&RtmRoute, 0, sizeof(RTM_IPX_ROUTE));
|
|
|
|
RtmRoute.R_Interface = InterfaceIndex;
|
|
RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
|
|
|
|
rc = RtmBlockDisableRoutes(
|
|
RtmStaticHandle,
|
|
EnumFlags,
|
|
&RtmRoute);
|
|
return;
|
|
}
|
|
|
|
|
|
VOID
|
|
DisableStaticRoute(ULONG InterfaceIndex, PUCHAR Network)
|
|
{
|
|
RTM_IPX_ROUTE RtmRoute;
|
|
DWORD EnumFlags;
|
|
DWORD rc;
|
|
|
|
EnumFlags = RTM_ONLY_THIS_INTERFACE|RTM_ONLY_THIS_NETWORK;
|
|
|
|
memset(&RtmRoute, 0, sizeof(RTM_IPX_ROUTE));
|
|
|
|
RtmRoute.R_Interface = InterfaceIndex;
|
|
RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
|
|
GETLONG2ULONG(&RtmRoute.R_Network, Network);
|
|
|
|
rc = RtmBlockDisableRoutes(
|
|
RtmStaticHandle,
|
|
EnumFlags,
|
|
&RtmRoute);
|
|
return;
|
|
}
|
|
|
|
|
|
VOID
|
|
EnableStaticRoutes(ULONG InterfaceIndex)
|
|
{
|
|
RTM_IPX_ROUTE RtmRoute;
|
|
DWORD EnumFlags;
|
|
DWORD rc;
|
|
|
|
EnumFlags = RTM_ONLY_THIS_INTERFACE;
|
|
|
|
memset(&RtmRoute, 0, sizeof(RTM_IPX_ROUTE));
|
|
|
|
RtmRoute.R_Interface = InterfaceIndex;
|
|
RtmRoute.R_Protocol = IPX_PROTOCOL_STATIC;
|
|
|
|
rc = RtmBlockReenableRoutes(
|
|
RtmStaticHandle,
|
|
EnumFlags,
|
|
&RtmRoute);
|
|
return;
|
|
}
|
|
|
|
/*++
|
|
|
|
Function: GetStaticRoutesCount
|
|
|
|
Descr: returns the number of static routes associated with this if
|
|
|
|
--*/
|
|
|
|
DWORD
|
|
GetStaticRoutesCount(ULONG InterfaceIndex)
|
|
{
|
|
HANDLE EnumHandle;
|
|
DWORD rc, Count = 0;
|
|
IPX_STATIC_ROUTE_INFO StaticRtInfo;
|
|
|
|
EnumHandle = CreateStaticRoutesEnumHandle(InterfaceIndex);
|
|
|
|
if(EnumHandle != NULL) {
|
|
|
|
while(GetNextStaticRoute(EnumHandle, &StaticRtInfo) == NO_ERROR) {
|
|
|
|
Count++;
|
|
}
|
|
|
|
CloseStaticRoutesEnumHandle(EnumHandle);
|
|
}
|
|
|
|
return Count;
|
|
}
|
|
|
|
INT
|
|
NetNumCmpFunc(PDWORD Net1,
|
|
PDWORD Net2)
|
|
{
|
|
if(*Net1 > *Net2) {
|
|
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
if(*Net1 == *Net2) {
|
|
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
INT
|
|
NextHopAddrCmpFunc(PRTM_IPX_ROUTE Route1p,
|
|
PRTM_IPX_ROUTE Route2p)
|
|
{
|
|
return ( memcmp(Route1p->R_NextHopMacAddress,
|
|
Route2p->R_NextHopMacAddress,
|
|
6)
|
|
);
|
|
}
|
|
|
|
BOOL
|
|
FamSpecDataCmpFunc(PRTM_IPX_ROUTE Route1p,
|
|
PRTM_IPX_ROUTE Route2p)
|
|
{
|
|
if((Route1p->R_Flags == Route2p->R_Flags) &&
|
|
(Route1p->R_TickCount == Route2p->R_TickCount) &&
|
|
(Route1p->R_HopCount == Route2p->R_HopCount)) {
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
INT
|
|
NetNumHashFunc(PDWORD Net)
|
|
{
|
|
return (*Net % RoutingTableHashSize);
|
|
}
|
|
|
|
INT
|
|
RouteMetricCmpFunc(PRTM_IPX_ROUTE Route1p,
|
|
PRTM_IPX_ROUTE Route2p)
|
|
{
|
|
// if either route has 16 hops, it is the worst, no matter how many ticks
|
|
if((Route1p->R_HopCount == 16) && (Route2p->R_HopCount == 16)) {
|
|
|
|
return 0;
|
|
}
|
|
|
|
if(Route1p->R_HopCount == 16) {
|
|
|
|
return 1;
|
|
}
|
|
|
|
if(Route2p->R_HopCount == 16) {
|
|
|
|
return -1;
|
|
}
|
|
|
|
// shortest number of ticks is the best route
|
|
if(Route1p->R_TickCount < Route2p->R_TickCount) {
|
|
|
|
return -1;
|
|
}
|
|
|
|
if(Route1p->R_TickCount > Route2p->R_TickCount) {
|
|
|
|
return 1;
|
|
}
|
|
|
|
// if two routes exist with equal tick count values, the one with
|
|
// the least hops should be used
|
|
if(Route1p->R_HopCount < Route2p->R_HopCount) {
|
|
|
|
return -1;
|
|
}
|
|
|
|
if(Route1p->R_HopCount > Route2p->R_HopCount) {
|
|
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DWORD
|
|
RouteValidateFunc(PRTM_IPX_ROUTE Routep)
|
|
{
|
|
return NO_ERROR;
|
|
}
|
|
|
|
/*++
|
|
|
|
Function: tickcount
|
|
|
|
Descr: gets nr of ticks to send a 576 bytes packet over this link
|
|
|
|
Argument: link speed as a multiple of 100 bps
|
|
|
|
--*/
|
|
|
|
USHORT
|
|
tickcount(UINT linkspeed)
|
|
{
|
|
USHORT tc;
|
|
|
|
if(linkspeed == 0) {
|
|
|
|
return 1;
|
|
}
|
|
|
|
if(linkspeed >= 10000) {
|
|
|
|
// link speed >= 1M bps
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
// compute the necessary time to send a 576 bytes packet over this
|
|
// line and express it as nr of ticks.
|
|
// One tick = 55ms
|
|
|
|
// time in ms to send 576 bytes (assuming 10 bits/byte for serial line)
|
|
tc = 57600 / linkspeed;
|
|
|
|
// in ticks
|
|
tc = tc / 55 + 1;
|
|
return tc;
|
|
}
|
|
}
|