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3206 lines
86 KiB
3206 lines
86 KiB
//============================================================================
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// Copyright (c) 1995, Microsoft Corporation
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//
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// File: scope.c
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//
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// History:
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// V Raman June-25-1997 Created.
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//
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// Functions that deal with addition/deletion of scope-boundary.
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//============================================================================
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#include "pchmgm.h"
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#pragma hdrstop
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//
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// prototypes for local functions
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//
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VOID
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ScopeIfAndInvokeCallbacks(
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PGROUP_ENTRY pge,
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PSOURCE_ENTRY pse,
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POUT_IF_ENTRY poie
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);
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VOID
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UnScopeIfAndInvokeCallbacks(
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PGROUP_ENTRY pge,
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PSOURCE_ENTRY pse,
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POUT_IF_ENTRY poie
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);
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PJOIN_ENTRY
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GetNextJoinEntry(
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);
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BOOL
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FindJoinEntry(
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PLIST_ENTRY pleJoinList,
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DWORD dwSourceAddr,
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DWORD dwSourceMask,
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DWORD dwGroupAddr,
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DWORD dwGroupMask,
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DWORD dwIfIndex,
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DWORD dwIfNextHopAddr,
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PJOIN_ENTRY * ppje
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);
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DWORD
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APIENTRY
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MgmBlockGroups(
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IN DWORD dwFirstGroup,
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IN DWORD dwLastGroup,
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IN DWORD dwIfIndex,
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IN DWORD dwIfNextHopAddr
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)
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/*++
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Routine Description :
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This function walks the Master group list and updates all group entries
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that fall in the range specified by dwFirstGroup-dwLastGroup. It ensures
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that the interface specified by dwifIndex is not present in the OIF list
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of any MFE for groups in that range. In addition any memberships for
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groups in the range on interface dwIfIndex are removed and added to the
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scoped interface list for the corresponding group. The scoped i/f list
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is maintained so that subsequent unblocking of a group is transparently
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handled by MGM. The interfaces present in the scoped i/f list for
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a group are automatically moved back to the OIF list when traffic for
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that group is unblocked.
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Arguements :
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dwFirstGroup - Lower end of the range to be blocked
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dwLastGroup - Upper end of the range to be blocked
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dwIfIndex - Interface on which traffic is to be blocked
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Return Value :
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NO_ERROR - Success
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Environment :
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This routine is invoked by the IP RouterManager in response to setting
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of a administrative scoped boundary on an interface.
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--*/
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{
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INT iCmp;
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DWORD dwIfBucket, dwTimeOut = 0;
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BOOL bFound, bDeleteCallback, bNewComp = FALSE;
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PIF_ENTRY pieIfEntry;
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PPROTOCOL_ENTRY ppe;
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PGROUP_ENTRY pge;
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PSOURCE_ENTRY pse;
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POUT_IF_ENTRY poie, poieTemp;
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PLIST_ENTRY pleGrpHead, pleGrp, pleSrcHead, pleSrc, ple;
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//
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// Verify that MGM is up and running and update thread-count
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//
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if ( !ENTER_MGM_API() )
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{
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return ERROR_CAN_NOT_COMPLETE;
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}
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TRACE3(
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SCOPE, "ENTERED MgmBlockGroups (%lx - %lx) on %lx",
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dwFirstGroup, dwLastGroup, dwIfIndex
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);
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do
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{
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ACQUIRE_PROTOCOL_LOCK_SHARED();
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//
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// Verify that interface specified by dwIfIndex exists
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//
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dwIfBucket = IF_TABLE_HASH( dwIfIndex );
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ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
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pieIfEntry = GetIfEntry(
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IF_BUCKET_HEAD( dwIfBucket ), dwIfIndex,
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dwIfNextHopAddr
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);
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if ( pieIfEntry == NULL )
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{
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TRACE1( SCOPE, "Interface %lx not found", dwIfIndex );
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break;
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}
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//
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// merge temp and master group lists
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//
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ACQUIRE_TEMP_GROUP_LOCK_EXCLUSIVE();
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MergeTempAndMasterGroupLists( TEMP_GROUP_LIST_HEAD() );
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RELEASE_TEMP_GROUP_LOCK_EXCLUSIVE();
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//
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// Lock master group list for reading
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//
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ACQUIRE_MASTER_GROUP_LOCK_SHARED();
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for ( pleGrpHead = MASTER_GROUP_LIST_HEAD(),
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pleGrp = pleGrpHead-> Flink;
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pleGrp != pleGrpHead;
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pleGrp = pleGrp-> Flink )
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{
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pge = CONTAINING_RECORD( pleGrp, GROUP_ENTRY, leGrpList );
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//
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// check if group is within range
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//
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if ( INET_CMP( pge-> dwGroupAddr, dwLastGroup, iCmp ) > 0 )
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{
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//
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// The master group list is ordered by group number and
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// the high end of the range to be blocked has been crossed.
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//
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break;
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}
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else if ( INET_CMP( pge-> dwGroupAddr, dwFirstGroup, iCmp ) < 0 )
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{
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//
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// Skip group entries smaller than the lower end of the range
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//
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continue;
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}
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//
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// Group Entry in range
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//
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//
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// lock the entry and merge the temp and master source lists
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//
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ACQUIRE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
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MergeTempAndMasterSourceLists( pge );
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//
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// Walk the Master source list.
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// For each source in the group
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//
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for ( pleSrcHead = MASTER_SOURCE_LIST_HEAD( pge ),
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pleSrc = pleSrcHead-> Flink;
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pleSrc != pleSrcHead;
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pleSrc = pleSrc-> Flink )
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{
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pse = CONTAINING_RECORD( pleSrc, SOURCE_ENTRY, leSrcList );
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//-----------------------------------------------------------
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// Part 1 : Membership updates.
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//-----------------------------------------------------------
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//
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// If there are any memberships for this group on this
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// interface, move them to the scoped interface list
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//
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bFound = FindOutInterfaceEntry(
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&pse-> leOutIfList, pieIfEntry-> dwIfIndex,
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pieIfEntry-> dwIfNextHopAddr,
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pieIfEntry-> dwOwningProtocol,
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pieIfEntry-> dwOwningComponent, &bNewComp, &poie
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);
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if ( bFound )
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{
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//
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// Move interface entry from OIF list to scoped list
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// and invoke deletion alerts are per interop rules.
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//
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ScopeIfAndInvokeCallbacks( pge, pse, poie );
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}
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//-------------------------------------------------------
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// Part 2 : MFE update.
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//-------------------------------------------------------
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bDeleteCallback = FALSE;
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//
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// Check if this source entry has an MFE.
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//
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if ( !IS_VALID_INTERFACE(
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pse-> dwInIfIndex, pse-> dwInIfNextHopAddr
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) )
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{
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//
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// This source entry is not an MFE. No further
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// processing required, Move to next source entry
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//
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continue;
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}
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//
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// This source entry is also an MFE
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//
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//
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// check if the boundary being added in on incoming
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// interface. If so create negative MFE, and issue
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// callbacks
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//
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if ( ( pse-> dwInIfIndex == pieIfEntry-> dwIfIndex ) &&
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( pse-> dwInIfNextHopAddr ==
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pieIfEntry-> dwIfNextHopAddr ) )
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{
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//
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// Interface on which this group is to blocked is the
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// incoming interface
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//
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//
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// Check if this is already a negative MFE. If so
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// nothing more to be done, move on to next source
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// entry
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//
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if ( IsListEmpty( &pse-> leMfeIfList ) )
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{
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continue;
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}
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//
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// Delete all the outgoing interfaces in the MFE OIF
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// list
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//
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while ( !IsListEmpty( &pse-> leMfeIfList ) )
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{
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ple = RemoveHeadList( &pse-> leMfeIfList ) ;
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poieTemp = CONTAINING_RECORD(
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ple, OUT_IF_ENTRY, leIfList
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);
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MGM_FREE( poieTemp );
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}
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pse-> dwMfeIfCount = 0;
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//
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// this MFE is now a negative MFE. Make sure to
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// invoke the deletion alert callback for the
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// protocol component that owns the incoming
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// interface
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//
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bDeleteCallback = TRUE;
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}
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else
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{
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//
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// Check if interface is present in the OIF of MFE.
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// If so remove interface from OIF and issue
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// callbacks as appropriate
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//
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bFound = FindOutInterfaceEntry(
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&pse-> leMfeIfList, pieIfEntry-> dwIfIndex,
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pieIfEntry-> dwIfNextHopAddr,
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pieIfEntry-> dwOwningProtocol,
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pieIfEntry-> dwOwningComponent, &bNewComp,
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&poie
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);
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if ( !bFound )
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{
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//
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// interface not present in the OIF list of MFE
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// move on to next entry
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//
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continue;
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}
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//
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// Delete the outgoing interface
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//
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DeleteOutInterfaceEntry( poie );
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pse-> dwMfeIfCount--;
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if ( !pse-> dwMfeIfCount )
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{
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//
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// MFE OIF list has no more outgoing interfaces.
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// Need to issue deletion alert to protocol component
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// owning incoming interface
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//
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bDeleteCallback = TRUE;
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}
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}
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//
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// If needed issue deletion alert to the protocol on the
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// incoming interface
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//
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if ( bDeleteCallback )
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{
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ppe = GetProtocolEntry(
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PROTOCOL_LIST_HEAD(), pse-> dwInProtocolId,
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pse-> dwInComponentId
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);
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if ( ppe == NULL )
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{
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//
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// Protocol owning incoming interface is not present
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// in incoming list. Very strange and should not happen.
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// Nothing to be done here, move on to next source.
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//
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TRACE3(
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SCOPE,
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"Protocol (%d, %d) not present for interface %d",
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pse-> dwInProtocolId, pse-> dwInComponentId,
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dwIfIndex
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);
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continue;
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}
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if ( IS_PRUNE_ALERT( ppe ) )
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{
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PRUNE_ALERT( ppe )(
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pse-> dwSourceAddr, pse-> dwSourceMask,
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pge-> dwGroupAddr, pge-> dwGroupMask,
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pse-> dwInIfIndex, pse-> dwInIfNextHopAddr,
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FALSE, &dwTimeOut
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);
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}
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}
|
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//
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// Update Kernel Mode forwarder
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//
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AddMfeToForwarder( pge, pse, dwTimeOut );
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}
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RELEASE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
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}
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RELEASE_MASTER_GROUP_LOCK_SHARED();
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} while ( FALSE );
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RELEASE_IF_LOCK_SHARED( dwIfBucket);
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//
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// Invoke pended Join/Prune alerts
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//
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InvokeOutstandingCallbacks();
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RELEASE_PROTOCOL_LOCK_SHARED();
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LEAVE_MGM_API();
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TRACE3(
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SCOPE, "LEAVING MgmBlockGroups (%lx - %lx) on %lx\n",
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dwFirstGroup, dwLastGroup, dwIfIndex
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);
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return NO_ERROR;
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}
|
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VOID
|
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ScopeIfAndInvokeCallbacks(
|
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PGROUP_ENTRY pge,
|
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PSOURCE_ENTRY pse,
|
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POUT_IF_ENTRY poie
|
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)
|
|
/*++
|
|
|
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Routine Description :
|
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This routine remove an interface entry from the outgoing interface
|
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list for the specified source entry and puts it into the scoped
|
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interface list. If the deletion of the interface to the OIF list
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requires deletion alert callbacks to be issued to protocol components
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these are issued by this routine.
|
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|
|
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Arguements :
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pge - Group entry correspondong to the group being blocked.
