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Windows-Server-2003/net/netbt/sys/udpsend.c

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/*++
Copyright (c) 1989-1993 Microsoft Corporation
Module Name:
Udpsend.c
Abstract:
This file handles building udp(and Tcp) requests, formated to the Tdi specification
to pass to Tdiout. Tdiout formats the request in an Os specific manner and
passes it on to the transport.
This file handles name service type functions such as query name or
register name, datagram sends. It also handles building Tcp packets.
Author:
Jim Stewart (Jimst) 10-2-92
Revision History:
--*/
#include "precomp.h" // procedure headings
#include <ipinfo.h>
#include "udpsend.tmh"
VOID
SessionRespDone(
IN PVOID pContext,
IN NTSTATUS status,
IN ULONG lInfo);
VOID
NDgramSendCompleted(
PVOID pContext,
NTSTATUS status,
ULONG lInfo
);
//----------------------------------------------------------------------------
NTSTATUS
UdpSendNSBcast(
IN tNAMEADDR *pNameAddr,
IN PCHAR pScope,
IN tDGRAM_SEND_TRACKING *pTrackerRequest,
IN PVOID pTimeoutRoutine,
IN PVOID pClientContext,
IN PVOID pClientCompletion,
IN ULONG Retries,
IN ULONG Timeout,
IN enum eNSTYPE eNsType,
IN BOOL SendFlag
)
/*++
Routine Description:
This routine sends a name registration or a name query
as a broadcast on the subnet or directed to the name server.
Arguments:
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
tNAMEHDR *pNameHdr;
ULONG uLength;
CTELockHandle OldIrq;
ULONG UNALIGNED *pHdrIpAddress;
ULONG IpAddress;
USHORT Port;
USHORT NameType;
tDGRAM_SEND_TRACKING *pTrackerDgram;
tTIMERQENTRY *pTimerQEntry;
PFILE_OBJECT pFileObject;
tDEVICECONTEXT *pDeviceContext = pTrackerRequest->pDeviceContext;
COMPLETIONCLIENT pOldCompletion;
PVOID pOldContext;
if (pNameAddr->NameTypeState & (NAMETYPE_GROUP | NAMETYPE_INET_GROUP))
{
NameType = NBT_GROUP;
}
else
{
NameType = NBT_UNIQUE;
}
// build the correct type of pdu depending on the request type
status = GetTracker (&pTrackerDgram, NBT_TRACKER_SEND_NSBCAST);
if (!NT_SUCCESS(status))
{
return(STATUS_INSUFFICIENT_RESOURCES);
}
pHdrIpAddress = (ULONG UNALIGNED *)CreatePdu(pNameAddr->Name,
pScope,
0L, // we don't know the IP address yet
NameType,
eNsType,
(PVOID)&pNameHdr,
&uLength,
pTrackerRequest);
if (!pHdrIpAddress)
{
IF_DBG(NBT_DEBUG_NAMESRV)
KdPrint(("Nbt:Failed to Create Pdu to send to WINS PduType= %X\n", eNsType));
FreeTracker (pTrackerDgram, RELINK_TRACKER);
return(STATUS_INSUFFICIENT_RESOURCES);
}
//
// change the dgram header for name refreshes
//
if (eNsType == eNAME_REFRESH)
{
pNameHdr->OpCodeFlags = NbtConfig.OpRefresh;
}
else
if ( (eNsType == eNAME_QUERY)
#ifdef VXD
|| (eNsType == eDNS_NAME_QUERY)
#endif
)
{
pHdrIpAddress = NULL;
}
CTESpinLock(&NbtConfig.JointLock,OldIrq);
// fill in the Datagram hdr info in the tracker structure.
// There is never a client buffer to send.
//
// Set the fields here instead of after the timer is started
// since they may be accessed by the Timer completion function
//
pTrackerRequest->pNameAddr = pNameAddr;
pTrackerRequest->TransactionId = pNameHdr->TransactId; // save for response checks.
pTrackerDgram->SendBuffer.pDgramHdr = NULL; // to catch erroneous free's
pTrackerDgram->SendBuffer.pDgramHdr = pNameHdr;
pTrackerDgram->SendBuffer.HdrLength = uLength;
pTrackerDgram->SendBuffer.pBuffer = NULL;
pTrackerDgram->SendBuffer.Length = 0;
pTrackerDgram->pNameAddr = pNameAddr;
pTrackerDgram->pDeviceContext = pDeviceContext;
// start the timer now...We didn't start it before because it could
// have expired during the dgram setup, perhaps before the Tracker was
// fully setup.
//
if (Timeout)
{
//
// Before we over-write the current pTimer field in pNameAddr below,
// we need to check if there is any timer running, and if so, we will
// have to stop it right now
//
while (pTimerQEntry = pNameAddr->pTimer)
{
pNameAddr->pTimer = NULL;
status = StopTimer(pTimerQEntry, &pOldCompletion, &pOldContext);
if (pOldCompletion)
{
CTESpinFree(&NbtConfig.JointLock, OldIrq);
(*pOldCompletion) (pOldContext, STATUS_TIMEOUT);
CTESpinLock(&NbtConfig.JointLock, OldIrq);
}
}
status = StartTimer(pTimeoutRoutine,
Timeout,
(PVOID)pTrackerRequest, // context value
NULL,
pClientContext,
pClientCompletion,
pDeviceContext,
&pTimerQEntry,
(USHORT)Retries,
TRUE);
if (!NT_SUCCESS(status))
{
// we need to differentiate the timer failing versus lack
// of resources
CTESpinFree(&NbtConfig.JointLock,OldIrq);
CTEMemFree(pNameHdr);
FreeTracker(pTrackerDgram,RELINK_TRACKER);
return(STATUS_INVALID_PARAMETER_6);
}
//
// Cross link the nameaddr and the timer so we can stop the timer
// when the name query response occurs
//
pTimerQEntry->pCacheEntry = pNameAddr;
pNameAddr->pTimer = pTimerQEntry;
}
//
// Check the Flag value in the tracker and see if we should do a broadcast
// or a directed send to the name server
//
if (pTrackerRequest->Flags & NBT_BROADCAST)
{
//
// set the broadcast bit in the header to be ON since this may be
// an M or MS node that is changing to broadcast from directed sends.
//
((PUCHAR)pTrackerDgram->SendBuffer.pDgramHdr)[3] |= FL_BROADCAST_BYTE;
Port = NBT_NAMESERVICE_UDP_PORT;
IpAddress = pDeviceContext->BroadcastAddress;
}
else
{
//
// turn off the broadcast bit in the header since this may be
// an M or MS node that is changing to directed sends from broadcasts.
