384 lines
13 KiB
C
384 lines
13 KiB
C
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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bowtdi.c
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Abstract:
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This module implements all of the routines that interface with the TDI
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transport for NT
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Author:
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Larry Osterman (LarryO) 21-Jun-1990
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Revision History:
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21-Jun-1990 LarryO
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Created
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--*/
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#include "precomp.h"
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#include <isnkrnl.h>
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#include <smbipx.h>
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#pragma hdrstop
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NTSTATUS
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BowserHandleIpxDomainAnnouncement(
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IN PTRANSPORT Transport,
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IN PSMB_IPX_NAME_PACKET NamePacket,
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IN PBROWSE_ANNOUNCE_PACKET_1 DomainAnnouncement,
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IN DWORD RequestLength,
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IN ULONG ReceiveFlags
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE4BROW, BowserHandleIpxDomainAnnouncement)
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#endif
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NTSTATUS
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BowserIpxDatagramHandler (
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IN PVOID TdiEventContext,
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IN LONG SourceAddressLength,
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IN PVOID SourceAddress,
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IN LONG OptionsLength,
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IN PVOID Options,
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IN ULONG ReceiveDatagramFlags,
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IN ULONG BytesIndicated,
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IN ULONG BytesAvailable,
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OUT ULONG *BytesTaken,
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IN PVOID Tsdu,
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OUT PIRP *IoRequestPacket
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)
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{
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PVOID DatagramData;
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PINTERNAL_TRANSACTION InternalTransaction = NULL;
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ULONG DatagramDataSize;
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PTRANSPORT Transport = TdiEventContext;
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MAILSLOTTYPE Opcode;
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PSMB_IPX_NAME_PACKET NamePacket = Tsdu;
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PSMB_HEADER Smb = (PSMB_HEADER)(NamePacket+1);
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PCHAR ComputerName;
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PCHAR DomainName;
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PTRANSPORT_NAME TransportName = Transport->ComputerName;
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ULONG SmbLength = BytesIndicated - sizeof(SMB_IPX_NAME_PACKET);
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if (BytesAvailable > Transport->DatagramSize) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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if (BytesIndicated <= sizeof(SMB_IPX_NAME_PACKET)) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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//
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// If we're not fully initialized yet,
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// simply ignore the packet.
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//
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if (Transport->ComputerName == NULL ||
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Transport->PrimaryDomain == NULL ) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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ComputerName = ((PTA_NETBIOS_ADDRESS)(Transport->ComputerName->TransportAddress.Buffer))->Address[0].Address->NetbiosName;
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DomainName = ((PTA_NETBIOS_ADDRESS)(Transport->PrimaryDomain->TransportAddress.Buffer))->Address[0].Address->NetbiosName;
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//
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// It's not for us, ignore the announcement.
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//
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if (NamePacket->NameType == SMB_IPX_NAME_TYPE_MACHINE) {
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// Mailslot messages are always sent as TYPE_MACHINE even when they're
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// to the DomainName (so allow both).
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if (!RtlEqualMemory(ComputerName, NamePacket->Name, SMB_IPX_NAME_LENGTH) &&
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!RtlEqualMemory(DomainName, NamePacket->Name, SMB_IPX_NAME_LENGTH)) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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} else if (NamePacket->NameType == SMB_IPX_NAME_TYPE_WORKKGROUP) {
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if (!RtlEqualMemory(DomainName, NamePacket->Name, SMB_IPX_NAME_LENGTH)) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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} else if (NamePacket->NameType != SMB_IPX_NAME_TYPE_BROWSER) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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//
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// Classify the incoming packet according to it's type. Depending on
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// the type, either process it as:
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//
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// 1) A server announcement
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// 2) An incoming mailslot
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//
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Opcode = BowserClassifyIncomingDatagram(Smb, SmbLength,
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&DatagramData,
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&DatagramDataSize);
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if (Opcode == MailslotTransaction) {
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//
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// BowserHandleMailslotTransaction will always receive the indicated bytes
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// expecting to find the SMB. Tell the TDI driver we've already consumed
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// the IPX_NAME_PACKET to keep that assumption constant.