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pse - Source entry for the group being blocked
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poie - Interface entry corresponding to the interface over which
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the (source, group) entry is being blocked
|
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|
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Return Value :
|
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None
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Environment :
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Invoked from MgmBlockGroups. Assumes the protocol list and
|
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interface bucket are locked for read, and the group entry is
|
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locked for write.
|
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|
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--*/
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{
|
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BOOL bFound, bNewComp;
|
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|
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PPROTOCOL_ENTRY ppe;
|
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|
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POUT_IF_ENTRY poieTemp = NULL;
|
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|
|
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do
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{
|
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//
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// find the protocol component on the interface specified by poie
|
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//
|
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|
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ppe = GetProtocolEntry(
|
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PROTOCOL_LIST_HEAD(), poie-> dwProtocolId,
|
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poie-> dwComponentId
|
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);
|
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|
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if ( ppe == NULL )
|
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{
|
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//
|
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// Outgoing interface entry but corresponding owning
|
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// protocol is no present. This should not happen.
|
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// Print a warning indicating bad state and return
|
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//
|
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TRACE3(
|
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SCOPE, "Protocol (%d, %d) not present for interface %d",
|
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poie-> dwProtocolId, poie-> dwComponentId,
|
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poie-> dwIfIndex
|
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);
|
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|
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break;
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}
|
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|
|
|
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//
|
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// Remove interface entry from the OIF list
|
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//
|
|
|
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RemoveEntryList( &poie-> leIfList );
|
|
|
|
|
|
//
|
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// Find the locaion in the scoped i/f list and insert it
|
|
//
|
|
|
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bFound = FindOutInterfaceEntry(
|
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&pse-> leScopedIfList, poie-> dwIfIndex,
|
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poie-> dwIfNextHopAddr, poie-> dwProtocolId,
|
|
poie-> dwComponentId, &bNewComp, &poieTemp
|
|
);
|
|
|
|
if ( bFound )
|
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{
|
|
//
|
|
// Interface being scoped is already present in scoped
|
|
// i/f list. Strange. Print warning and quit.
|
|
//
|
|
|
|
TRACE4(
|
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ANY, "Interface (%d, %d) already present in the scoped list"
|
|
" for (%x, %x)", poie-> dwIfIndex, poie-> dwIfNextHopAddr,
|
|
pse-> dwSourceAddr, pge-> dwGroupAddr
|
|
);
|
|
|
|
MGM_FREE( poie );
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
InsertTailList(
|
|
( poieTemp == NULL ) ? &pse-> leScopedIfList :
|
|
&poieTemp-> leIfList,
|
|
&poie-> leIfList
|
|
);
|
|
|
|
|
|
//
|
|
// If group membership has been added by IGMP and this interface
|
|
// is owned by a different protocol, inform the protocol that IGMP
|
|
// has just left the interface. 'Hank you, 'hank you very much.
|
|
//
|
|
|
|
if ( IS_ADDED_BY_IGMP( poie ) && !IS_PROTOCOL_IGMP( ppe ) )
|
|
{
|
|
if ( IS_LOCAL_LEAVE_ALERT( ppe ) )
|
|
{
|
|
LOCAL_LEAVE_ALERT( ppe )(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
poie-> dwIfIndex, poie-> dwIfNextHopAddr
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Check if the removal of this interface from the OIF list
|
|
// resulted in decreasing the number of components present
|
|
// in the OIF list.
|
|
//
|
|
|
|
FindOutInterfaceEntry(
|
|
&pse-> leOutIfList, poie-> dwIfIndex, poie-> dwIfNextHopAddr,
|
|
poie-> dwProtocolId, poie-> dwComponentId, &bNewComp, &poieTemp
|
|
);
|
|
|
|
if ( bNewComp )
|
|
{
|
|
pse-> dwOutCompCount--;
|
|
|
|
//
|
|
// number of componets in OIF list has decreased.
|
|
// Invoke deletion alerts as per interop rules.
|
|
//
|
|
|
|
InvokePruneAlertCallbacks(
|
|
pge, pse, poie-> dwIfIndex, poie-> dwIfNextHopAddr, ppe
|
|
);
|
|
}
|
|
|
|
} while ( FALSE );
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
VOID
|
|
InvokePruneAlertCallbacks(
|
|
PGROUP_ENTRY pge,
|
|
PSOURCE_ENTRY pse,
|
|
DWORD dwIfIndex,
|
|
DWORD dwIfNextHopAddr,
|
|
PPROTOCOL_ENTRY ppe
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine invokes deletion alert callbacks of protocol components
|
|
in response to an interface being removed from the OIF list of a
|
|
source entry. Deletion alert callbacks are issued as per the
|
|
interop rules.
|
|
|
|
|
|
Arguements :
|
|
|
|
pge - Entry corresponding to group for which deletion alert callbacks
|
|
are being issued.
|
|
|
|
pse - Entry corresponding to source for which deletion alert callbacks
|
|
are being issued.
|
|
|
|
dwIfIndex - Index of interface that is being deleted (or scoped)
|
|
|
|
dwIfNextHopAddr - Next hop on interface that is being deleted (or scoped)
|
|
|
|
ppe - Protocol entry for the protocol component that owns the interface
|
|
corresponding to poie.
|
|
|
|
|
|
Return Value :
|
|
|
|
None
|
|
|
|
|
|
Environment :
|
|
|
|
Invoked from ScopeIfAndCanInvokeCallbacks and
|
|
DeleteInterfaceFromSourceEntry
|
|
|
|
--*/
|
|
{
|
|
PPROTOCOL_ENTRY ppeEntry;
|
|
|
|
POUT_IF_ENTRY poieTemp;
|
|
|
|
PLIST_ENTRY pleStart, pleProtocol;
|
|
|
|
|
|
//----------------------------------------------------------------
|
|
// Callback time
|
|
//----------------------------------------------------------------
|
|
|
|
//
|
|
// Check if Source specific join
|
|
//
|
|
|
|
if ( !IS_WILDCARD_SOURCE( pse-> dwSourceAddr, pse-> dwSourceMask ) )
|
|
{
|
|
if ( pse-> dwOutCompCount == 0 )
|
|
{
|
|
|
|
TRACESCOPE0( GROUP, "Last component in OIL for source specific" );
|
|
|
|
AddToOutstandingJoinList(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
dwIfIndex, dwIfNextHopAddr,
|
|
FALSE
|
|
);
|
|
}
|
|
}
|
|
|
|
else if ( pse-> dwOutCompCount == 1 )
|
|
{
|
|
TRACESCOPE0(
|
|
GROUP, "Number of components in the OIL is down to 1"
|
|
);
|
|
|
|
|
|
//
|
|
// Number of protocol components that have interfaces in the OIL
|
|
// has reduced from 2 to 1.
|
|
//
|
|
// invoke PRUNE_ALERT to the remaining protocol component
|
|
//
|
|
|
|
poieTemp = CONTAINING_RECORD(
|
|
pse-> leOutIfList.Flink, OUT_IF_ENTRY, leIfList
|
|
);
|
|
|
|
ppeEntry = GetProtocolEntry(
|
|
PROTOCOL_LIST_HEAD(), poieTemp-> dwProtocolId,
|
|
poieTemp-> dwComponentId
|
|
);
|
|
|
|
if ( ppeEntry == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokePruneAlertCallbacks : Could not"
|
|
" find protocol (%x, %x)", poieTemp-> dwProtocolId,
|
|
poieTemp-> dwComponentId
|
|
);
|
|
}
|
|
|
|
|
|
//
|
|
// invoke the delete membership callback for only the remaining
|
|
// interface.
|
|
//
|
|
|
|
else if ( IS_PRUNE_ALERT( ppeEntry ) )
|
|
{
|
|
PRUNE_ALERT( ppeEntry ) (
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
dwIfIndex, dwIfNextHopAddr, TRUE, NULL
|
|
);
|
|
}
|
|
}
|
|
|
|
else if ( pse-> dwOutCompCount == 0 )
|
|
{
|
|
TRACESCOPE0(
|
|
GROUP, "Number of components in the OIL is down to 0"
|
|
);
|
|
|
|
//
|
|
// Number of protocol components that have interfaces in the
|
|
// OIL has reduced from 1 to 0.
|
|
//
|
|
// invoke PRUNE_ALERT to all the other protocol
|
|
// components
|
|
//
|
|
|
|
for ( pleStart = PROTOCOL_LIST_HEAD(),
|
|
pleProtocol = pleStart-> Flink;
|
|
pleProtocol != pleStart;
|
|
pleProtocol = pleProtocol-> Flink )
|
|
{
|
|
ppeEntry = CONTAINING_RECORD(
|
|
pleProtocol, PROTOCOL_ENTRY, leProtocolList
|
|
);
|
|
|
|
if ( ( ppeEntry-> dwProtocolId == ppe-> dwProtocolId ) &&
|
|
( ppeEntry-> dwComponentId == ppe-> dwComponentId ) )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if ( IS_PRUNE_ALERT( ppeEntry ) )
|
|
{
|
|
PRUNE_ALERT( ppeEntry ) (
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
dwIfIndex, dwIfNextHopAddr, TRUE, NULL
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
DWORD
|
|
APIENTRY
|
|
MgmUnBlockGroups(
|
|
IN DWORD dwFirstGroup,
|
|
IN DWORD dwLastGroup,
|
|
IN DWORD dwIfIndex,
|
|
IN DWORD dwIfNextHopAddr
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This function walks the master group list and updates the memberships
|
|
of each group entry. If the interface (dwIfIndex) has previously been
|
|
removed from the outgoing list of the group entry (and placed in the
|
|
scoped i/f list) on account of a previous call to MgmBlockGroups
|
|
it is put back and all the MFEs for the group are
|
|
updated to reflect this addition.
|
|
|
|
In addition if this interface was the incoming interface for an MFE
|
|
update the timer to expire the MFE in short order (within a second).
|
|
This way we force the recreation of an MFE should there be traffic
|
|
for this group.
|
|
|
|
|
|
Arguements :
|
|
|
|
dwFirstGroup - Lower end of the range of groups to be unblocked
|
|
|
|
dwLastGroup - Upper end of the range of groups be be unblocked
|
|
|
|
dwIfIndex - Interface over which groups have to be unblocked.