//
((PUCHAR)pTrackerDgram->SendBuffer.pDgramHdr)[3] &= ~FL_BROADCAST_BYTE;
// check for a zero first byte in the name passed to the name server
ASSERT(((PUCHAR)pTrackerDgram->SendBuffer.pDgramHdr)[12]);
//
// for Multihomed hosts, UNIQUE name registrations use a special new
// code (0x0F) to tell the name server this is a multihomed name that
// will have several ip addresses
//
if (NbtConfig.MultiHomed && ((eNsType == eNAME_REGISTRATION) && (NameType == NBT_UNIQUE)))
{
//
// if it is a multihomed host, then use a new special registration opcode (0xF)
//
((PUCHAR)pTrackerDgram->SendBuffer.pDgramHdr)[2] |= OP_REGISTER_MULTI;
}
Port = NbtConfig.NameServerPort;
// name srvr, backup name srvr, dns srvr, backup dnr srvr:which one?
if (pTrackerRequest->Flags & NBT_NAME_SERVER)
{
IpAddress = pDeviceContext->lNameServerAddress;
}
#ifdef MULTIPLE_WINS
//
// IMPORTANT: Check for NAME_SERVER_OTHERS flag has to be before check
// for NAME_SERVER_BACKUP flag, since both flags will be set when we
// we are querying "other" servers
//
else if (pTrackerRequest->Flags & NBT_NAME_SERVER_OTHERS) // Try "other" servers
{
if (0 == pTrackerRequest->NSOthersLeft) // Do LOOP_BACK
{
IpAddress = LOOP_BACK;
}
else
{
IpAddress = pTrackerRequest->pDeviceContext->lOtherServers[pTrackerRequest->NSOthersIndex];
}
}
#endif
else
#ifndef VXD
{
IpAddress = pDeviceContext->lBackupServer;
}
#else
if (pTrackerRequest->Flags & NBT_NAME_SERVER_BACKUP)
{
IpAddress = pDeviceContext->lBackupServer;
}
else
if (pTrackerRequest->Flags & NBT_DNS_SERVER)
{
IpAddress = pDeviceContext->lDnsServerAddress;
Port = NbtConfig.DnsServerPort;
}
else // ----- if (pTrackerRequest->Flags & NBT_DNS_SERVER_BACKUP) ----
{
IpAddress = pDeviceContext->lDnsBackupServer;
Port = NbtConfig.DnsServerPort;
}
#endif
//
// is it is a send to WINS on this machine
//
if (pNameHdr->AnCount == (UCHAR)WINS_SIGNATURE)
{
//
// on RAS links, we don't want to register with the local wins
// but with the wins that RAS told us about.
// (of course, if RAS didn't give us a wins address, at least
// register with the local guy!)
//
if ((pDeviceContext->IpInterfaceFlags & IP_INTFC_FLAG_P2P) && // Check for PointToPoint
(pDeviceContext->lNameServerAddress != LOOP_BACK))
{
// Don't do anything;
}
else
{
IpAddress = pDeviceContext->IpAddress;
}
}
}
ASSERT(pTrackerRequest->Flags);
// each adapter has a different source Ip address for registrations
// pHdrIpAddress will be NULL for NameQueries
if (pHdrIpAddress)
{
// If the Source IP address is to be different from the device we are
// sending the Datagram on, fill it in!
if (pTrackerRequest->Flags & NBT_USE_UNIQUE_ADDR)
{
*pHdrIpAddress = htonl(pTrackerRequest->RemoteIpAddress);
}
else
{
*pHdrIpAddress = htonl(pDeviceContext->IpAddress);
}
}
//
// in the event that DHCP has just removed the IP address, use a null
// FileObject to signal UdpSendDatagram not to do the send
// Also, if the device has been destroyed, dont send anything.
//
CTESpinFree(&NbtConfig.JointLock,OldIrq);
status = UdpSendDatagram(pTrackerDgram,
IpAddress,
NDgramSendCompleted,
pTrackerDgram,
Port,
(SendFlag ? NBT_NAME_SERVICE : 0));
if (!NT_SUCCESS(status))
{
//
// Since pTrackerDgram is associated only with the Datagram send,
// it should be free'ed here only!
//
FreeTracker (pTrackerDgram, FREE_HDR | RELINK_TRACKER);
}
return(status);
}
//----------------------------------------------------------------------------
PVOID
CreatePdu(
IN PCHAR pName,
IN PCHAR pScope,
IN ULONG IpAddress,
IN USHORT NameType,
IN enum eNSTYPE eNsType,
OUT PVOID *pHdrs,
OUT PULONG pLength,
IN tDGRAM_SEND_TRACKING *pTrackerRequest
)
/*++
Routine Description:
This routine builds a registration pdu
Arguments:
Return Value:
PULONG - a ptr to the ip address in the pdu so it can be filled in later
--*/
{
tNAMEHDR *pNameHdr;
ULONG uLength;
ULONG uScopeSize;
tGENERALRR *pGeneral;
CTELockHandle OldIrq;
#ifdef VXD
if ( (eNsType == eDNS_NAME_QUERY) || (eNsType == eDIRECT_DNS_NAME_QUERY) )
{
uScopeSize = domnamelen(pTrackerRequest->pchDomainName) + 1; // +1 for len byte
if (uScopeSize > 1)
{
uScopeSize++; // for the null byte
}
}
else
#endif
uScopeSize = strlen(pScope) +1; // +1 for null too
// size is size of the namehdr structure -1 for the NetbiosName[1]
// + the 32 bytes for the half ascii name +
// scope + size of the General RR structure
uLength = sizeof(tNAMEHDR) - 1
+ (NETBIOS_NAME_SIZE << 1)
+ uScopeSize;
if (eNsType == eNAME_QUERY)
{
uLength = uLength + sizeof(ULONG);
}
#ifdef VXD
// there is no half-ascii conversion in DNS. we added 32 bytes above, but
// we need only 16. so, subtract 16.
else if (eNsType == eDNS_NAME_QUERY)
{
uLength = uLength - NETBIOS_NAME_SIZE + sizeof(ULONG);
}
// This is a "raw" DNS name query. Substitute raw string length of pName
// for NETBIOS_NAME_SIZE.