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//
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*BytesTaken = sizeof(SMB_IPX_NAME_PACKET);
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return BowserHandleMailslotTransaction(
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Transport->ComputerName,
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NamePacket->SourceName,
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sizeof(SMB_IPX_NAME_PACKET), // SMB offset into TSDU
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ReceiveDatagramFlags,
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BytesIndicated,
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BytesAvailable,
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BytesTaken,
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Tsdu,
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IoRequestPacket );
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} else if (Opcode == Illegal) {
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//
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// This might be illegal because it's a short packet. In that
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// case, handle it as if it were a short packet and deal with any
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// other failures when we have the whole packet.
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//
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if (BytesAvailable != BytesIndicated) {
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return BowserHandleShortBrowserPacket(Transport->ComputerName,
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TdiEventContext,
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SourceAddressLength,
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SourceAddress,
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OptionsLength,
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Options,
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ReceiveDatagramFlags,
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BytesAvailable,
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BytesTaken,
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IoRequestPacket,
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BowserIpxDatagramHandler
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);
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}
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BowserLogIllegalDatagram( Transport->ComputerName,
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Smb,
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(USHORT)(SmbLength & 0xffff),
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NamePacket->SourceName,
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ReceiveDatagramFlags);
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return STATUS_REQUEST_NOT_ACCEPTED;
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} else {
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PTA_NETBIOS_ADDRESS NetbiosAddress = SourceAddress;
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if (BowserDatagramHandlerTable[Opcode] == NULL) {
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return STATUS_SUCCESS;
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}
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//
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// If this isn't the full packet, post a receive for it and
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// handle it when we finally complete the receive.
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//
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if (BytesIndicated != BytesAvailable) {
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return BowserHandleShortBrowserPacket(Transport->ComputerName,
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TdiEventContext,
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SourceAddressLength,
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SourceAddress,
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OptionsLength,
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Options,
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ReceiveDatagramFlags,
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BytesAvailable,
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BytesTaken,
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IoRequestPacket,
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BowserIpxDatagramHandler
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);
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}
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InternalTransaction = DatagramData;
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//
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// If this is a workgroup announcement (a server announcement for another
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// workgroup), handle it specially - regardless of the opcode, it's
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// really a workgroup announcement.
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//
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if (NamePacket->NameType == SMB_IPX_NAME_TYPE_BROWSER) {
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if (Opcode == LocalMasterAnnouncement ) {
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NTSTATUS status;
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//
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// If we're processing these announcements, then handle this
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// as a domain announcement.
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//
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if (Transport->MasterBrowser &&
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Transport->MasterBrowser->ProcessHostAnnouncements) {
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status = BowserHandleIpxDomainAnnouncement(Transport,
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NamePacket,
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(PBROWSE_ANNOUNCE_PACKET_1)&InternalTransaction->Union.Announcement,
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SmbLength-((PCHAR)&InternalTransaction->Union.Announcement - (PCHAR)Smb),
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ReceiveDatagramFlags);
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} else {
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status = STATUS_REQUEST_NOT_ACCEPTED;
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}
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//
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// If this request isn't for our domain, we're done with it, if
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// it's for our domain, then we need to do some more work.
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//
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if (!RtlEqualMemory(DomainName, NamePacket->Name, SMB_IPX_NAME_LENGTH)) {
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return status;
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}
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} else {
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//
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// This isn't a master announcement, so ignore it.