|
|
|
|
|
|
Return Value :
|
|
|
|
NO_ERROR - Group range successfully unblocked
|
|
|
|
|
|
Environment :
|
|
|
|
This function is invoked by the IP RouterManager in response to
|
|
removal of a group boundary.
|
|
|
|
--*/
|
|
{
|
|
BOOL bNewComp = FALSE, bWCGrpLock = FALSE,
|
|
bUpdatePass = FALSE;
|
|
|
|
WORD wWCGroupAddedBy = 0, wWCGroupNumAddsByRP = 0,
|
|
wGroupAddedBy, wGroupNumAddsByRP, wGroupNumAddsByIGMP,
|
|
wSourceAddedBy, wSourceNumAddsByRP,
|
|
wSourceNumAddsByIGMP;
|
|
|
|
INT iCmp;
|
|
|
|
DWORD dwIfBucket, dwWCBucket, dwIfProtocol,
|
|
dwIfComponent, dwErr;
|
|
|
|
PIF_ENTRY pieIfEntry;
|
|
|
|
PGROUP_ENTRY pgeWC = NULL, pge;
|
|
|
|
PSOURCE_ENTRY pseWC = NULL, pse;
|
|
|
|
POUT_IF_ENTRY poie = NULL;
|
|
|
|
|
|
PLIST_ENTRY pleGrpHead, pleGrp, pleSrcHead, pleSrc;
|
|
LIST_ENTRY leForwardList;
|
|
|
|
|
|
//
|
|
// Ensure that MGM is running and increment count of threads
|
|
// exceuting in MGM
|
|
//
|
|
|
|
if ( !ENTER_MGM_API() )
|
|
{
|
|
return ERROR_CAN_NOT_COMPLETE;
|
|
}
|
|
|
|
TRACE3(
|
|
SCOPE, "ENTERED MgmUnblockGroups : (%lx - %lx) on %lx",
|
|
dwFirstGroup, dwLastGroup, dwIfIndex
|
|
);
|
|
|
|
|
|
ACQUIRE_PROTOCOL_LOCK_SHARED ();
|
|
|
|
InitializeListHead( &leForwardList );
|
|
|
|
do
|
|
{
|
|
//
|
|
// Pass I : aka Scan pass (bupdatePass == FALSE)
|
|
// Scan and Collect all MFEs for which CREATION_ALERTS need to
|
|
// invoked before updating the MFEs. Invoke the CREATION_ALERTS
|
|
// outside of any locks (which is why we need two passes).
|
|
//
|
|
// Pass II : Update pass (bupdatePass == TRUE)
|
|
// Update memberships and MFEs
|
|
//
|
|
|
|
//
|
|
// Verify dwIfIndex is a valid interface with MGM
|
|
//
|
|
|
|
dwIfBucket = IF_TABLE_HASH( dwIfIndex );
|
|
|
|
ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
|
|
|
|
pieIfEntry = GetIfEntry(
|
|
IF_BUCKET_HEAD( dwIfBucket ), dwIfIndex,
|
|
dwIfNextHopAddr
|
|
);
|
|
|
|
if ( pieIfEntry == NULL )
|
|
{
|
|
TRACE2(
|
|
SCOPE, "Interface (%lx-%lx) not found", dwIfIndex,
|
|
dwIfNextHopAddr
|
|
);
|
|
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
if ( bUpdatePass )
|
|
{
|
|
//
|
|
// Verify the interface is still owned by the same protocol
|
|
// as when you made the scan pass.
|
|
// If not the protocol on the interface (on the scan pass)
|
|
// has released the interface and there is no update to be done.
|
|
//
|
|
|
|
if ( ( pieIfEntry-> dwOwningProtocol != dwIfProtocol ) ||
|
|
( pieIfEntry-> dwOwningComponent != dwIfComponent ) )
|
|
{
|
|
TRACE2(
|
|
SCOPE, "Ne protocol on interface (%lx-%lx)", dwIfIndex,
|
|
dwIfNextHopAddr
|
|
);
|
|
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
//
|
|
// On the scan pass, store the protocol on the interface.
|
|
// We need to verify that the protocol remains the same
|
|
// between the scan and update passes.
|
|
//
|
|
|
|
dwIfProtocol = pieIfEntry-> dwOwningProtocol;
|
|
|
|
dwIfComponent = pieIfEntry-> dwOwningComponent;
|
|
}
|
|
|
|
|
|
//
|
|
// Merge temp and master group lists
|
|
//
|
|
|
|
ACQUIRE_TEMP_GROUP_LOCK_EXCLUSIVE();
|
|
|
|
MergeTempAndMasterGroupLists( TEMP_GROUP_LIST_HEAD() );
|
|
|
|
RELEASE_TEMP_GROUP_LOCK_EXCLUSIVE();
|
|
|
|
|
|
//
|
|
// Lock the master group list for reading
|
|
//
|
|
|
|
ACQUIRE_MASTER_GROUP_LOCK_SHARED( );
|
|
|
|
//
|
|
// Check if wild card recevier (*, *) for this interface. If it is
|
|
// note this. i.e. mark as added by protocol and numaddsbyRp = 1.
|
|
//
|
|
// N.B.
|
|
// You are scanning the master group list for the
|
|
// WILDCARD_GROUP. This is not as expensive as it seems since the
|
|
// WC entry if present would right at the beginning of the master
|
|
// list.
|
|
//
|
|
|
|
if ( FindGroupEntry(
|
|
MASTER_GROUP_LIST_HEAD(), WILDCARD_GROUP,
|
|
WILDCARD_GROUP_MASK, &pgeWC, FALSE
|
|
) )
|
|
{
|
|
//
|
|
// Lock this group entry to prevent changes to its OIF list
|
|
// while unblokcing is in progress
|
|
//
|
|
|
|
ACQUIRE_GROUP_ENTRY_LOCK_SHARED( pgeWC );
|
|
bWCGrpLock = TRUE;
|
|
|
|
dwWCBucket = SOURCE_TABLE_HASH(
|
|
WILDCARD_SOURCE, WILDCARD_SOURCE_MASK
|
|
);
|
|
|
|
if ( FindSourceEntry(
|
|
SOURCE_BUCKET_HEAD( pgeWC, dwWCBucket ),
|
|
WILDCARD_SOURCE, WILDCARD_SOURCE_MASK, &pseWC, TRUE
|
|
) )
|
|
{
|
|
//
|
|
// (*, *) entry present, check if dwIfIndex is present in its
|
|
// OIF list
|
|
//
|
|
|
|
if ( FindOutInterfaceEntry(
|
|
&pseWC-> leOutIfList, pieIfEntry-> dwIfIndex,
|
|
pieIfEntry-> dwIfNextHopAddr,
|
|
pieIfEntry->dwOwningProtocol,
|
|
pieIfEntry-> dwOwningComponent, &bNewComp, &poie
|
|
) )
|
|
{
|
|
//
|
|
// This interface is a wildcard receiver. Note this as
|
|
// added by routing protocol since IGMP would never be
|
|
// a (*, *) receiver
|
|
//
|
|
|
|
wWCGroupAddedBy = poie-> wAddedByFlag;
|
|
wWCGroupNumAddsByRP = poie-> wNumAddsByRP;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
for ( pleGrpHead = MASTER_GROUP_LIST_HEAD(),
|
|
pleGrp = pleGrpHead-> Flink;
|
|
pleGrp != pleGrpHead;
|
|
pleGrp = pleGrp-> Flink )
|
|
{
|
|
//
|
|
// For each group in the master list
|
|
//
|
|
|
|
pge = CONTAINING_RECORD( pleGrp, GROUP_ENTRY, leGrpList );
|
|
|
|
//
|
|
// Skip the (*, *) entry. i.e. Skip the wildcard group.
|
|
// This group entry has already been examined above (just
|
|
// before the for loop). There is no need to look at this
|
|
// entry as the ref. counts for this entry have been collected
|
|
// above. In addition the "group entry lock" for this entry
|
|
// has been acquired above and attempting to reacquire it will
|
|
// lead to DEAD-LOCK. This presents only a minor inconvience
|
|
// in this "for" loop i.e. having to check and skip this entry.
|
|
//
|
|
|
|
if ( IS_WILDCARD_GROUP( pge-> dwGroupAddr, pge-> dwGroupMask ) )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// check is in range specified
|
|
//
|
|
|
|
if ( INET_CMP( pge-> dwGroupAddr, dwLastGroup, iCmp ) > 0 )
|
|
{
|
|
//
|
|
// The master group list is ordered by group number and
|
|
// the high end of the range has been crossed. Quit
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
if ( INET_CMP( pge-> dwGroupAddr, dwFirstGroup, iCmp ) < 0 )
|
|
{
|
|
//
|
|
// Skip groups entries smaller than the lower end of the
|
|
// range
|
|
//
|
|
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// Group entry in range specified
|
|
//
|
|
|
|
ACQUIRE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
|
|
|
|
|
|
//
|
|
// This group entry inherits the counts from the wildcard
|
|
// group entry
|
|
//
|
|
|
|
wGroupAddedBy = wWCGroupAddedBy;
|
|
wGroupNumAddsByRP = wWCGroupNumAddsByRP;
|
|
wGroupNumAddsByIGMP = 0;
|
|
|
|
|
|
//
|
|
// Check if there are group memberships for the wildcard source
|
|
// that have been scoped. Update interface counts appropriately
|
|
//
|
|
|
|
dwWCBucket = SOURCE_TABLE_HASH(
|
|
WILDCARD_SOURCE, WILDCARD_SOURCE_MASK
|
|
);
|
|
|
|
if ( FindSourceEntry(
|
|
SOURCE_BUCKET_HEAD( pge, dwWCBucket ), WILDCARD_SOURCE,
|
|
WILDCARD_SOURCE_MASK, &pseWC, TRUE
|
|
) )
|
|
{
|
|
//
|
|
// Wild card source present. Check if this interface
|
|
// is present in its scoped i/f list
|
|
//
|
|
|
|
if ( FindOutInterfaceEntry(
|
|
&pseWC-> leScopedIfList, pieIfEntry-> dwIfIndex,
|
|
pieIfEntry-> dwIfNextHopAddr,
|
|
pieIfEntry-> dwOwningProtocol,
|
|
pieIfEntry-> dwOwningComponent,
|
|
&bNewComp, &poie
|
|
) )
|
|
{
|
|
//
|
|
// Wildcard member ship present present on the interface.