else if (eNsType == eDIRECT_DNS_NAME_QUERY)
{
uLength = uLength - (NETBIOS_NAME_SIZE << 1) + sizeof(ULONG) + strlen(pName) + 1;
}
#endif
else
{
uLength += sizeof(tGENERALRR);
}
// Note that this memory must be deallocated when the send completes in
// tdiout.DgramSendCompletion
pNameHdr = NbtAllocMem((USHORT)uLength ,NBT_TAG('X'));
if (!pNameHdr)
{
return(NULL);
}
CTEZeroMemory((PVOID)pNameHdr,uLength);
//
// for resends of the same name query or name registration, do not increment
// the transaction id
//
if (pTrackerRequest->TransactionId)
{
pNameHdr->TransactId = pTrackerRequest->TransactionId;
}
else
{
pNameHdr->TransactId = htons(GetTransactId());
}
pNameHdr->QdCount = 1;
pNameHdr->AnCount = 0;
pNameHdr->NsCount = 0;
#ifdef VXD
if ((eNsType != eDNS_NAME_QUERY)&&(eNsType != eDIRECT_DNS_NAME_QUERY))
{
#endif
// Convert the name to half ascii and copy!! ... adding the scope too
pGeneral = (tGENERALRR *)ConvertToHalfAscii(
(PCHAR)&pNameHdr->NameRR.NameLength,
pName,
pScope,
uScopeSize);
pGeneral->Question.QuestionTypeClass = htonl(QUEST_NBINTERNET);
#ifdef VXD
}
#endif
*pHdrs = (PVOID)pNameHdr;
*pLength = uLength;
switch (eNsType)
{
#ifdef VXD
case eDNS_NAME_QUERY:
case eDIRECT_DNS_NAME_QUERY:
// copy the netbios name ... adding the scope too
pGeneral = (tGENERALRR *)DnsStoreName(
(PCHAR)&pNameHdr->NameRR.NameLength,
pName,
pTrackerRequest->pchDomainName,
eNsType);
pGeneral->Question.QuestionTypeClass = htonl(QUEST_DNSINTERNET);
pNameHdr->OpCodeFlags = (FL_RECURDESIRE);
pNameHdr->ArCount = 0;
// we just need to return something non-null to succeed.
return((PULONG)pNameHdr);
#endif
case eNAME_QUERY:
if (NodeType & BNODE)
{
pNameHdr->OpCodeFlags = (FL_BROADCAST | FL_RECURDESIRE);
}
else
pNameHdr->OpCodeFlags = (FL_RECURDESIRE);
pNameHdr->ArCount = 0;
// we just need to return something non-null to succeed.
return((PULONG)pNameHdr);
break;
case eNAME_REGISTRATION_OVERWRITE:
case eNAME_REFRESH:
case eNAME_REGISTRATION:
//
// The broadcast bit is set in UdpSendNSBcast so we don't
// need to set it here. - just set the op code, since the broadcast
// bit is a function of whether we are talking to the nameserver or doing
// a broadcast. This code handles the multi-homed case with a new
// opcode for registration, and that opcode is set in the routine that
//
// The final name registration in Broadcast is called an Overwrite request
// and it does not have the FL_RECURSION Desired bit set.
//
if (eNsType == eNAME_REGISTRATION_OVERWRITE)
{
pNameHdr->OpCodeFlags = (OP_REGISTRATION);
}
else
{
pNameHdr->OpCodeFlags = (FL_RECURDESIRE | OP_REGISTRATION);
}
pGeneral->Ttl = htonl(DEFAULT_TTL);
// *** NOTE: There is no BREAK here by DESIGN!!
case eNAME_RELEASE:
// this code sets the Broadcast bit based on the node type rather than the
// type of send....UdpSendNSBcast, resets the code according to the type of
// name, so this code may not need to set the Broadcast bit
//
if (eNsType == eNAME_RELEASE)
{
pNameHdr->OpCodeFlags = OP_RELEASE;
//
// TTL for release is zero
//
pGeneral->Ttl = 0;
}
pNameHdr->ArCount = 1; // 1 additional resource record included
//
// If WINS is on the same machine adjust the PDU to be able to tell
// WINS that this pdu came from the local machine
//
#ifndef VXD
if (pWinsInfo && (pTrackerRequest->Flags & NBT_NAME_SERVER))
{
pNameHdr->AnCount = (UCHAR)WINS_SIGNATURE;
}
#endif
pGeneral->RrName.uSizeLabel = PTR_TO_NAME; // set top two bits to signify ptr
// the offset ptr to the name added above
pGeneral->RrName.pLabel[0] = sizeof(tNAMEHDR) - sizeof(tNETBIOS_NAME);
pGeneral->RrTypeClass = htonl(QUEST_NBINTERNET);
pGeneral->Length = htons(6);
pGeneral->Flags = htons((USHORT)((NameType << 15) | NbtConfig.PduNodeType));
pGeneral->IpAddress = htonl(IpAddress);
break;
}
// return the ptr to the IP address so this can be filled in later if necessary
return((PVOID)&pGeneral->IpAddress);
}
//----------------------------------------------------------------------------
VOID
NameDgramSendCompleted(
PVOID pContext,
NTSTATUS status,
ULONG lInfo
)
/*++
Routine Description:
This routine frees the name service datagram that was allocated for
this name query or name registration in UdpSendNsBcast.
Arguments:
pContext = ptr to datagram header
Return Value:
--*/
{
tDGRAM_SEND_TRACKING *pTracker;
CTELockHandle OldIrq;
pTracker = (tDGRAM_SEND_TRACKING *)pContext;
CTESpinLock(&NbtConfig.JointLock,OldIrq);
CTEMemFree(pTracker->SendBuffer.pDgramHdr);
pTracker->SendBuffer.pDgramHdr = NULL;
NBT_DEREFERENCE_TRACKER(pTracker, TRUE);
CTESpinFree(&NbtConfig.JointLock,OldIrq);
}
//----------------------------------------------------------------------------
VOID
NDgramSendCompleted(
PVOID pContext,
NTSTATUS status,
ULONG lInfo
)
/*++
Routine Description:
This routine frees the name service datagram that was allocated for
this name query or name registration in UdpSendNsBcast.
Arguments:
pContext = ptr to datagram header
Return Value:
--*/
{
tDGRAM_SEND_TRACKING *pTracker;
CTELockHandle OldIrq;
pTracker = (tDGRAM_SEND_TRACKING *)pContext;
FreeTracker(pTracker, FREE_HDR | RELINK_TRACKER);
}
//----------------------------------------------------------------------------
NTSTATUS
UdpSendResponse(
IN ULONG lNameSize,
IN tNAMEHDR UNALIGNED *pNameHdrIn,
IN tNAMEADDR *pNameAddr,
IN PTDI_ADDRESS_IP pDestIpAddress,
IN tDEVICECONTEXT *pDeviceContext,
IN ULONG Rcode,
IN enum eNSTYPE NsType,
IN CTELockHandle OldIrq
)
/*++
Routine Description:
This routine builds a Name Release/Registration/Query response pdu and
sends it with the specified Rcode.