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//
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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}
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//
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// Figure out which transportname is appropriate for the request:
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//
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// There are basically 3 choices:
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//
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// ComputeName (The default)
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// MasterBrowser (if this is a server announcement)
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// PrimaryDomain (if this is a request announcement)
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// Election (if this is a local master announcement)
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if ((Opcode == WkGroupAnnouncement) ||
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(Opcode == HostAnnouncement)) {
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if (Transport->MasterBrowser == NULL ||
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!Transport->MasterBrowser->ProcessHostAnnouncements) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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} else {
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TransportName = Transport->MasterBrowser;
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}
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} else if (Opcode == AnnouncementRequest) {
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TransportName = Transport->PrimaryDomain;
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} else if (Opcode == LocalMasterAnnouncement) {
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if (Transport->BrowserElection != NULL) {
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TransportName = Transport->BrowserElection;
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} else {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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}
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ASSERT (DatagramDataSize == (SmbLength - ((PCHAR)InternalTransaction - (PCHAR)Smb)));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.BrowseAnnouncement));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.RequestElection));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.BecomeBackup));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.GetBackupListRequest));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.GetBackupListResp));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.ResetState));
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ASSERT (FIELD_OFFSET(INTERNAL_TRANSACTION, Union.Announcement) == FIELD_OFFSET(INTERNAL_TRANSACTION, Union.MasterAnnouncement));
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return BowserDatagramHandlerTable[Opcode](TransportName,
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&InternalTransaction->Union.Announcement,
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SmbLength-((PCHAR)&InternalTransaction->Union.Announcement - (PCHAR)Smb),
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BytesTaken,
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SourceAddress,
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SourceAddressLength,
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&NamePacket->SourceName,
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SMB_IPX_NAME_LENGTH,
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ReceiveDatagramFlags);
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}
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return STATUS_SUCCESS;
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UNREFERENCED_PARAMETER(OptionsLength);
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UNREFERENCED_PARAMETER(Options);
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UNREFERENCED_PARAMETER(ReceiveDatagramFlags);
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}
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NTSTATUS
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BowserHandleIpxDomainAnnouncement(
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IN PTRANSPORT Transport,
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IN PSMB_IPX_NAME_PACKET NamePacket,
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IN PBROWSE_ANNOUNCE_PACKET_1 DomainAnnouncement,
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IN DWORD RequestLength,
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IN ULONG ReceiveFlags
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)
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/*++
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Routine Description:
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This routine will process receive datagram indication messages, and
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process them as appropriate.
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Arguments:
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IN PTRANSPORT Transport - The transport provider for this request.
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IN PSMB_IPX_NAME_PACKET NamePacket - The name packet for this request.
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Return Value:
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NTSTATUS - Status of operation.
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--*/
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{
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PVIEW_BUFFER ViewBuffer;
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DISCARDABLE_CODE(BowserDiscardableCodeSection);
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ExInterlockedAddLargeStatistic(&BowserStatistics.NumberOfDomainAnnouncements, 1);
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ViewBuffer = BowserAllocateViewBuffer();
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//
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// If we are unable to allocate a view buffer, ditch this datagram on
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// the floor.
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//
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if (ViewBuffer == NULL) {
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return STATUS_REQUEST_NOT_ACCEPTED;
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}
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BowserCopyOemComputerName(ViewBuffer->ServerName, NamePacket->Name, SMB_IPX_NAME_LENGTH, ReceiveFlags);
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BowserCopyOemComputerName(ViewBuffer->ServerComment, NamePacket->SourceName, SMB_IPX_NAME_LENGTH, ReceiveFlags);
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if ( DomainAnnouncement->Type & SV_TYPE_NT ) {
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ViewBuffer->ServerType = SV_TYPE_DOMAIN_ENUM | SV_TYPE_NT;
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} else {
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ViewBuffer->ServerType = SV_TYPE_DOMAIN_ENUM;
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}
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ASSERT (Transport->MasterBrowser != NULL);
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ViewBuffer->TransportName = Transport->MasterBrowser;
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ViewBuffer->ServerVersionMajor = DomainAnnouncement->VersionMajor;
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ViewBuffer->ServerVersionMinor = DomainAnnouncement->VersionMinor;
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ViewBuffer->ServerPeriodicity = (USHORT)((SmbGetUlong(&DomainAnnouncement->Periodicity) + 999) / 1000);
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BowserReferenceTransportName(Transport->MasterBrowser);
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BowserReferenceTransport( Transport );
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ExInitializeWorkItem(&ViewBuffer->Overlay.WorkHeader, BowserProcessDomainAnnouncement, ViewBuffer);
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ExQueueWorkItem(&ViewBuffer->Overlay.WorkHeader, DelayedWorkQueue);
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return STATUS_SUCCESS;
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}
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