|
|
// Note it by updating counts
|
|
//
|
|
|
|
wGroupAddedBy |= poie-> wAddedByFlag;
|
|
|
|
wGroupNumAddsByRP += poie-> wNumAddsByRP;
|
|
|
|
wGroupNumAddsByIGMP = poie-> wNumAddsByIGMP;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Merge the temp and master source lists, before walking
|
|
// the source list
|
|
//
|
|
|
|
MergeTempAndMasterSourceLists( pge );
|
|
|
|
|
|
//
|
|
// for each source entry
|
|
//
|
|
|
|
pleSrcHead = MASTER_SOURCE_LIST_HEAD( pge );
|
|
|
|
for ( pleSrc = pleSrcHead-> Flink;
|
|
pleSrc != pleSrcHead;
|
|
pleSrc = pleSrc-> Flink )
|
|
{
|
|
pse = CONTAINING_RECORD( pleSrc, SOURCE_ENTRY, leSrcList );
|
|
|
|
//
|
|
// each source entry inherits the aggregated counts of
|
|
// the wildcard group (*, *) and the wildcard source (*, G)
|
|
// entry
|
|
//
|
|
|
|
wSourceAddedBy = wGroupAddedBy;
|
|
wSourceNumAddsByRP = wGroupNumAddsByRP;
|
|
wSourceNumAddsByIGMP = wGroupNumAddsByIGMP;
|
|
|
|
|
|
//
|
|
// Check if interface being unblocked is present in
|
|
// the scoped i/f list for this source
|
|
//
|
|
|
|
if ( FindOutInterfaceEntry(
|
|
&pse-> leScopedIfList, pieIfEntry-> dwIfIndex,
|
|
pieIfEntry-> dwIfNextHopAddr,
|
|
pieIfEntry-> dwOwningProtocol,
|
|
pieIfEntry-> dwOwningComponent, &bNewComp, &poie
|
|
) )
|
|
{
|
|
//
|
|
// If this is not the wildcard source entry, presence
|
|
// of this interface in the scoped i/f list indicates
|
|
// that a source specific join for this group was
|
|
// performed. Note the counts for this interface for
|
|
// the source specific join
|
|
//
|
|
|
|
if ( !IS_WILDCARD_SOURCE(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask
|
|
) )
|
|
{
|
|
wSourceAddedBy |= poie-> wAddedByFlag;
|
|
|
|
wSourceNumAddsByRP += poie-> wNumAddsByRP;
|
|
|
|
wSourceNumAddsByIGMP += poie-> wNumAddsByIGMP;
|
|
}
|
|
|
|
|
|
//
|
|
// The function name says it.
|
|
//
|
|
|
|
if ( bUpdatePass )
|
|
{
|
|
UnScopeIfAndInvokeCallbacks( pge, pse, poie );
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------
|
|
// Part 2 : MFE Update
|
|
//-----------------------------------------------------------
|
|
|
|
if ( IS_VALID_INTERFACE(
|
|
pse-> dwInIfIndex, pse-> dwInIfNextHopAddr
|
|
) )
|
|
{
|
|
//
|
|
// This is an MFE
|
|
//
|
|
|
|
//
|
|
// Check if the interface being unblocked is the
|
|
// incoming interface for this MFE
|
|
//
|
|
|
|
if ( ( pse-> dwInIfIndex == pieIfEntry-> dwIfIndex ) &&
|
|
( pse-> dwInIfNextHopAddr ==
|
|
pieIfEntry-> dwIfNextHopAddr ) )
|
|
{
|
|
//
|
|
// The incoming interface is being unblocked.
|
|
// That implies this MFE is currently a negative.
|
|
// The easiest way to re-create the correct MFE
|
|
// is to delete the MFE and force its re-creation
|
|
// when the next packet arrives from the same
|
|
// (source, group). The simplest way to delete
|
|
// the MFE and references to it in the interface
|
|
// table is to update the expiry time (set
|
|
// arbitrarily to 2 seconds here) and let the
|
|
// deletion happen via the MFETimerProc (timer.c)
|
|
//
|
|
|
|
if ( bUpdatePass )
|
|
{
|
|
RtlUpdateTimer(
|
|
TIMER_QUEUE_HANDLE(
|
|
TIMER_TABLE_HASH( pge-> dwGroupAddr )
|
|
),
|
|
pse-> hTimer, 2000, 0
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// ELSE clause comment
|
|
//
|
|
// Interface being unblocked is not the incoming
|
|
// interface. It could be an outgoing interface
|
|
// for this MFE. Check if any component is
|
|
// interested in traffic for this (S, G). To do
|
|
// this check the added by flag and if it is
|
|
// non-zero the interface should be added to the
|
|
// MFE OIF list.
|
|
//
|
|
// In addition, make sure that the incoming interface
|
|
// does not have a (scope) boundary on it. In that
|
|
// case, there is no MFE OIF list changes required.
|
|
//
|
|
|
|
else if ( wSourceAddedBy &&
|
|
( !( IS_HAS_BOUNDARY_CALLBACK() ) ||
|
|
( IS_HAS_BOUNDARY_CALLBACK() &&
|
|
!HAS_BOUNDARY_CALLBACK()(
|
|
dwIfIndex, pge-> dwGroupAddr
|
|
) ) ) )
|
|
{
|
|
if ( bUpdatePass &&
|
|
IsForwardingEnabled(
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
&leForwardList
|
|
) )
|
|
{
|
|
poie = NULL;
|
|
|
|
AddInterfaceToSourceMfe(
|
|
pge, pse, pieIfEntry-> dwIfIndex,
|
|
pieIfEntry-> dwIfNextHopAddr,
|
|
pieIfEntry-> dwOwningProtocol,
|
|
pieIfEntry-> dwOwningComponent, FALSE, &poie
|
|
);
|
|
|
|
//
|
|
// Update counts for the OIF in the MFE list
|
|
//
|
|
|
|
if ( poie != NULL )
|
|
{
|
|
poie-> wAddedByFlag = wSourceAddedBy;
|
|
poie-> wNumAddsByRP = wSourceNumAddsByRP;
|
|
poie-> wNumAddsByIGMP = wSourceNumAddsByIGMP;
|
|
}
|
|
}
|
|
|
|
else if ( !bUpdatePass )
|
|
{
|
|
AddToCheckForCreationAlertList(
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
pse-> dwSourceAddr, pse->dwSourceMask,
|
|
pse-> dwInIfIndex, pse-> dwInIfNextHopAddr,
|
|
&leForwardList
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
RELEASE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
|
|
}
|
|
|
|
//
|
|
// if lock on the Wildcard group entry is held, release it
|
|
//
|
|
|
|
if ( bWCGrpLock )
|
|
{
|
|
RELEASE_GROUP_ENTRY_LOCK_SHARED( pgeWC );
|
|
}
|
|
|
|
RELEASE_MASTER_GROUP_LOCK_SHARED( );
|
|
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
|
|
if ( !bUpdatePass )
|
|
{
|
|
dwErr = InvokeCreationAlertForList(
|
|
&leForwardList, dwIfProtocol, dwIfComponent,
|
|
dwIfIndex, dwIfNextHopAddr
|
|
);
|
|
|
|
if ( dwErr != NO_ERROR )
|
|
{
|
|
break;
|
|
}
|
|
|
|
bUpdatePass = TRUE;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
|
|
} while ( TRUE );
|
|
|
|
|
|
//
|
|
// Release all locks and decrement thread-counts etc.
|
|
//
|
|
|
|
//
|
|
// Invoke pended Join/Prune alerts
|
|
//
|
|
|
|
InvokeOutstandingCallbacks();
|
|
|
|
|
|
RELEASE_PROTOCOL_LOCK_SHARED();
|
|
|
|
FreeList( &leForwardList );
|
|
|
|
LEAVE_MGM_API();
|
|
|
|
TRACE0( SCOPE, "LEAVING MgmUnblockGroups" );
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
VOID
|
|
UnScopeIfAndInvokeCallbacks(
|
|
PGROUP_ENTRY pge,
|
|
PSOURCE_ENTRY pse,
|
|
POUT_IF_ENTRY poie
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine remove an interface entry from the scoped interface
|
|
list for the specified source entry and puts it into the outgoing
|
|
interface list. If the addition of the interface to the OIF list
|
|
requires new member callbacks to be issued to protocol components
|
|
these are issued by this routine.
|
|
|
|
|
|
Arguements :
|
|
|
|
pge - Group entry correspondong to the group being unblocked.
|
|
|
|
pse - Source entry for the group being unblocked
|
|
|
|
poie - Interface entry corresponding to the interface over which
|
|
the (source, group) entry is being unblocked
|
|
|
|
Return Value :
|
|
|
|
None
|
|
|
|
Environment :
|
|
|
|
Invoked from MgmUnBlockGroups. Assumes the protocol list and
|
|
interface bucket are locked for read, and the group entry is
|
|
locked for write.
|
|
|
|
--*/
|
|
{
|
|
BOOL bFound, bNewComp = FALSE;
|
|
|
|
PPROTOCOL_ENTRY ppe;
|
|
|
|
POUT_IF_ENTRY poieNext = NULL;
|
|
|
|
|
|
do
|
|
{
|
|
//
|
|
// Remove interface entry from the scoped I/f list
|
|
//
|
|
|
|
RemoveEntryList( &poie-> leIfList );
|
|
|
|
|
|
//
|
|
// Find its place in the OIF list for the source entry
|
|
// and insert it in
|
|
//
|
|
|
|
bFound = FindOutInterfaceEntry(
|
|
&pse-> leOutIfList, poie-> dwIfIndex,
|
|
poie-> dwIfNextHopAddr, poie-> dwProtocolId,
|
|
poie-> dwComponentId, &bNewComp, &poieNext
|
|
);
|
|
|
|
if ( bFound )
|
|
{
|
|
//
|
|
// Trouble. The interface to be inserted should not be
|
|
// present in the OIF list for the source entry. Since it
|
|
// print a warning message and move on.
|
|
//
|
|
|
|
TRACE4(
|
|
ANY, "Interface (%d-%d) present in OIF list of (%x-%x)"
|
|
" inspite of being scoped", poie-> dwIfIndex,
|
|
poie-> dwIfNextHopAddr, pse-> dwSourceAddr, pge-> dwGroupAddr
|
|
);
|
|
|
|
MGM_FREE( poie );
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
InsertTailList(
|
|
( poieNext == NULL ) ? &pse-> leOutIfList :
|
|
&poieNext-> leIfList,
|
|
&poie-> leIfList
|
|
);
|
|
|
|
|
|
//
|
|
// if new component, update component count and
|
|
// call callback invoker
|
|
//
|
|
|
|
if ( bNewComp )
|
|
{
|
|
pse-> dwOutCompCount++;
|
|
|
|
ppe = GetProtocolEntry(
|
|
PROTOCOL_LIST_HEAD(), poie-> dwProtocolId,
|
|
poie-> dwComponentId
|
|
);
|
|
|
|
if ( ppe == NULL )
|
|
{
|
|
//
|
|
// Trouble. Interface present without any owning
|
|
// protocol component.