Arguments:
lSize - number of bytes in the name including scope in half ascii
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
tNAMEHDR *pNameHdr;
ULONG uLength;
tDGRAM_SEND_TRACKING *pTracker;
tQUERYRESP UNALIGNED *pQuery;
ULONG ToCopy;
LONG i;
BOOLEAN RespondWithOneAddr = TRUE;
ULONG MultiHomedSize = 0;
ULONG in_addr;
USHORT in_port;
ULONG IpAddress = 0;
USHORT NameType = 0; // Assume we are Unique by default!
BOOLEAN DoNonProxyCode = TRUE;
in_addr = ntohl(pDestIpAddress->in_addr);
in_port = ntohs(pDestIpAddress->sin_port);
// a multihomed node can have the SingleResponse registry value set so
// that it never returns a list of ip addresses. This allows multihoming
// in disjoint WINS server domains. - for name Query responses only
//
if ((NbtConfig.MultiHomed) && (!pNameAddr || pNameAddr->Verify != REMOTE_NAME) &&
(!NbtConfig.SingleResponse) &&
(NsType == eNAME_QUERY_RESPONSE))
{
// if (SrcIsNameServer(in_addr,in_port))
{
RespondWithOneAddr = FALSE;
MultiHomedSize = (NbtConfig.AdapterCount-1)*sizeof(tADDSTRUCT);
}
}
// size is size of the namehdr structure -1 for NetBiosName[1]
// + the 32 bytes for the half ascii name + the Query response record
// + any scope size (including the null on the end of the name)
// ( part of the lNameSize) + the number of extra adapters * the size
// of the address structure (multihomed case).
uLength = sizeof(tNAMEHDR)
+ sizeof(tQUERYRESP)
+ lNameSize
- 1
+ MultiHomedSize;
// Note that this memory must be deallocated when the send completes in
// tdiout.DgramSendCompletion
pNameHdr = NbtAllocMem((USHORT)uLength ,NBT_TAG('Y'));
if (!pNameHdr)
{
CTESpinFree(&NbtConfig.JointLock,OldIrq);
return(STATUS_INSUFFICIENT_RESOURCES);
}
CTEZeroMemory((PVOID)pNameHdr,uLength);
pNameHdr->QdCount = 0;
pNameHdr->AnCount = 1;
//
// fill in the rest of the PDU explicitly
//
pQuery = (tQUERYRESP *)&pNameHdr->NameRR.NetBiosName[lNameSize];
pQuery->RrTypeClass = htonl(QUEST_NBINTERNET);
pQuery->Ttl = 0;
pQuery->Length = htons(sizeof(tADDSTRUCT));
pQuery->Flags = htons((USHORT)(NbtConfig.PduNodeType));
// set the name type to 1 if it is a group so we can shift the 1 to the 16th
// bit position
// pNameAddr may not be set if we are sending a -ve NameQuery response, in which case, the field
// is never looked at, or if we are sending a release response, which holds sends only
// for a unique name, in which case we have already initialized the value to 0
//
if (pNameAddr != NULL)
{
NameType = (pNameAddr->NameTypeState & (NAMETYPE_GROUP | NAMETYPE_INET_GROUP)) ? 1 : 0;
}
pQuery->Flags = htons((USHORT)((NameType << 15) | NbtConfig.PduNodeType));
// convert Rcode to network order
Rcode = htons(Rcode);
switch (NsType)
{
case eNAME_RELEASE:
case eNAME_REGISTRATION_RESPONSE:
// copy the source name and the 12 bytes preceeding it to complete the
// response pdu
//
ToCopy = sizeof(tNAMEHDR) + lNameSize -1;
CTEMemCopy((PVOID)pNameHdr,
(PVOID)pNameHdrIn,
ToCopy);
if (NsType == eNAME_RELEASE)
{
// setup the fields in the response.
pNameHdr->OpCodeFlags = (USHORT)(OP_RESPONSE | OP_RELEASE
| FL_AUTHORITY
| Rcode);
}
else
{
// setup the fields in the response.
pNameHdr->OpCodeFlags = (USHORT)(OP_RESPONSE | OP_REGISTRATION |
FL_RECURDESIRE | FL_RECURAVAIL | FL_AUTHORITY
| Rcode);
}
// these two lines must be here because the memcopy above sets
// them to wrong values.
pNameHdr->QdCount = 0;
pNameHdr->AnCount = 1;
pNameHdr->ArCount = 0;
pNameHdr->NsCount = 0;
// this code will run in the proxy case where another node does a
// registration of a unique name that conflicts with an internet
// group name in the remote table. There are never any internet group
// names in the local table - at least if there are, they are flagged
// as simple groups.
//
if (pNameAddr)
{
if (pNameAddr->NameTypeState & NAMETYPE_INET_GROUP)
{
if (pNameAddr->pLmhSvcGroupList)
{
IpAddress = pNameAddr->pLmhSvcGroupList[0];
}
else
{
IpAddress = 0;
}
}
else
{
// an ipaddress of 0 and a group name means it is a local name
// table entry, where the 0 ipaddress should be switched to the
// ipaddress of this adapter.
//
if ((pNameAddr->IpAddress == 0) &&
(pNameAddr->NameTypeState & NAMETYPE_GROUP))
{
IpAddress = pDeviceContext->IpAddress;
}
else
{
IpAddress = pNameAddr->IpAddress;
}
}
}
else
{
IpAddress = 0;
}
break;
case eNAME_QUERY_RESPONSE:
pNameHdr->OpCodeFlags = ( OP_RESPONSE | FL_AUTHORITY | FL_RECURDESIRE );
pNameHdr->TransactId = pNameHdrIn->TransactId;
// add 1 for the name length byte on the front of the name - scope is already
// included in lNameSize
//
CTEMemCopy(&pNameHdr->NameRR.NameLength, (PVOID)&pNameHdrIn->NameRR.NameLength, lNameSize+1);
if (pNameAddr == NULL)
{
// this is a negative query response record since there is no
// local name to be found
//
pNameHdr->OpCodeFlags |= htons(NAME_ERROR);
pQuery->Length = 0;
IpAddress = 0;
}
else
{
tDEVICECONTEXT *pDevContext;
PLIST_ENTRY pHead;
PLIST_ENTRY pEntry;
// do not send name query responses for names not registered on
// this net card, unless it is the name server for that net
// card requesting the name query, since for Multihomed nodes
// when it registers a name, WINS will do a query, which may
// come in on the other net card that the name is not active on
// yet - so we want to respond to this sort of query. Do not do
// this check for a proxy since it is responding for a name
// in the remote name table and it is not bound to an adapter.
