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/********************************************************************//** Microsoft LAN Manager **//** Copyright(c) Microsoft Corp., 1990-1992 **//********************************************************************//* :ts=4 */
//** IPROUTE.H - IP routing definitions.
//
// This file contains all of the definitions for routing code that are
// visible to modules outside iproute.c
#pragma once
extern struct Interface *LookupNextHop(IPAddr Dest, IPAddr Src, IPAddr *FirstHop, uint *MTU);extern struct Interface *LookupNextHopWithBuffer(IPAddr Dest, IPAddr Src, IPAddr *FirstHop, uint *MTU, uchar Protocol, uchar *Buffer, uint Length, RouteCacheEntry **FwdRce, LinkEntry **Link, IPAddr HdrSrc, uint UnicastIf);
extern struct Interface *LookupForwardingNextHop(IPAddr Dest, IPAddr Src, IPAddr *FirstHop, uint *MTU, uchar Protocol, uchar *Buffer, uint Length, RouteCacheEntry **FwdRce, LinkEntry **Link, IPAddr HdrSrc);
extern void AddrTypeCacheFlush(IPAddr Address);extern uchar GetAddrType(IPAddr Address);extern uint InvalidSourceAddress(IPAddr Address);extern uchar GetLocalNTE(IPAddr Address, NetTableEntry **NTE);extern uchar IsBCastOnNTE(IPAddr Address, NetTableEntry *NTE);
extern void IPForwardPkt(NetTableEntry *SrcNTE, IPHeader UNALIGNED *Header, uint HeaderLength, void *Data, uint BufferLength, NDIS_HANDLE LContext1, uint LContext2, uchar DestType, uint MAcHdrSize, PNDIS_BUFFER pNdisBuffer, uint *pClientcnt, void *LinkCtxt);
extern void SendFWPacket(PNDIS_PACKET Packet, NDIS_STATUS Status, uint DataLength);
extern uint AttachRCEToRTE(RouteCacheEntry *RCE, uchar Protocol, uchar *Buffer, uint Length);extern void Redirect(NetTableEntry *NTE, IPAddr RDSrc, IPAddr Target, IPAddr Src, IPAddr FirstHop);extern IP_STATUS AddRoute(IPAddr Destination, IPMask Mask, IPAddr FirstHop, Interface *OutIF, uint MTU, uint Metric, uint Proto, uint AType, ROUTE_CONTEXT Context, uint SetWithRefcnt);extern IP_STATUS DeleteRoute(IPAddr Destination, IPMask Mask, IPAddr FirstHop, Interface *OutIF, uint SetWithRefcnt);extern IP_STATUS DeleteDest(IPAddr Dest, IPMask Mask);extern ROUTE_CONTEXT GetRouteContext(IPAddr Destination, IPAddr Source);
extern NetTableEntry *BestNTEForIF(IPAddr Dest, Interface *IF, BOOLEAN NoTransientAddr);extern void RTWalk(uint (*CallFunc)(struct RouteTableEntry *, void *, void *), void *Context, void *Context1);
extern uint DeleteRTEOnIF(struct RouteTableEntry *RTE, void *Context, void *Context1);extern uint DeleteAllRTEOnIF(struct RouteTableEntry *RTE, void *Context, void *Context1);extern uint InvalidateRCEOnIF(struct RouteTableEntry *RTE, void *Context, void *Context1);extern uint ConvertRTEType(struct RouteTableEntry *RTE, void *Context, void *Context1);
extern uint SetMTUOnIF(struct RouteTableEntry *RTE, void *Context, void *Context1);extern uint SetMTUToAddr(struct RouteTableEntry *RTE, void *Context, void *Context1);extern uint AddNTERoutes(struct NetTableEntry *NTE);extern uint DelNTERoutes(struct NetTableEntry *NTE);
extern void IPCheckRoute(IPAddr Dest, IPAddr Src, RouteCacheEntry *RCE, IPOptInfo *OptInfo, uint CheckRouteFlag);
extern void RouteFragNeeded(IPHeader UNALIGNED *IPH, ushort NewMTU);extern IP_STATUS IPGetPInfo(IPAddr Dest, IPAddr Src, uint *NewMTU, uint *MaxPathSpeed, RouteCacheEntry *RCE);extern int InitRouting(struct IPConfigInfo *ci);extern uint InitNTERouting(NetTableEntry *NTE, uint NumGWs, IPAddr *GW, uint *GWMetric);extern uint InitGateway(struct IPConfigInfo *ci);extern uint GetIfConstraint(IPAddr Dest, IPAddr Src, IPOptInfo *OptInfo, BOOLEAN fIpsec);extern IPAddr OpenRCE(IPAddr Address, IPAddr Src, RouteCacheEntry **RCE, uchar *Type, ushort *MSS, IPOptInfo *OptInfo);extern void CloseRCE(RouteCacheEntry *RCE);extern uint IsRouteICMP(IPAddr Dest, IPMask Mask, IPAddr FirstHop, Interface *OutIF);NTSTATUS GetIFAndLink(void *RCE, ULONG* IFIndex, IPAddr *NextHop);
extern void RtChangeNotifyCancel(PDEVICE_OBJECT DeviceObject, PIRP Irp);extern void RtChangeNotifyCancelEx(PDEVICE_OBJECT DeviceObject, PIRP Irp);extern void RtChangeNotify(IPRouteNotifyOutput *RNO);extern void RtChangeNotifyEx(IPRouteNotifyOutput *RNO);
extern void InvalidateRCELinks(struct RouteTableEntry *RTE);
extern CACHE_LINE_KSPIN_LOCK RouteTableLock;
extern LIST_ENTRY RtChangeNotifyQueue;extern LIST_ENTRY RtChangeNotifyQueueEx;
extern uint DeadGWDetect;extern uint PMTUDiscovery;extern uchar ForwardPackets;extern uchar RouterConfigured;
// Pointer to callout routine for dial on demand.
extern RefPtr DODRefPtr;
// Pointer to packet filter handler.
extern RefPtr FilterRefPtr;
extern BOOLEAN NotifyFilterOfDiscard(NetTableEntry* NTE, IPHeader UNALIGNED* IPH, uchar* Data, uint DataSize);extern FORWARD_ACTION DummyFilterPtr(struct IPHeader UNALIGNED* PacketHeader, uchar* Packet, uint PacketLength, uint RecvInterfaceIndex, uint SendInterfaceIndex, IPAddr RecvLinkNextHop, IPAddr SendLinkNextHop);extern void SetDummyFilterPtr(IPPacketFilterPtr FilterPtr);
extern uint RefFirewallQ(Queue** FirewallQ);extern void DerefFirewallQ(uint Handle);extern BOOLEAN ProcessFirewallQ(void);
// Pointer to IPSEC handler
extern IPSecHandlerRtn IPSecHandlerPtr;extern IPSecSendCompleteRtn IPSecSendCmpltPtr;
#define IPADDR_LOCAL 0xffffffff // Indicates that IP address is
// directly connected.
#define IP_LOCAL_BCST 0xffffffff
#define IP_ZERO_BCST 0
#define LOOPBACK_MSS 1500 // back to normal from
// W2K value (32768 - sizeof(IPHeader))
#define LOOPBACK_ADDR 0x0100007f
#define IP_LOOPBACK(x) (((x) & CLASSA_MASK) == 0x7f)
#define ATYPE_PERM 0 // A permanent route.
#define ATYPE_OVERRIDE 1 // Semi-permanent - can be
// overriden.
#define ATYPE_TEMP 2 // A temporary route.
#define MAX_IP_HDR_SIZE 60
#define ICMP_HEADER_SIZE 8
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