|
|
//
|
|
|
|
TRACE4(
|
|
ANY, "Owning protocol(%d, %) for interface(%d, %d)"
|
|
" not found", poie-> dwProtocolId, poie-> dwComponentId,
|
|
poie-> dwIfIndex, poie-> dwIfNextHopAddr
|
|
);
|
|
|
|
return;
|
|
}
|
|
|
|
InvokeJoinAlertCallbacks(
|
|
pge, pse, poie, IS_ADDED_BY_IGMP( poie ), ppe
|
|
);
|
|
}
|
|
|
|
} while ( FALSE );
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
InvokeJoinAlertCallbacks(
|
|
PGROUP_ENTRY pge,
|
|
PSOURCE_ENTRY pse,
|
|
POUT_IF_ENTRY poie,
|
|
BOOL bIGMP,
|
|
PPROTOCOL_ENTRY ppe
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine invokes New Member callbacks in response to a new
|
|
protocol component being added to the outgoing interface list
|
|
of a source entry. New member callbacks are issued according
|
|
to interop rules.
|
|
|
|
Argumements :
|
|
|
|
pge - Entry corresponding to group for which new member callbacks
|
|
are being issued.
|
|
|
|
pse - Entry corresponding to source for which new member callbacks
|
|
are being issued.
|
|
|
|
poie - Entry corresponding to interface whose addition triggered the
|
|
callback mechanism.
|
|
|
|
bIGMP - Indicates if IGMP is adding this interface.
|
|
|
|
ppe - Protocol entry for the protocol component that owns the interface
|
|
corresponding to poie.
|
|
|
|
Return Value :
|
|
|
|
None
|
|
|
|
|
|
Environment :
|
|
|
|
Invoked from AddInterfaceToSourceEntry and UnScopeIfAndInvokeCallbacks
|
|
|
|
--*/
|
|
{
|
|
PPROTOCOL_ENTRY ppeEntry;
|
|
|
|
POUT_IF_ENTRY poiePrev;
|
|
|
|
PLIST_ENTRY ple, pleStart;
|
|
|
|
|
|
|
|
//
|
|
// Check if Source specific join
|
|
//
|
|
|
|
if ( !IS_WILDCARD_SOURCE( pse-> dwSourceAddr, pse-> dwSourceMask ) )
|
|
{
|
|
if ( pse-> dwOutCompCount == 1 )
|
|
{
|
|
|
|
TRACESCOPE0( GROUP, "First component in OIL for source specific" );
|
|
|
|
AddToOutstandingJoinList(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
poie-> dwIfIndex, poie-> dwIfNextHopAddr,
|
|
TRUE
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
else if ( pse-> dwOutCompCount == 1 )
|
|
{
|
|
TRACESCOPE0( GROUP, "First component in OIL" );
|
|
|
|
//
|
|
// Interaction between routing protocols.
|
|
//
|
|
|
|
//
|
|
// first component in the OIL.
|
|
//
|
|
// Send new member callback to all the other (than the
|
|
// the one adding this group membership on
|
|
// this interface) routing protocol components
|
|
//
|
|
// At this point you have a read lock on the protocol list
|
|
// so you can walk the list
|
|
//
|
|
|
|
pleStart = PROTOCOL_LIST_HEAD();
|
|
|
|
for ( ple = pleStart-> Flink; ple != pleStart; ple = ple-> Flink )
|
|
{
|
|
ppeEntry = CONTAINING_RECORD(
|
|
ple, PROTOCOL_ENTRY, leProtocolList
|
|
);
|
|
|
|
//
|
|
// all OTHER protocol components need to be told of the
|
|
// interface addition. So skip the component adding
|
|
// this interface.
|
|
//
|
|
|
|
if ( ( ppeEntry-> dwProtocolId == ppe-> dwProtocolId ) &&
|
|
( ppeEntry-> dwComponentId == ppe-> dwComponentId ) )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// if routing protocol has requested new member callback
|
|
//
|
|
|
|
if ( IS_JOIN_ALERT( ppeEntry ) )
|
|
{
|
|
JOIN_ALERT( ppeEntry )(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask, TRUE
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// if second component to add an interface to the OIL
|
|
// invoke new member callback to first component.
|
|
//
|
|
// Note :
|
|
// If the first component that added a group membership
|
|
// was IGMP skip JOIN_ALERT callback.
|
|
//
|
|
|
|
else if ( pse-> dwOutCompCount == 2 )
|
|
{
|
|
TRACESCOPE0( GROUP, "Second component in OIL" );
|
|
|
|
//
|
|
// find the "other (first)" routing protocol component to add
|
|
// an interface to the OIL
|
|
//
|
|
|
|
for ( ple = pse-> leOutIfList.Flink;
|
|
ple != &pse-> leOutIfList;
|
|
ple = ple-> Flink )
|
|
{
|
|
poiePrev = CONTAINING_RECORD(
|
|
ple, OUT_IF_ENTRY, leIfList
|
|
);
|
|
|
|
//
|
|
// if the protocol component that added this interface to
|
|
// the OIL is different indicating that it is the other
|
|
// component invoke its new member interface
|
|
//
|
|
|
|
if ( ( poiePrev-> dwProtocolId != ppe-> dwProtocolId ) ||
|
|
( poiePrev-> dwComponentId != ppe-> dwComponentId ) )
|
|
{
|
|
|
|
//
|
|
// Find the protocol entry for the other interface
|
|
//
|
|
|
|
ppeEntry = GetProtocolEntry(
|
|
&ig.mllProtocolList.leHead,
|
|
poiePrev-> dwProtocolId,
|
|
poiePrev-> dwComponentId
|
|
);
|
|
|
|
if ( ppeEntry == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokeJoinAlertCallbacks : Could not"
|
|
"find protocol %x, %x", poie-> dwProtocolId,
|
|
poie-> dwComponentId
|
|
);
|
|
}
|
|
|
|
else if ( IS_ROUTING_PROTOCOL( ppeEntry ) &&
|
|
IS_JOIN_ALERT( ppeEntry ) )
|
|
{
|
|
//
|
|
// JOIN_ALERT callback will be skipped if
|
|
// the first component is IGMP
|
|
//
|
|
|
|
JOIN_ALERT( ppeEntry )(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask, TRUE
|
|
);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// if this group membership was added by IGMP, and
|
|
// a routing protocol co-exists with IGMP on this interface
|
|
// inform the routing protocol too.
|
|
//
|
|
|
|
if ( bIGMP && IS_ROUTING_PROTOCOL( ppe ) )
|
|
{
|
|
if ( IS_LOCAL_JOIN_ALERT( ppe ) )
|
|
{
|
|
LOCAL_JOIN_ALERT( ppe )(
|
|
pse-> dwSourceAddr, pse-> dwSourceMask,
|
|
pge-> dwGroupAddr, pge-> dwGroupMask,
|
|
poie-> dwIfIndex, poie-> dwIfNextHopAddr
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
DWORD
|
|
AddToOutstandingJoinList(
|
|
DWORD dwSourceAddr,
|
|
DWORD dwSourceMask,
|
|
DWORD dwGroupAddr,
|
|
DWORD dwGroupMask,
|
|
DWORD dwIfIndex,
|
|
DWORD dwIfNextHopAddr,
|
|
BOOL bJoin
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine adds a Join entry to the global outstanding join list.
|
|
Each entry in this list represents a "source specific" join/leave for
|
|
which the corresponding join/prune alerts have not yet been issued.
|
|
The reason for deferring the callbacks has to do with the order of
|
|
locking of buckets in the IF HASH table. When a membership is
|
|
added/deleted a lock is taken on the interface bucket that contains
|
|
the interface on which the membership is being changed. When the
|
|
source entry for which the membership is being changed has been
|
|
updated you determine (as per interop rules) whether
|
|
a join/prune needs to be issued to the protocol on the incoming
|
|
interface. If it must you need to look up the incoming interface
|
|
and then find the protocol on that interface and invoke its callbacks.
|
|
To do this you need to look up the incoming interface in the
|
|
IF hash table and locking the bucket for that IF entry. You lock two
|
|
buckets simultaneously. Hence the deferral
|
|
|
|
|
|
Arguements :
|
|
|
|
dwSourceAddr - Source address for which a join/leave has occured
|
|
|
|
dwSourceMask - Mask corresponding to dwSourceAddr
|
|
|
|
dwGroupAddr - Group for which a join/leave has occured
|
|
|
|
dwGroupMask - Mask corresponding to dwGroupAddr
|
|
|
|
dwIfIndex - Incoming interface index as per the MCAST RIB
|
|
|
|
dwIfNextHopAddr - Next hop address corresponding to dwIfIndex
|
|
|
|
bJoin - Indicates if an outstanding entry is being added because of a
|
|
join or leave
|
|
|
|
|
|
Return Value :
|
|
|
|
NO_ERROR - Success
|
|
|
|
ERROR_NOT_ENOUGH_MEMORY - failed to allocate a join entry
|
|
|
|
|
|
Environment :
|
|
|
|
Invoked in the context of Invoke[PruneAlert/JoinAlert]Callbacks
|
|
|
|
--*/
|
|
{
|
|
BOOL bFound;
|
|
|
|
DWORD dwErr = NO_ERROR;
|
|
|
|
PJOIN_ENTRY pje = NULL, pjeNew;
|
|
|
|
|
|
ACQUIRE_JOIN_LIST_LOCK_EXCLUSIVE();
|
|
|
|
do
|
|
{
|
|
bFound = FindJoinEntry(
|
|
JOIN_LIST_HEAD(), dwSourceAddr, dwSourceMask,
|
|
dwGroupAddr, dwGroupMask, dwIfIndex, dwIfNextHopAddr,
|
|
&pje
|
|
);
|
|
|
|
if ( bFound )
|
|
{
|
|
//
|
|
// Join entry already exists for this interface.
|
|
// Check if it is of the same type
|
|
//
|
|
|
|
if ( pje-> bJoin != bJoin )
|
|
{
|
|
//
|
|
// Join entries of different types, null each other
|
|
// remove this join entry
|
|
//
|
|
|
|
RemoveEntryList( &pje-> leJoinList );
|
|
|
|
MGM_FREE( pje );
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
//
|
|
// Join entry does not exist. Create one and insert it.