//
if (!(NodeType & PROXY) &&
!(pNameAddr->AdapterMask & pDeviceContext->AdapterMask) &&
(!((in_port == NbtConfig.NameServerPort) &&
(pDeviceContext->lNameServerAddress == in_addr) ||
(pDeviceContext->lBackupServer == in_addr))))
{
//
// Only return an address to the requestor if the
// name is registered on that adapter
//
CTEMemFree(pNameHdr);
CTESpinFree(&NbtConfig.JointLock,OldIrq);
return(STATUS_UNSUCCESSFUL);
}
pQuery->Ttl = htonl(DEFAULT_TTL);
//
// In case of PROXY, we send one IP address as response to an
// internet group query. Note: there should not be any INET_GROUP
// names in the local hash table, hence a non-proxy should not execute
// this code
//
#ifdef PROXY_NODE
//
// When the proxy responds, the source node will see that it is a
// group name and convert it to a broadcast, so the Ip address doesn't
// really matter since the sender will not use it. Note that the
// source node send may not actually reach any members of the
// internet group since they may all be off the local subnet.
//
IF_PROXY(NodeType)
{
DoNonProxyCode = FALSE;
if (pNameAddr->NameTypeState & (NAMETYPE_INET_GROUP))
{
IpAddress = 0;
PickBestAddress (pNameAddr, pDeviceContext, &IpAddress);
}
else if (pNameAddr->Verify == LOCAL_NAME)
{
//
// if this name is local and if this is a multihomed machine
// we should treat it like a regular multihomed machine, even
// though this is a Proxy node
//
DoNonProxyCode = TRUE;
}
else
{
IpAddress = pNameAddr->IpAddress;
}
if (IpAddress == 0)
{
// don't return 0, return the broadcast address
//
IpAddress = pDeviceContext->BroadcastAddress;
}
}
if (DoNonProxyCode)
#endif
{
// the node could be multihomed, but we are saying, only
// respond with one address when this flag is set.
if (RespondWithOneAddr)
{
// for multihomed hosts, SelectAdapter can be set to TRUE
//
if (NbtConfig.SelectAdapter)
{
CTESystemTime TimeValue;
LONG Index;
ULONG Count=0;
// we are only going to return one address, but we
// can randomly select it from the available adapters
// Try to find a valid ip address 5 times.
//
IpAddress = 0;
while ((IpAddress == 0) && (Count < 5))
{
Count++;
CTEQuerySystemTime(TimeValue);
Index = RandomizeFromTime( TimeValue, NbtConfig.AdapterCount ) ;
pHead = &NbtConfig.DeviceContexts;
pEntry = pHead->Flink;
for (i = 0;i< Index;i++)
pEntry = pEntry->Flink;
pDevContext = CONTAINING_RECORD(pEntry,tDEVICECONTEXT,Linkage);
IpAddress = pDevContext->IpAddress;
}
//
// if this adapter still has a null IpAddress then respond
// with the adapter the request came in on, since the
// other adapters could be idle RAS or waiting for a DHCP
// address just now...
//
if (IpAddress == 0)
{
IpAddress = pDeviceContext->IpAddress;
}
}
else
{
IpAddress = pDeviceContext->IpAddress;
}
}
else
{
tADDSTRUCT *pAddStruct;
USHORT Flags;
ULONG Count = 0;
// multihomed case - go through all the adapters making
// up a structure of all adapters that the name is
// registered against. Enough memory was allocated up
// front to have the name registered against all adapeters
// on this node.
//
Flags = pQuery->Flags;
// set to zero so we don't try to set pQuery->IpAddress
// below
IpAddress = 0;
pAddStruct = (tADDSTRUCT *)&pQuery->Flags;
pHead = &NbtConfig.DeviceContexts;
pEntry = pHead->Flink;
while (pEntry != pHead)
{
pDevContext = CONTAINING_RECORD(pEntry,tDEVICECONTEXT,Linkage);
//
// only pass back addresses registered on this adapter
// that are not null(i.e. not RAS adapters after a disconnect)
//
if ((pDevContext->AdapterMask & pNameAddr->AdapterMask) &&
(pDevContext->IpAddress))
{
pAddStruct->NbFlags = Flags;
pAddStruct->IpAddr = htonl(pDevContext->IpAddress);
Count++;
pAddStruct++;
}
pEntry = pEntry->Flink;
}
// re-adjust the length of the pdu if the name is not registered
// against all adapters...
//
if (Count != NbtConfig.AdapterCount)
{
uLength -= (NbtConfig.AdapterCount - Count)*sizeof(tADDSTRUCT);
}
pQuery->Length = (USHORT)htons(Count*sizeof(tADDSTRUCT));
}
}
}
}
if (IpAddress)
{
pQuery->IpAddress = htonl(IpAddress);
}
// get a tracker structure, which has a SendInfo structure in it
status = GetTracker(&pTracker, NBT_TRACKER_SEND_RESPONSE_DGRAM);
if (!NT_SUCCESS(status))
{
CTEMemFree((PVOID)pNameHdr);
CTESpinFree(&NbtConfig.JointLock,OldIrq);
return(STATUS_INSUFFICIENT_RESOURCES);
}
// fill in the connection information
pTracker->SendBuffer.HdrLength = uLength;
pTracker->SendBuffer.pDgramHdr = (PVOID)pNameHdr;
pTracker->SendBuffer.Length = 0;
pTracker->SendBuffer.pBuffer = NULL;
pTracker->pDeviceContext = pDeviceContext;
CTESpinFree(&NbtConfig.JointLock,OldIrq);
status = UdpSendDatagram (pTracker,
in_addr,
QueryRespDone,
pTracker,
in_port,
NBT_NAME_SERVICE);
return(status);
}
//----------------------------------------------------------------------------
VOID
QueryRespDone(
IN PVOID pContext,
IN NTSTATUS status,
IN ULONG lInfo)
/*++
Routine Description
This routine handles cleaning up various data blocks used in conjunction
with the sending the Query response.
