293 lines
5 KiB
C
293 lines
5 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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ifdbase.c
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Abstract:
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Functions to manipulate the interfaces database
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Author:
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Stefan Solomon 04/10/1995
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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#define ifhashindex(IfIndex) (IfIndex) % IF_HASH_TABLE_SIZE
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// THESE FUNCTIONS ASSUME THE ROUTER MANAGER IS IN CRITICAL SECTION WHEN CALLED
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//***
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//
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// Function: InitIfDB
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//
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// Descr:
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//
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//***
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VOID
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InitIfDB(VOID)
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{
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int i;
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PLIST_ENTRY IfHtBucketp;
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IfHtBucketp = IndexIfHt;
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for(i=0; i<IF_HASH_TABLE_SIZE; i++, IfHtBucketp++) {
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InitializeListHead(IfHtBucketp);
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}
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InitializeListHead(&IndexIfList);
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}
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//***
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//
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// Function: AddIfToDB
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//
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// Descr: Inserts a new interface in the Data Base
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// The new if is inserted in the hash table of interface indices
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// and the linked list of interfaces ordered by index
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//
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//***
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VOID
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AddIfToDB(PICB icbp)
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{
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int hv;
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PLIST_ENTRY lep;
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PICB list_icbp;
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// insert in index hash table
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hv = ifhashindex(icbp->InterfaceIndex);
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InsertTailList(&IndexIfHt[hv], &icbp->IndexHtLinkage);
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// insert in the list ordered by index
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lep = IndexIfList.Flink;
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while(lep != &IndexIfList)
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{
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list_icbp = CONTAINING_RECORD(lep, ICB, IndexListLinkage);
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if (list_icbp->InterfaceIndex > icbp->InterfaceIndex) {
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InsertTailList(lep, &icbp->IndexListLinkage);
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return;
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}
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lep = list_icbp->IndexListLinkage.Flink;
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}
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InsertTailList(lep, &icbp->IndexListLinkage);
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}
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//***
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//
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// Function: RemoveIfFromDB
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//
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// Descr: Removes an interface from the interface data base
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//
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//***
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VOID
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RemoveIfFromDB(PICB icbp)
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{
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RemoveEntryList(&icbp->IndexHtLinkage);
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RemoveEntryList(&icbp->IndexListLinkage);
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}
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PICB
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GetInterfaceByIndex(ULONG IfIndex)
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{
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PICB icbp;
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PLIST_ENTRY lep;
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int hv;
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hv = ifhashindex(IfIndex);
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lep = IndexIfHt[hv].Flink;
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while(lep != &IndexIfHt[hv])
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{
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icbp = CONTAINING_RECORD(lep, ICB, IndexHtLinkage);
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if (icbp->InterfaceIndex == IfIndex) {
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return icbp;
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}
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lep = icbp->IndexHtLinkage.Flink;
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}
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return NULL;
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}
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PICB
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GetInterfaceByName(LPWSTR IfName)
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{
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PICB icbp;
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PLIST_ENTRY lep;
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lep = IndexIfList.Flink;
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while(lep != &IndexIfList)
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{
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icbp = CONTAINING_RECORD(lep, ICB, IndexListLinkage);
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if(!_wcsicmp(IfName, icbp->InterfaceNamep)) {
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// found !
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return icbp;
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}
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lep = icbp->IndexListLinkage.Flink;
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}
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return NULL;
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}
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/*++
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Function: GetInterfaceByAdapterName
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Descr: scans the list of interfaces looking for the adapter name
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on dedicated interfaces
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--*/
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PICB
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GetInterfaceByAdapterName(LPWSTR AdapterName)
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{
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PICB icbp;
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PLIST_ENTRY lep;
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lep = IndexIfList.Flink;
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while(lep != &IndexIfList)
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{
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icbp = CONTAINING_RECORD(lep, ICB, IndexListLinkage);
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if(icbp->MIBInterfaceType == IF_TYPE_LAN) {
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if(!_wcsicmp(AdapterName, icbp->AdapterNamep)) {
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// found !
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return icbp;
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}
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}
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lep = icbp->IndexListLinkage.Flink;
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}
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return NULL;
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}
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/*++
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Function: GetInterfaceByAdptNameAndPktType
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Descr: Iterates through all interfaces looking for one that matches the
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given packet type and name.
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[pmay] I added this because some interface bindings weren't taking place
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during pnp because there would be multiple interfaces with the same
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adapter name whose binding depended on the packet type.
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--*/
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PICB
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GetInterfaceByAdptNameAndPktType(LPWSTR AdapterName, DWORD dwType)
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{
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PICB icbp;
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PLIST_ENTRY lep;
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lep = IndexIfList.Flink;
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while(lep != &IndexIfList) {
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icbp = CONTAINING_RECORD(lep, ICB, IndexListLinkage);
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if(icbp->MIBInterfaceType == IF_TYPE_LAN) {
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if((_wcsicmp(AdapterName, icbp->AdapterNamep) == 0) &&
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((icbp->PacketType == AUTO_DETECT_PACKET_TYPE) || (icbp->PacketType == dwType)))
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{
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return icbp;
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}
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}
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lep = icbp->IndexListLinkage.Flink;
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}
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return NULL;
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}
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/*++
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Function: EnumerateFirstInterfaceIndex
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Descr: returns the first interface index, if any
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Note: called with database lock held
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--*/
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DWORD
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EnumerateFirstInterfaceIndex(PULONG InterfaceIndexp)
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{
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PICB icbp;
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if(!IsListEmpty(&IndexIfList)) {
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icbp = CONTAINING_RECORD(IndexIfList.Flink, ICB, IndexListLinkage);
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*InterfaceIndexp = icbp->InterfaceIndex;
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return NO_ERROR;
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}
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else
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{
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return ERROR_NO_MORE_ITEMS;
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}
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}
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/*++
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Function: EnumerateNextInterfaceIndex
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Descr: returns next if index in the database
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Descr: called with database lock held
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--*/
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DWORD
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EnumerateNextInterfaceIndex(PULONG InterfaceIndexp)
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{
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PLIST_ENTRY lep;
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PICB icbp;
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// scan the index if list until we find the next if index
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lep = IndexIfList.Flink;
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while(lep != &IndexIfList)
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{
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icbp = CONTAINING_RECORD(lep, ICB, IndexListLinkage);
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if (icbp->InterfaceIndex > *InterfaceIndexp) {
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*InterfaceIndexp = icbp->InterfaceIndex;
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return NO_ERROR;
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}
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lep = lep->Flink;
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}
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return ERROR_NO_MORE_ITEMS;
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}
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