|
|
//
|
|
|
|
pjeNew = MGM_ALLOC( sizeof( JOIN_ENTRY ) );
|
|
|
|
if ( pjeNew == NULL )
|
|
{
|
|
dwErr = ERROR_NOT_ENOUGH_MEMORY;
|
|
|
|
TRACE1( ANY, "Failed to create Join Entry : %x", dwErr );
|
|
|
|
break;
|
|
}
|
|
|
|
InitializeListHead( &pjeNew-> leJoinList );
|
|
|
|
pjeNew-> dwSourceAddr = dwSourceAddr;
|
|
|
|
pjeNew-> dwSourceMask = dwSourceMask;
|
|
|
|
pjeNew-> dwGroupAddr = dwGroupAddr;
|
|
|
|
pjeNew-> dwGroupMask = dwGroupMask;
|
|
|
|
pjeNew-> dwIfIndex = dwIfIndex;
|
|
|
|
pjeNew-> dwIfNextHopAddr = dwIfNextHopAddr;
|
|
|
|
pjeNew-> bJoin = bJoin;
|
|
|
|
InsertTailList(
|
|
( pje == NULL ) ? JOIN_LIST_HEAD() : &pje-> leJoinList,
|
|
&pjeNew-> leJoinList
|
|
);
|
|
}
|
|
|
|
} while ( FALSE );
|
|
|
|
RELEASE_JOIN_LIST_LOCK_EXCLUSIVE();
|
|
|
|
return dwErr;
|
|
}
|
|
|
|
|
|
|
|
|
|
PJOIN_ENTRY
|
|
GetNextJoinEntry(
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This function removes the first outstanding join entry and returns it
|
|
|
|
|
|
Arguements :
|
|
|
|
|
|
Return Values :
|
|
|
|
NULL - if outstanding join list is empty
|
|
|
|
pointer to a join entry otherwise
|
|
|
|
|
|
Environment :
|
|
|
|
Invoked from InvokeOutstandingCallbacks
|
|
|
|
--*/
|
|
{
|
|
PLIST_ENTRY ple;
|
|
|
|
PJOIN_ENTRY pje = NULL;
|
|
|
|
|
|
ACQUIRE_JOIN_LIST_LOCK_EXCLUSIVE();
|
|
|
|
if ( !IsListEmpty( JOIN_LIST_HEAD() ) )
|
|
{
|
|
ple = RemoveHeadList( JOIN_LIST_HEAD() );
|
|
|
|
pje = CONTAINING_RECORD( ple, JOIN_ENTRY, leJoinList );
|
|
}
|
|
|
|
RELEASE_JOIN_LIST_LOCK_EXCLUSIVE();
|
|
|
|
return pje;
|
|
}
|
|
|
|
|
|
|
|
|
|
BOOL
|
|
FindJoinEntry(
|
|
PLIST_ENTRY pleJoinList,
|
|
DWORD dwSourceAddr,
|
|
DWORD dwSourceMask,
|
|
DWORD dwGroupAddr,
|
|
DWORD dwGroupMask,
|
|
DWORD dwIfIndex,
|
|
DWORD dwIfNextHopAddr,
|
|
PJOIN_ENTRY * ppje
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine finds a specified join entry in the outstanding join list.
|
|
|
|
|
|
Arguements :
|
|
pleJoinList - Join list to be searched
|
|
|
|
dwSourceAddr - Source address for which a join/leave has occured
|
|
|
|
dwSourceMask - Mask corresponding to dwSourceAddr
|
|
|
|
dwGroupAddr - Group for which a join/leave has occured
|
|
|
|
dwGroupMask - Mask corresponding to dwGroupAddr
|
|
|
|
dwIfIndex - Incoming interface index as per the MCAST RIB
|
|
|
|
dwIfNextHopAddr - Next hop address corresponding to dwIfIndex
|
|
|
|
ppje - a pointer to join entry if found or
|
|
a pointer to the next element in the join list if it exists or
|
|
NULL
|
|
|
|
|
|
Return Values :
|
|
|
|
TRUE - Join entry found
|
|
|
|
FALSE - Join entry not found
|
|
|
|
|
|
Environment :
|
|
|
|
Invoked from AddToOutstandingJoinList
|
|
--*/
|
|
{
|
|
INT iCmp;
|
|
|
|
PLIST_ENTRY ple = NULL;
|
|
|
|
PJOIN_ENTRY pje = NULL;
|
|
|
|
BOOL bFound = FALSE;
|
|
|
|
|
|
|
|
*ppje = NULL;
|
|
|
|
|
|
for ( ple = pleJoinList-> Flink; ple != pleJoinList; ple = ple-> Flink )
|
|
{
|
|
pje = CONTAINING_RECORD( ple, JOIN_ENTRY, leJoinList );
|
|
|
|
if ( INET_CMP( pje-> dwGroupAddr, dwGroupAddr, iCmp ) < 0 )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
else if ( iCmp > 0 )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
*ppje = pje;
|
|
break;
|
|
}
|
|
|
|
|
|
if ( INET_CMP( pje-> dwSourceAddr, dwSourceAddr, iCmp ) < 0 )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
else if ( iCmp > 0 )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
*ppje = pje;
|
|
break;
|
|
}
|
|
|
|
|
|
if ( pje-> dwIfIndex < dwIfIndex )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
else if ( pje-> dwIfIndex > dwIfIndex )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
*ppje = pje;
|
|
break;
|
|
}
|
|
|
|
|
|
if ( INET_CMP( pje-> dwIfNextHopAddr, dwIfNextHopAddr, iCmp ) < 0 )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
else if ( iCmp > 0 )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
*ppje = pje;
|
|
break;
|
|
}
|
|
|
|
|
|
//
|
|
// entry found
|
|
//
|
|
|
|
*ppje = pje;
|
|
|
|
bFound = TRUE;
|
|
|
|
break;
|
|
}
|
|
|
|
return bFound;
|
|
}
|
|
|
|
|
|
|
|
|
|
VOID
|
|
InvokeOutstandingCallbacks(
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
This routine walks the global outstanding join list, and for each entry
|
|
finds the incoming interface and the protocol on it and invokes the
|
|
appropriate callback (JoinAlert/PruneAlert).
|
|
|
|
|
|
Arguements :
|
|
|
|
|
|
Return Values :
|
|
|
|
|
|
Environment :
|
|
|
|
Whenever a source specific join or leave occurs or when scoped boundaries
|
|
change.
|
|
--*/
|
|
{
|
|
BOOL bFound;
|
|
|
|
DWORD dwIfBucket;
|
|
|
|
PJOIN_ENTRY pje;
|
|
|
|
PIF_ENTRY pie;
|
|
|
|
PPROTOCOL_ENTRY ppe;
|
|
|
|
DWORD dwErr;
|
|
|
|
RTM_NET_ADDRESS rnaAddr;
|
|
|
|
RTM_DEST_INFO rdiDest;
|
|
|
|
RTM_NEXTHOP_INFO rniNextHop;
|
|
|
|
BOOL bRelDest, bRelNextHop, bRelIfLock;
|
|
|
|
HANDLE hNextHop;
|
|
|
|
|
|
//
|
|
// While there are join entries
|
|
// - Get the next join entry
|
|
// - Look source and find incoming interface
|
|
// - Find the interface entry and get the protocol on that i/f
|
|
// - invoke its callback
|
|
//
|
|
|
|
while ( ( pje = GetNextJoinEntry() ) != NULL )
|
|
{
|
|
bRelDest = bRelNextHop = bRelIfLock = FALSE;
|
|
|
|
do
|
|
{
|
|
//
|
|
// Get route to source
|
|
//
|
|
|
|
RTM_IPV4_MAKE_NET_ADDRESS(
|
|
&rnaAddr, pje-> dwSourceAddr, IPv4_ADDR_LEN
|
|
);
|
|
|
|
dwErr = RtmGetMostSpecificDestination(
|
|
g_hRtmHandle, &rnaAddr, RTM_BEST_PROTOCOL,
|
|
RTM_VIEW_MASK_MCAST, &rdiDest
|
|
);
|
|
|
|
if ( dwErr != NO_ERROR )
|
|
{
|
|
TRACE1(
|
|
ANY, "InvokeOutstandingCallbacks : Failed to lookup "
|
|
"route : %x", dwErr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
bRelDest = TRUE;
|
|
|
|
|
|
//
|
|
// Select next hop info
|
|
//
|
|
|
|
hNextHop = SelectNextHop( &rdiDest );
|
|
|
|
if ( hNextHop == NULL )
|
|
{
|
|
TRACE1(
|
|
ANY, "InvokeOutstandingCallbacks : Failed to select "
|
|
"next hop : %x", dwErr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
//
|
|
// Get nexthop info
|
|
//
|
|
|
|
dwErr = RtmGetNextHopInfo(
|
|
g_hRtmHandle, hNextHop, &rniNextHop
|
|
);
|
|
|
|
if ( dwErr != NO_ERROR )
|
|
{
|
|
TRACE1(
|
|
ANY, "InvokeOutstandingCallbacks : Failed to get "
|
|
"next hop info : %x", dwErr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
bRelNextHop = TRUE;
|
|
|
|
|
|
//
|
|
// Find the incming interface entry
|
|
//
|
|
|
|
dwIfBucket = IF_TABLE_HASH( rniNextHop.InterfaceIndex );
|
|
|
|
ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
|
|
bRelIfLock = TRUE;
|
|
|
|
bFound = FindIfEntry(
|
|
IF_BUCKET_HEAD( dwIfBucket ), rniNextHop.InterfaceIndex,
|
|
0, &pie
|
|
);
|
|
|
|
if ( ( pie == NULL ) ||
|
|
( !bFound &&
|
|
pie-> dwIfIndex != rniNextHop.InterfaceIndex ) )
|
|
{
|
|
//
|
|
// No interface with the specified ID exists.
|
|
// Nothing to be done
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
//
|
|
// Check if the interface on which JOIN/PRUNE occured is
|
|
// the same as the incoming interface.
|
|
//
|
|
// If so skip it.