Arguments:
pContext - ptr to the DGRAM_TRACKER block
NTSTATUS - completion status
Return Values:
VOID
--*/
{
tDGRAM_SEND_TRACKING *pTracker;
CTELockHandle OldIrq;
pTracker = (tDGRAM_SEND_TRACKING *)pContext;
FreeTracker(pTracker,RELINK_TRACKER | FREE_HDR);
}
//----------------------------------------------------------------------------
NTSTATUS
UdpSendDatagram(
IN tDGRAM_SEND_TRACKING *pDgramTracker,
IN ULONG IpAddress,
IN PVOID pCompletionRoutine,
IN PVOID CompletionContext,
IN USHORT Port,
IN ULONG Service
)
/*++
Routine Description:
This routine sends a datagram across the TDI to be sent by Udp.
Arguments:
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
TDI_REQUEST TdiRequest;
ULONG uSentSize;
TDI_CONNECTION_INFORMATION *pSendInfo;
PTRANSPORT_ADDRESS pTransportAddr;
ULONG Length;
PFILE_OBJECT TransportFileObject = NULL;
CTELockHandle OldIrq;
tDEVICECONTEXT *pDeviceContext = NULL;
tFILE_OBJECTS *pFileObjectsContext;
status = STATUS_SUCCESS;
CTESpinLock(&NbtConfig.JointLock,OldIrq);
if (NBT_REFERENCE_DEVICE (pDgramTracker->pDeviceContext, REF_DEV_UDP_SEND, TRUE))
{
pDeviceContext = pDgramTracker->pDeviceContext; // Assigned => referenced!
if ((pDgramTracker->pDeviceContext->IpAddress) &&
(pFileObjectsContext = pDgramTracker->pDeviceContext->pFileObjects))
{
switch (Service)
{
case (NBT_NAME_SERVICE):
TransportFileObject = pDgramTracker->pDeviceContext->pFileObjects->pNameServerFileObject;
break;
case (NBT_DATAGRAM_SERVICE):
TransportFileObject = pDgramTracker->pDeviceContext->pFileObjects->pDgramFileObject;
break;
default:
;
}
//
// an address of 0 means do a broadcast. When '1C' internet group
// names are built either from the Lmhost file or from the network
// the broadcast address is inserted in the list as 0.
//
if (IpAddress == 0)
{
IpAddress = pDgramTracker->pDeviceContext->BroadcastAddress;
}
// when there is no WINS server set in the registry we set the WINS
// ip address to LOOP_BACK, so if it is set to that here, do not send
// the datagram. If There is no Ip Address then the Transport Handle
// will be null and we do not do the send in that case either.
//
if (IpAddress == LOOP_BACK)
{
TransportFileObject = NULL ;
}
}
//
// Dereference the Device if the request is going to fail, or
// there is no completion routine!
//
if ((!TransportFileObject) || (!pCompletionRoutine))
{
NBT_DEREFERENCE_DEVICE (pDeviceContext, REF_DEV_UDP_SEND, TRUE);
}
}
if (!TransportFileObject)
{
CTESpinFree(&NbtConfig.JointLock,OldIrq);
if (pCompletionRoutine)
{
(*(NBT_COMPLETION) pCompletionRoutine) (CompletionContext, STATUS_UNSUCCESSFUL, 0);
}
return(status);
}
pFileObjectsContext->RefCount++; // Dereferenced after the Send has completed
CTESpinFree(&NbtConfig.JointLock,OldIrq);
// the completion routine is setup to free the pDgramTracker memory block
TdiRequest.Handle.AddressHandle = (PVOID)TransportFileObject;
TdiRequest.RequestNotifyObject = pCompletionRoutine;
TdiRequest.RequestContext = (PVOID)CompletionContext;
// the send length is the client dgram length + the size of the dgram header
Length = pDgramTracker->SendBuffer.HdrLength + pDgramTracker->SendBuffer.Length;
// fill in the connection information
pSendInfo = pDgramTracker->pSendInfo;
pSendInfo->RemoteAddressLength = sizeof(TRANSPORT_ADDRESS) -1 + pNbtGlobConfig->SizeTransportAddress;
// fill in the remote address
pTransportAddr = (PTRANSPORT_ADDRESS)pSendInfo->RemoteAddress;
pTransportAddr->TAAddressCount = 1;
pTransportAddr->Address[0].AddressLength = pNbtGlobConfig->SizeTransportAddress;
pTransportAddr->Address[0].AddressType = TDI_ADDRESS_TYPE_IP;
((PTDI_ADDRESS_IP)pTransportAddr->Address[0].Address)->sin_port = htons(Port);
((PTDI_ADDRESS_IP)pTransportAddr->Address[0].Address)->in_addr = htonl(IpAddress);
status = TdiSendDatagram (&TdiRequest, pSendInfo, Length, &uSentSize, pDgramTracker);
CTESpinLock(&NbtConfig.JointLock,OldIrq);
if (--pFileObjectsContext->RefCount == 0)
{
NTQueueToWorkerThread(
&pFileObjectsContext->WorkItemCleanUp,
DelayedNbtCloseFileHandles,
NULL,
pFileObjectsContext,
NULL,
NULL,
TRUE
);
}
CTESpinFree(&NbtConfig.JointLock,OldIrq);
return(status);
}
//----------------------------------------------------------------------------
NTSTATUS
TcpSessionStart(
IN tDGRAM_SEND_TRACKING *pTracker,
IN ULONG IpAddress,
IN tDEVICECONTEXT *pDeviceContext,
IN PVOID pCompletionRoutine,
IN ULONG Port
)
/*++
Routine Description:
This routine sets up a tcp connection by passing a connect through TDI to
TCP.
Arguments:
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
TDI_REQUEST TdiRequest;
TDI_CONNECTION_INFORMATION *pSendInfo;
PTRANSPORT_ADDRESS pTransportAddr;
tCONNECTELE *pConnEle;
CTELockHandle OldIrq;
tLOWERCONNECTION *pLowerConn;
pSendInfo = pTracker->pSendInfo;
// we need to pass the file handle of the connection to TCP.