|
|
//
|
|
|
|
if ( ( pje-> dwIfIndex == pie-> dwIfIndex ) &&
|
|
( pje-> dwIfNextHopAddr == pie-> dwIfNextHopAddr ) )
|
|
{
|
|
//
|
|
// No join/prune required
|
|
//
|
|
|
|
TRACEGROUP2(
|
|
GROUP, "No callback as incoming if == joined/pruned "
|
|
"if 0x%x 0x%x",
|
|
pje-> dwIfIndex, pje-> dwIfNextHopAddr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
ppe = GetProtocolEntry(
|
|
PROTOCOL_LIST_HEAD(), pie-> dwOwningProtocol,
|
|
pie-> dwOwningComponent
|
|
);
|
|
|
|
if ( ppe == NULL )
|
|
{
|
|
//
|
|
// No protocol present for interface entry. Strange
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
if ( pje-> bJoin )
|
|
{
|
|
if ( IS_JOIN_ALERT( ppe ) )
|
|
{
|
|
JOIN_ALERT( ppe )(
|
|
pje-> dwSourceAddr, pje-> dwSourceMask,
|
|
pje-> dwGroupAddr, pje-> dwGroupMask,
|
|
TRUE
|
|
);
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
if ( IS_PRUNE_ALERT( ppe ) )
|
|
{
|
|
PRUNE_ALERT( ppe )(
|
|
pje-> dwSourceAddr, pje-> dwSourceMask,
|
|
pje-> dwGroupAddr, pje-> dwGroupMask,
|
|
pje-> dwIfIndex, pje-> dwIfNextHopAddr,
|
|
TRUE, NULL
|
|
);
|
|
}
|
|
}
|
|
|
|
} while ( FALSE );
|
|
|
|
MGM_FREE( pje );
|
|
|
|
if ( bRelIfLock )
|
|
{
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
}
|
|
|
|
if ( bRelDest )
|
|
{
|
|
dwErr = RtmReleaseDestInfo( g_hRtmHandle, &rdiDest );
|
|
|
|
if ( dwErr != NO_ERROR )
|
|
{
|
|
TRACE1( ANY, "Failed to release dest info : %x", dwErr );
|
|
}
|
|
}
|
|
|
|
if ( bRelNextHop )
|
|
{
|
|
dwErr = RtmReleaseNextHopInfo( g_hRtmHandle, &rniNextHop );
|
|
|
|
if ( dwErr != NO_ERROR )
|
|
{
|
|
TRACE1( ANY, "Failed to release dest info : %x", dwErr );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
AddToCheckForCreationAlertList(
|
|
DWORD dwGroupAddr,
|
|
DWORD dwGroupMask,
|
|
DWORD dwSourceAddr,
|
|
DWORD dwSourceMask,
|
|
DWORD dwInIfIndex,
|
|
DWORD dwInIfNextHopAddr,
|
|
PLIST_ENTRY pleForwardList
|
|
)
|
|
/*++
|
|
|
|
Routine Description :
|
|
|
|
|
|
Arguements :
|
|
|
|
|
|
Return Values :
|
|
|
|
|
|
Environment :
|
|
|
|
--*/
|
|
{
|
|
PJOIN_ENTRY pje;
|
|
|
|
|
|
//
|
|
// Create an entry in the forward list
|
|
//
|
|
|
|
pje = MGM_ALLOC( sizeof( JOIN_ENTRY ) );
|
|
|
|
if ( pje == NULL )
|
|
{
|
|
TRACE0( ANY, "Failed to allocate forward list entry" );
|
|
|
|
return;
|
|
}
|
|
|
|
InitializeListHead( &pje-> leJoinList );
|
|
|
|
pje-> dwSourceAddr = dwSourceAddr;
|
|
|
|
pje-> dwSourceMask = dwSourceMask;
|
|
|
|
pje-> dwGroupAddr = dwGroupAddr;
|
|
|
|
pje-> dwGroupMask = dwGroupMask;
|
|
|
|
pje-> dwIfIndex = dwInIfIndex;
|
|
|
|
pje-> dwIfNextHopAddr = dwInIfNextHopAddr;
|
|
|
|
pje-> bJoin = TRUE;
|
|
|
|
|
|
//
|
|
// Insert at the end of the list
|
|
//
|
|
|
|
InsertTailList( pleForwardList, &pje-> leJoinList );
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
BOOL
|
|
IsForwardingEnabled(
|
|
DWORD dwGroupAddr,
|
|
DWORD dwGroupMask,
|
|
DWORD dwSourceAddr,
|
|
DWORD dwSourceMask,
|
|
PLIST_ENTRY pleForwardList
|
|
)
|
|
/*++
|
|
--*/
|
|
{
|
|
PLIST_ENTRY ple, pleTemp;
|
|
|
|
PJOIN_ENTRY pje;
|
|
|
|
BOOL bEnable = FALSE;
|
|
|
|
INT iCmp;
|
|
|
|
|
|
|
|
//
|
|
// find the source group entry and
|
|
// check if forwarding is enabled for it
|
|
//
|
|
|
|
ple = pleForwardList-> Flink;
|
|
|
|
while ( ple != pleForwardList )
|
|
{
|
|
pje = CONTAINING_RECORD( ple, JOIN_ENTRY, leJoinList );
|
|
|
|
if ( INET_CMP( pje-> dwGroupAddr, dwGroupAddr, iCmp ) < 0 )
|
|
{
|
|
pleTemp = ple-> Flink;
|
|
|
|
RemoveEntryList( ple );
|
|
|
|
MGM_FREE( pje );
|
|
|
|
ple = pleTemp;
|
|
|
|
continue;
|
|
}
|
|
|
|
else if ( iCmp > 0 )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
if ( INET_CMP( pje-> dwSourceAddr, dwSourceAddr, iCmp ) < 0 )
|
|
{
|
|
pleTemp = ple-> Flink;
|
|
|
|
RemoveEntryList( ple );
|
|
|
|
MGM_FREE( pje );
|
|
|
|
ple = pleTemp;
|
|
|
|
continue;
|
|
}
|
|
|
|
else if ( iCmp > 0 )
|
|
{
|
|
//
|
|
// you are now past the position where an existing
|
|
// entry would be.
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
//
|
|
// found source-group entry
|
|
//
|
|
|
|
bEnable = pje-> bJoin;
|
|
|
|
RemoveEntryList( ple );
|
|
|
|
MGM_FREE( pje );
|
|
|
|
break;
|
|
}
|
|
|
|
return bEnable;
|
|
}
|
|
|
|
|
|
|
|
|
|
DWORD
|
|
InvokeCreationAlertForList(
|
|
PLIST_ENTRY pleForwardList,
|
|
DWORD dwProtocolId,
|
|
DWORD dwComponentId,
|
|
DWORD dwIfIndex,
|
|
DWORD dwIfNextHopAddr
|
|
)
|
|
{
|
|
PPROTOCOL_ENTRY ppe;
|
|
|
|
PLIST_ENTRY ple;
|
|
|
|
PJOIN_ENTRY pje;
|
|
|
|
MGM_IF_ENTRY mie;
|
|
|
|
|
|
//
|
|
// Get the protocol entry on which CREATION_ALERTs are to
|
|
// be invoked.
|
|
//
|
|
|
|
ppe = GetProtocolEntry(
|
|
PROTOCOL_LIST_HEAD(), dwProtocolId, dwComponentId
|
|
);
|
|
|
|
if ( ppe == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "Could not invoke CREATION_ALERTs since protocol"
|
|
"(%ld, %ld) not found", dwProtocolId, dwComponentId
|
|
);
|
|
|
|
return ERROR_NOT_FOUND;
|
|
}
|
|
|
|
|
|
if ( !( IS_CREATION_ALERT( ppe ) ) )
|
|
{
|
|
TRACE2(
|
|
ANY, "Protocol (%ld, %ld) does not have a CREATION_ALERT",
|
|
dwProtocolId, dwComponentId
|
|
);
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
|
|
//
|
|
// for each member of the list invoke CREATION_ALERT
|
|
//
|
|
|
|
ple = pleForwardList-> Flink;
|
|
|
|
while ( ple != pleForwardList )
|
|
{
|
|
pje = CONTAINING_RECORD( ple, JOIN_ENTRY, leJoinList );
|
|
|
|
mie.dwIfIndex = dwIfIndex;
|
|
|
|
mie.dwIfNextHopAddr = dwIfNextHopAddr;
|
|
|
|
mie.bIGMP = TRUE;
|
|
|
|
mie.bIsEnabled = pje-> bJoin;
|
|
|
|
|
|
CREATION_ALERT( ppe )(
|
|
pje-> dwSourceAddr, pje-> dwSourceMask,
|
|
pje-> dwGroupAddr, pje-> dwGroupMask,
|
|
pje-> dwIfIndex, pje-> dwIfNextHopAddr,
|
|
1, &mie
|
|
);
|
|
|
|
pje-> bJoin = mie.bIsEnabled;
|
|
|
|
ple = ple-> Flink;
|
|
}
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
|
|
VOID
|
|
WorkerFunctionInvokeCreationAlert(
|
|
PVOID pvContext
|
|
)
|
|
/*++
|
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Routine Description:
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This routine invokes the creation alert for the protocol that
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owns the interface specified in the context. This invocation
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needs to happen from a worker thread for locking reasons.
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For a group join the protocol calls into MGM via the
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MgmAddGroupMembership API. We cannot call back into the protocol
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in the context of this API call since the protocol could be holding
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locks when invoking this API which in turn may be acquired in the
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context of the callback. Hence the call back are invoked from a
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worker thread
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Parameters
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pvContext - pointer to a CREATION_ALERT_CONTEXT structure
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containing the source, group, and interface on which
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a membership join occured.
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Return Value:
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None
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Environment:
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Invoked from MgmAddGroupMembership for (*, G) and (*, *) joins.
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Calls in protocols to issue CREATION_ALERT_CALLBACK
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--*/
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{
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DWORD dwInd, dwErr, dwIfBucket, dwGrpBucket, dwSrcBucket;
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BOOL bNewComp, bIfLock = FALSE, bGrpLock = FALSE, bgeLock = FALSE;
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PIF_ENTRY pieEntry;
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PGROUP_ENTRY pge;
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PSOURCE_ENTRY pse;
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POUT_IF_ENTRY poie;
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LIST_ENTRY leSourceList;
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PCREATION_ALERT_CONTEXT pcac = (PCREATION_ALERT_CONTEXT) pvContext;
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if (!ENTER_MGM_WORKER())
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{
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TRACE0(
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ANY, "InvokeCreationAlert: Failed to enter"
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);
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MGM_FREE( pcac );
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return;
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}
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TRACE0( GROUP, "ENTERED WorkerFunctionInvokeCreationAlert" );
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//
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// Acquire protocol lock first to maintain locking order
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//
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ACQUIRE_PROTOCOL_LOCK_SHARED();
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do
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{
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dwIfBucket = IF_TABLE_HASH(
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pcac-> dwIfIndex
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);
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//
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// For wildcard group - i.e. (*, *) membership adds.
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//
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if ( IS_WILDCARD_GROUP( pcac-> dwGroupAddr, pcac-> dwGroupMask ) )
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{
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InitializeListHead( &leSourceList );
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//
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// Walk each bucket of the group table
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//
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for ( dwInd = 1; dwInd < GROUP_TABLE_SIZE; dwInd++ )
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{
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//
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// Lock the interface to prevent the (*, *)
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// membership from being deleted while MFEs
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// are being updated.
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//
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ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
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pieEntry = GetIfEntry(
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IF_BUCKET_HEAD( dwIfBucket ),
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pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
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);
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if ( pieEntry == NULL )
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{
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//
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// Interface is no longer present with MGM.
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// possibly deleted in another thread.
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// There is no further MFE update to be performed.
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// quit now.
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//
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RELEASE_IF_LOCK_SHARED( dwIfBucket );
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break;
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}
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//
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// Pass 1: Accumulate (S, G) values for all groups
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// in this group bucket into leSourceList.
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//
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AddInterfaceToAllMfeInGroupBucket(
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pcac-> dwIfIndex, pcac-> dwIfNextHopAddr,
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pcac-> dwProtocolId, pcac-> dwComponentId,
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dwInd, pcac-> bIGMP, FALSE, &leSourceList
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);
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RELEASE_IF_LOCK_SHARED( dwIfBucket );
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//
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// Invoke CREATION_ALERTs on them outside locks
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//
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dwErr = InvokeCreationAlertForList(
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&leSourceList,
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pcac-> dwProtocolId, pcac-> dwComponentId,
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pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
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);
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if ( dwErr == NO_ERROR )
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{
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//
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// Lock the interface to prevent the (*, *)
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// membership from being deleted while MFEs
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// are being updated.
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//
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ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
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pieEntry = GetIfEntry(
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IF_BUCKET_HEAD( dwIfBucket ),
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pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
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);
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if ( pieEntry == NULL )
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{
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//
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// Interface is no longer present with MGM.
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// possibly deleted in another thread.
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// There is no further MFE update to be performed.
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// quit now.
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//
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RELEASE_IF_LOCK_SHARED( dwIfBucket );
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break;
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}
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//
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// Verify that the (*, *) membership on this interface
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// is still present.
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// It could have been deleted in a separate thread.
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//
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dwGrpBucket = GROUP_TABLE_HASH( 0, 0 );
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ACQUIRE_GROUP_LOCK_SHARED( dwGrpBucket );
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pge = GetGroupEntry(
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GROUP_BUCKET_HEAD( dwGrpBucket ), 0, 0
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);
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if ( pge != NULL )
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{
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ACQUIRE_GROUP_ENTRY_LOCK_SHARED( pge );
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dwSrcBucket = SOURCE_TABLE_HASH( 0, 0 );
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if ( FindSourceEntry(
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SOURCE_BUCKET_HEAD( pge, dwSrcBucket ),
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0, 0, &pse, TRUE ) )
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{
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if ( FindOutInterfaceEntry(
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&pse-> leOutIfList,
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pcac-> dwIfIndex,
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pcac-> dwIfNextHopAddr,
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pcac-> dwProtocolId,
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pcac-> dwComponentId,
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&bNewComp,
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&poie ) )
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{
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//
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// (*, *) membership is present on
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// this interface
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//
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//
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// Pass 2 : Update all MFEs in this
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// bucket as per the results
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// of the CREATION_ALERTs
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//
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AddInterfaceToAllMfeInGroupBucket(
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pcac-> dwIfIndex,
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pcac-> dwIfNextHopAddr,
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pcac-> dwProtocolId,
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pcac-> dwComponentId,
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dwInd,
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pcac-> bIGMP,
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TRUE,
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&leSourceList
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);
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}
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else
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{
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//
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// (*, *) membership is NO longer
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// present on this interface
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//
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dwInd = GROUP_TABLE_SIZE;
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}
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}
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else
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{
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//
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// (*, *) membership is no longer present
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//
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dwInd = GROUP_TABLE_SIZE;
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}
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RELEASE_GROUP_ENTRY_LOCK_SHARED( pge );
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}
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else
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{
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//
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// (*, *) membership is no longer present
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//
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dwInd = GROUP_TABLE_SIZE;
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}
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RELEASE_GROUP_LOCK_SHARED( dwGrpBucket );
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RELEASE_IF_LOCK_SHARED( dwIfBucket );
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}
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FreeList( &leSourceList );
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}
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FreeList( &leSourceList );
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}
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//
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// For wildard sources i.e. (*, G) membership adds
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//
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else if ( IS_WILDCARD_SOURCE(
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pcac-> dwSourceAddr, pcac-> dwSourceMask
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) )
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{
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do
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{
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//
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// Invoke CREATION_ALERTs for all MFEs for the group
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//
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dwErr = InvokeCreationAlertForList(
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&(pcac-> leSourceList),
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pcac-> dwProtocolId,
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pcac-> dwComponentId,
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pcac-> dwIfIndex,
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pcac-> dwIfNextHopAddr
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);
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if ( dwErr != NO_ERROR )
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{
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break;
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}
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|
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//
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// Lock the interface to prevent the (*, G)
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// membership from being deleted while MFEs
|
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// are being updated.
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//
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ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
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bIfLock = TRUE;
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pieEntry = GetIfEntry(
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IF_BUCKET_HEAD( dwIfBucket ),
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pcac-> dwIfIndex,
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pcac-> dwIfNextHopAddr
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);
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if ( pieEntry == NULL )
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{
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//
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// Interface is no longer present with MGM.
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// possibly deleted in another thread.
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// There is no further MFE update to be performed.
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// quit now.
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//
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TRACE2(
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ANY, "InvokeCreationAlert: Interface 0x%x 0x%x"
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" is no longer present",
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pcac-> dwIfIndex,
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pcac-> dwIfNextHopAddr
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);
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break;
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}
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//
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// Verify that the (*, G) membership is still
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// present on the interface
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//
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dwGrpBucket = GROUP_TABLE_HASH(
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pcac-> dwGroupAddr,
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pcac-> dwGroupMask
|
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);
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ACQUIRE_GROUP_LOCK_EXCLUSIVE( dwGrpBucket );
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bGrpLock = TRUE;
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pge = GetGroupEntry(
|
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GROUP_BUCKET_HEAD( dwGrpBucket ),
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pcac-> dwGroupAddr,
|
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pcac-> dwGroupMask
|
|
);
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|
|
if ( pge == NULL )
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{
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|
//
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// Group entry no longer present, possibly
|
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// deleted in some other thread
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//
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|
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TRACE2(
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ANY, "InvokeCreationAlert: Group 0x%x 0x%x "
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"is no longer present",
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pcac-> dwGroupAddr, pcac-> dwGroupMask
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|
);
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break;
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|
}
|
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|
ACQUIRE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
|
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bgeLock = TRUE;
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|
|
dwSrcBucket = SOURCE_TABLE_HASH(
|
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pcac-> dwSourceAddr,
|
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pcac-> dwSourceMask
|
|
);
|
|
|
|
pse = GetSourceEntry(
|
|
SOURCE_BUCKET_HEAD( pge, dwSrcBucket ),
|
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pcac-> dwSourceAddr,
|
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pcac-> dwSourceMask
|
|
);
|
|
|
|
if ( pse == NULL )
|
|
{
|
|
//
|
|
// Source entry no longer present, possibly
|
|
// deleted in some other thread
|
|
//
|
|
|
|
TRACE2(
|
|
ANY, "InvokeCreationAlert: Source 0x%x 0x%x "
|
|
"is no longer present",
|
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pcac-> dwSourceAddr, pcac-> dwSourceMask
|
|
);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
poie = GetOutInterfaceEntry(
|
|
&pse-> leOutIfList,
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr,
|
|
pcac-> dwProtocolId, pcac-> dwComponentId
|
|
);
|
|
|
|
if ( poie == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokeCreationAlert: Interface 0x%x 0x%x "
|
|
"is no longer present in OIF",
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
|
|
);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
//
|
|
// (*, G) present on this interface.
|
|
// Update all for group MFE as per results of
|
|
// creation alerts.
|
|
//
|
|
|
|
AddInterfaceToGroupMfe(
|
|
pge, pcac-> dwIfIndex, pcac-> dwIfNextHopAddr,
|
|
pcac-> dwProtocolId, pcac-> dwComponentId,
|
|
pcac-> bIGMP, TRUE, &(pcac-> leSourceList)
|
|
);
|
|
|
|
} while ( FALSE );
|
|
|
|
|
|
//
|
|
// release locks
|
|
//
|
|
|
|
if ( bgeLock )
|
|
{
|
|
RELEASE_GROUP_ENTRY_LOCK_EXCLUSIVE( pge );
|
|
bgeLock = FALSE;
|
|
}
|
|
|
|
if ( bGrpLock )
|
|
{
|
|
RELEASE_GROUP_LOCK_EXCLUSIVE( dwGrpBucket );
|
|
bgeLock = FALSE;
|
|
}
|
|
|
|
if ( bIfLock )
|
|
{
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
bIfLock = FALSE;
|
|
}
|
|
|
|
FreeList( &(pcac-> leSourceList) );
|
|
}
|
|
|
|
} while ( FALSE );
|
|
|
|
|
|
if ( bIfLock )
|
|
{
|
|
RELEASE_IF_LOCK_SHARED( dwIfBucket );
|
|
}
|
|
|
|
RELEASE_PROTOCOL_LOCK_SHARED();
|
|
|
|
MGM_FREE( pcac );
|
|
|
|
LEAVE_MGM_WORKER();
|
|
|
|
TRACE0( GROUP, "LEAVING WorkerFunctionInvokeCreationAlert" );
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
#if 0
|
|
v()
|
|
{
|
|
//
|
|
// Ensure interface on which join occured is still present
|
|
//
|
|
|
|
dwIfBucket = IF_TABLE_HASH(
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
|
|
);
|
|
|
|
ACQUIRE_IF_LOCK_SHARED( dwIfBucket );
|
|
bIfLock = TRUE;
|
|
|
|
pieEntry = GetIfEntry(
|
|
IF_BUCKET_HEAD( dwIfBucket ),
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
|
|
);
|
|
|
|
if ( pieEntry == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY,
|
|
"InvokeCreationAlert: Could not find interface 0x%x 0x%x",
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
//
|
|
// Ensure that group is still joined on the interface. Since this
|
|
// is being executed asynchronously, it is possible that between
|
|
// the time this work item was queued and the time it gets executed
|
|
// the membership may have been deleted.
|
|
//
|
|
|
|
dwGrpBucket = GROUP_TABLE_HASH(
|
|
pcac-> dwGroupAddr, pcac-> dwGroupMask
|
|
);
|
|
|
|
ACQUIRE_GROUP_LOCK_SHARED( dwGrpBucket );
|
|
bGrpBucket = TRUE;
|
|
|
|
pge = GetGroupEntry(
|
|
GROUP_BUCKET_HEAD( dwGrpBucket ),
|
|
pcac-> dwGroupAddr, pcac-> dwGroupMask
|
|
);
|
|
|
|
if ( pge == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokeCreationAlert: Could not find group 0x%x 0x%x",
|
|
pcac-> dwGroupAddr, pcac-> dwGroupMask
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
ACQUIRE_GROUP_ENTRY_LOCK_SHARED( pge );
|
|
bGrpLock = TRUE;
|
|
|
|
dwSrcBucket = SOURCE_TABLE_HASH(
|
|
pcac-> dwSourceAddr, pcac-> dwSourceMask
|
|
);
|
|
|
|
pse = GetSourceEntry(
|
|
SOURCE_BUCKET_HEAD( pge, dwSrcBucket ),
|
|
pcac-> dwSourceAddr, pcac-> dwSourceMask
|
|
);
|
|
|
|
if ( pse == NULL )
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokeCreationAlert: Could not find source 0x%x "
|
|
"0x%x",
|
|
pcac-> dwSourceAddr, pcac-> dwSourceMask
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
if (GetOutInterfaceEntry(
|
|
&pse-> leOutIfList,
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr,
|
|
pcac-> dwProtocolId, pcac-> dwComponentId
|
|
) == NULL)
|
|
{
|
|
TRACE2(
|
|
ANY, "InvokeCreationAlert: Interface 0x%x 0x%x not "
|
|
"present in OIF list",
|
|
pcac-> dwIfIndex, pcac-> dwIfNextHopAddr
|
|
);
|
|
|
|
break;
|
|
}
|
|
|
|
//
|
|
// release locks
|
|
//
|
|
|
|
RELEASE_GROUP_ENTRY_LOCK_SHARED( pge );
|
|
bGrpLock = FALSE;
|
|
|
|
RELEASE_GROUP_LOCK_SHARED( dwGrpBucket );
|
|
bGrpBucket = FALSE;
|
|
|
|
}
|
|
|
|
#endif
|