pConnEle = (tCONNECTELE *)pTracker->pConnEle;
CTESpinLock(pConnEle,OldIrq);
pLowerConn = pConnEle->pLowerConnId;
if (pLowerConn)
{
TdiRequest.Handle.AddressHandle = (PVOID)((tLOWERCONNECTION *)pConnEle->pLowerConnId)->pFileObject;
// the completion routine is setup to free the pTracker memory block
TdiRequest.RequestNotifyObject = pCompletionRoutine;
TdiRequest.RequestContext = (PVOID)pTracker;
// fill in the connection information
pSendInfo->RemoteAddressLength = sizeof(TRANSPORT_ADDRESS) -1 + pNbtGlobConfig->SizeTransportAddress;
pTransportAddr = (PTRANSPORT_ADDRESS)pSendInfo->RemoteAddress;
// fill in the remote address
pTransportAddr->TAAddressCount = 1;
pTransportAddr->Address[0].AddressLength = pNbtGlobConfig->SizeTransportAddress;
pTransportAddr->Address[0].AddressType = TDI_ADDRESS_TYPE_IP;
((PTDI_ADDRESS_IP)pTransportAddr->Address[0].Address)->sin_port = htons((USHORT)Port);
((PTDI_ADDRESS_IP)pTransportAddr->Address[0].Address)->in_addr = htonl(IpAddress);
CTESpinFree(pConnEle,OldIrq);
// pass through the TDI I/F on the bottom of NBT, to the transport
// pass in the original irp from the client so that the client can
// cancel it ok...rather than use one of NBT's irps
//
status = TdiConnect (&TdiRequest, (ULONG_PTR)pTracker->pTimeout, pSendInfo, pConnEle->pIrp);
}
else
{
CTESpinFree(pConnEle,OldIrq);
//
// Complete the request through the completion routine so it
// cleans up correctly
//
(*(NBT_COMPLETION)pCompletionRoutine)( (PVOID)pTracker, STATUS_CANCELLED, 0L );
status = STATUS_CANCELLED;
}
NbtTrace(NBT_TRACE_OUTBOUND, ("\tpTracker %p: %!status!", pTracker, status));
return(status);
}
//----------------------------------------------------------------------------
NTSTATUS
TcpSendSessionResponse(
IN tLOWERCONNECTION *pLowerConn,
IN ULONG lStatusCode,
IN ULONG lSessionStatus
)
/*++
Routine Description:
This routine sends a session PDU corresponding to the lStatusCode. This
could be a KeepAlive, PositiveSessionResponse, NegativeSessionResponse or
a Retarget (not implemented yet). For the Keep Alive case the completion
routine passed in is used rather than SessionRespDone, as is the case
for all other messages.
Arguments:
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
tDGRAM_SEND_TRACKING *pTracker;
tSESSIONERROR *pSessionHdr;
pSessionHdr = (tSESSIONERROR *)NbtAllocMem(sizeof(tSESSIONERROR),NBT_TAG('Z'));
if (!pSessionHdr)
{
return(STATUS_INSUFFICIENT_RESOURCES);
}
// get a tracker structure, which has a SendInfo structure in it
status = GetTracker(&pTracker, NBT_TRACKER_SEND_RESPONSE_SESSION);
if (NT_SUCCESS(status))
{
pTracker->SendBuffer.pDgramHdr = (PVOID)pSessionHdr;
pTracker->SendBuffer.pBuffer = NULL;
pTracker->SendBuffer.Length = 0;
pSessionHdr->Flags = NBT_SESSION_FLAGS;
pSessionHdr->Type = (UCHAR)lStatusCode;
switch (lStatusCode)
{
case NBT_NEGATIVE_SESSION_RESPONSE:
pTracker->SendBuffer.HdrLength = sizeof(tSESSIONERROR);
// this length is one byte longer for the error code - different type used here
pSessionHdr->Length = htons(1); // one error code byte
pSessionHdr->ErrorCode = (UCHAR)lSessionStatus;
break;
case NBT_POSITIVE_SESSION_RESPONSE:
pTracker->SendBuffer.HdrLength = sizeof(tSESSIONHDR);
pSessionHdr->Length = 0; // no data following the length byte
break;
}
NbtTrace(NBT_TRACE_INBOUND, ("pTracker %p: Session Response %d", pTracker, lStatusCode));
status = TcpSendSession(pTracker,
pLowerConn,
SessionRespDone);
}
else
{
CTEMemFree((PVOID)pSessionHdr);
}
return(status);
}
//----------------------------------------------------------------------------
NTSTATUS
TcpSendSession(
IN tDGRAM_SEND_TRACKING *pTracker,
IN tLOWERCONNECTION *pLowerConn,
IN PVOID pCompletionRoutine
)
/*++
Routine Description:
This routine sends a message on a tcp connection.
Arguments:
Return Value:
NTSTATUS - success or not
--*/
{
NTSTATUS status;
TDI_REQUEST TdiRequest;
ULONG lSentLength;
// we need to pass the file handle of the connection to TCP.
TdiRequest.Handle.AddressHandle = (PVOID)pLowerConn->pFileObject;
// the completion routine is setup to free the pTracker memory block
TdiRequest.RequestContext = (PVOID)pTracker;
// this completion routine just puts the tracker back on its list and
// frees the memory associated with the UserData buffer.
TdiRequest.RequestNotifyObject = pCompletionRoutine;
// pass through the TDI I/F on the bottom of NBT, to the transport
status = TdiSend(
&TdiRequest,
0, // no send flags
(ULONG)pTracker->SendBuffer.HdrLength +
(ULONG)pTracker->SendBuffer.Length ,
&lSentLength,
&pTracker->SendBuffer,
0); // no send flags set
NbtTrace(NBT_TRACE_OUTBOUND, ("\tpTracker %p: %!status!", pTracker, status));
return(status);
}
//----------------------------------------------------------------------------
VOID
SessionRespDone(
IN PVOID pContext,
IN NTSTATUS status,
IN ULONG lInfo)
/*++
Routine Description
This routine handles cleaning up various data blocks used in conjunction
sending a session response at session startup time. If the session
response was negative, then kill the connection.
Arguments:
pContext - ptr to the DGRAM_TRACKER block
NTSTATUS - completion status
Return Values:
VOID
--*/
{
tDGRAM_SEND_TRACKING *pTracker;
pTracker = (tDGRAM_SEND_TRACKING *)pContext;
FreeTracker(pTracker,FREE_HDR | RELINK_TRACKER);
}
//----------------------------------------------------------------------------
NTSTATUS
SendTcpDisconnect(
IN tLOWERCONNECTION *pLowerConnId
)
/*++
Routine Description
This routine disconnects a TCP connection in a graceful manner which
insures that any data still in the pipe gets to the other side. Mostly
it calls TcpDisconnect which does the work. This routine just gets a
tracker for the send.
Arguments:
pLowerConnID - ptr to the lower connection that has the file object in it
Return Values:
NTSTATUS - completion status
VOID
--*/
{
NTSTATUS status;
tDGRAM_SEND_TRACKING *pTracker;
status = GetTracker(&pTracker, NBT_TRACKER_SEND_DISCONNECT);
if (NT_SUCCESS(status))
{
pTracker->pConnEle = (PVOID)pLowerConnId;
status = TcpDisconnect(pTracker,NULL,TDI_DISCONNECT_RELEASE,FALSE);
}
return(status);
}
//----------------------------------------------------------------------------
NTSTATUS
TcpDisconnect(
IN tDGRAM_SEND_TRACKING *pTracker,
IN PVOID Timeout,
IN ULONG Flags,
IN BOOLEAN Wait
)
/*++
Routine Description
This routine disconnects a TCP connection in a graceful manner which
insures that any data still in the pipe gets to the other side.
Arguments:
pTracker - ptr to the DGRAM_TRACKER block
Return Values:
NTSTATUS - completion status
VOID
--*/
{
TDI_REQUEST TdiRequest;
NTSTATUS status;
// we need to pass the file handle of the connection to TCP.
TdiRequest.Handle.AddressHandle =
(PVOID)((tLOWERCONNECTION *)pTracker->pConnEle)->pFileObject;
// the completion routine is setup to free the pTracker memory block
TdiRequest.RequestContext = (PVOID)pTracker;
// this completion routine just puts the tracker back on its list and
// frees the memory associated with the UserData buffer.
TdiRequest.RequestNotifyObject = DisconnectDone;
pTracker->Flags = (USHORT)Flags;
status = TdiDisconnect(&TdiRequest,
Timeout,
Flags,
pTracker->pSendInfo,
((tLOWERCONNECTION *)pTracker->pConnEle)->pIrp,
Wait);
NbtTrace(NBT_TRACE_DISCONNECT, ("pTracker %p: %!status!", pTracker, status));
return(status);
}
//----------------------------------------------------------------------------
VOID
DisconnectDone(
IN PVOID pContext,
IN NTSTATUS status,
IN ULONG lInfo)
/*++
Routine Description
This routine handles cleaning up after a disconnect is sent to the transport.
Arguments:
pContext - ptr to the DGRAM_TRACKER block
Return Values:
VOID
--*/
{
tDGRAM_SEND_TRACKING *pTracker;
tLOWERCONNECTION *pLowerConn;
CTELockHandle OldIrq;
PCTE_IRP pIrp;
BOOLEAN CleanupLower = FALSE;
NTSTATUS DiscWaitStatus;
tCONNECTELE *pConnEle;
PCTE_IRP pIrpClose;
tDEVICECONTEXT *pDeviceContext = NULL;
pTracker = (tDGRAM_SEND_TRACKING *)pContext;
pLowerConn = (tLOWERCONNECTION *)pTracker->pConnEle;
NbtTrace(NBT_TRACE_DISCONNECT, ("pTracker %p: pLowerConn %p pConnEle %p %!status!",
pTracker, pLowerConn, pLowerConn->pUpperConnection, status));
CTESpinLock(&NbtConfig.JointLock,OldIrq);
CTESpinLockAtDpc(pLowerConn);
ASSERT (NBT_VERIFY_HANDLE (pLowerConn, NBT_VERIFY_LOWERCONN));
IF_DBG(NBT_DEBUG_DISCONNECT)
KdPrint(("Nbt.DisconnectDone: Disconnect Irp has been returned...pLowerConn %X,state %X\n",
pLowerConn,pLowerConn->State));
//
// if the state is disconnected, then a disconnect indication
// has come from the transport.. . if still disconnecting,
// then we have not had a disconnect indication yet, so
// wait for the indication to go through DisconnectHndlrNotOs which
// will do the cleanup.
//
// Streams TCP always indicates before completing the disconnect request,
// so we always cleanup here for the Streams stack.
//
//
// If the disconnect was abortive, then there will not be a disconnect
// indication, so do the cleanup now.
//
if ((!StreamsStack) &&
(NT_SUCCESS (status)) &&
(pTracker->Flags == TDI_DISCONNECT_RELEASE) &&
(pLowerConn->State == NBT_DISCONNECTING))
{
SET_STATE_LOWER (pLowerConn, NBT_DISCONNECTED);
}
else if (pLowerConn->State != NBT_IDLE)
{
//
// change the state to idle so that the Disconnect handler will
// not attempt to do anything with it if for some reason the transport
// indicates a disconnect after this point.
//
ASSERT((pLowerConn->State == NBT_DISCONNECTED) || (pLowerConn->State == NBT_DISCONNECTING));
SET_STATE_LOWER (pLowerConn, NBT_IDLE);
CleanupLower = TRUE;
}
//
// there may be a disconnect wait irp, so return that first if there
// is one waiting around.
//
pConnEle = pLowerConn->pUpperConnection;
if (pConnEle && pConnEle->pIrpClose)
{
pIrpClose = pConnEle->pIrpClose;
CHECK_PTR(pConnEle);
pConnEle->pIrpClose = NULL ;
if (pConnEle->DiscFlag == TDI_DISCONNECT_ABORT)
{
DiscWaitStatus = STATUS_CONNECTION_RESET;
}
else
{
DiscWaitStatus = STATUS_GRACEFUL_DISCONNECT;
}
}
else
{
pIrpClose = NULL;
}
//
// This is the disconnect requesting Irp
//
pLowerConn->bDisconnectIrpPendingInTCP = FALSE;
if (pLowerConn->pIrp)
{
pIrp = pLowerConn->pIrp;
pLowerConn->pIrp = NULL ;
}
else
{
pIrp = NULL;
}
CTESpinFreeAtDpc(pLowerConn);
if (CleanupLower)
{
ASSERT(pLowerConn->RefCount > 1);
if (NBT_VERIFY_HANDLE (pLowerConn->pDeviceContext, NBT_VERIFY_DEVCONTEXT))
{
pDeviceContext = pLowerConn->pDeviceContext;
}
// this either puts the lower connection back on its free
// queue if inbound, or closes the connection with the transport
// if out bound. (it can't be done at dispatch level).
//
status = NTQueueToWorkerThread(
&pLowerConn->WorkItemCleanUpAndWipeOut,
DelayedCleanupAfterDisconnect,
NULL,
pLowerConn,
NULL,
pDeviceContext,
TRUE
);
}
CTESpinFree(&NbtConfig.JointLock,OldIrq);
FreeTracker(pTracker,RELINK_TRACKER);
if (pIrpClose)
{
CTEIoComplete( pIrpClose, DiscWaitStatus, 0 ) ;
}
if (pIrp)
{
CTEIoComplete( pIrp, status, 0 ) ;
}
}
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