interface.c File Reference

#include "precomp.h"
#include <ntifs.h>
#include <ipifcons.h>

Include dependency graph for interface.c:

Go to the source code of this file.

Functions
NTSTATUS	GetInterfaceIPv4Address (PIP_INTERFACE Interface, ULONG TargetType, PULONG Address)
UINT	CountInterfaces ()
NTSTATUS	GetInterfaceSpeed (PIP_INTERFACE Interface, PUINT Speed)
NTSTATUS	GetInterfaceName (PIP_INTERFACE Interface, PCHAR NameBuffer, UINT Len)
PIP_INTERFACE	AddrLocateInterface (PIP_ADDRESS MatchAddress)
BOOLEAN	HasPrefix (PIP_ADDRESS Address, PIP_ADDRESS Prefix, UINT Length)
PIP_INTERFACE	GetDefaultInterface (VOID)
PIP_INTERFACE	FindOnLinkInterface (PIP_ADDRESS Address)
VOID	GetInterfaceConnectionStatus (PIP_INTERFACE Interface, PULONG Result)

Variables
ULONG	NextDefaultAdapter = 0

Function Documentation

AddrLocateInterface()

PIP_INTERFACE AddrLocateInterface

(

PIP_ADDRESS

MatchAddress

)

Definition at line 89 of file interface.c.

{
    KIRQL OldIrql;
    PIP_INTERFACE RetIF = NULL;
    IF_LIST_ITER(CurrentIF);
 
    TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
 
    ForEachInterface(CurrentIF) {
    if( AddrIsEqual( &CurrentIF->Unicast, MatchAddress ) ||
            AddrIsEqual( &CurrentIF->Broadcast, MatchAddress ) ) {
            RetIF = CurrentIF;
            break;
    }
    } EndFor(CurrentIF);
 
    TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
    return RetIF;
}

Referenced by DispTdiQueryIpHwAddress(), and FileOpenAddress().

CountInterfaces()

UINT CountInterfaces

(

)

Definition at line 46 of file interface.c.

                       {
    ULONG Count = 0;
    KIRQL OldIrql;
    IF_LIST_ITER(CurrentIF);
 
    TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
 
    ForEachInterface(CurrentIF) {
    Count++;
    } EndFor(CurrentIF);
 
    TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
    return Count;
}

Referenced by InfoTdiQueryGetIPSnmpInfo().

FindOnLinkInterface()

PIP_INTERFACE FindOnLinkInterface

(

PIP_ADDRESS

Address

)

Definition at line 221 of file interface.c.

{
    KIRQL OldIrql;
    IF_LIST_ITER(CurrentIF);
 
    TI_DbgPrint(DEBUG_ROUTER, ("Called. Address (0x%X)\n", Address));
    TI_DbgPrint(DEBUG_ROUTER, ("Address (%s)\n", A2S(Address)));
 
    if (AddrIsUnspecified(Address))
        return GetDefaultInterface();
 
    TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
 
    ForEachInterface(CurrentIF) {
        if (HasPrefix(Address, &CurrentIF->Unicast,
              AddrCountPrefixBits(&CurrentIF->Netmask))) {
        TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
            return CurrentIF;
    }
    } EndFor(CurrentIF);
 
    TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
    return NULL;
}

Referenced by RouteGetRouteToDestination().

GetDefaultInterface()

PIP_INTERFACE GetDefaultInterface

(

VOID

)

Definition at line 156 of file interface.c.

{
   KIRQL OldIrql;
   ULONG Index = 0;
   ULONG IfStatus;
 
   IF_LIST_ITER(CurrentIF);
 
   TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
   /* DHCP hack: Always return the adapter without an IP address */
   ForEachInterface(CurrentIF) {
      if (CurrentIF->Context && AddrIsUnspecified(&CurrentIF->Unicast)) {
          TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
          GetInterfaceConnectionStatus(CurrentIF, &IfStatus);
          if (IfStatus == MIB_IF_OPER_STATUS_OPERATIONAL) {
              return CurrentIF;
          }
 
          TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
      }
   } EndFor(CurrentIF);
 
   /* Try to continue from the next adapter */
   ForEachInterface(CurrentIF) {
      if (CurrentIF->Context && (Index++ == NextDefaultAdapter)) {
          TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
          GetInterfaceConnectionStatus(CurrentIF, &IfStatus);
          if (IfStatus == MIB_IF_OPER_STATUS_OPERATIONAL) {
              NextDefaultAdapter++;
              return CurrentIF;
          }
 
          TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
      }
   } EndFor(CurrentIF);
 
   /* No luck, so we'll choose the first adapter this time */
   Index = 0;
   ForEachInterface(CurrentIF) {
      if (CurrentIF->Context) {
          Index++;
          TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
          GetInterfaceConnectionStatus(CurrentIF, &IfStatus);
          if (IfStatus == MIB_IF_OPER_STATUS_OPERATIONAL) {
              NextDefaultAdapter = Index;
              return CurrentIF;
          }
 
          TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
      }
   } EndFor(CurrentIF);
 
   /* Even that didn't work, so we'll just go with loopback */
   NextDefaultAdapter = 0;
   TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
 
   /* There are no physical interfaces on the system
    * so we must pick the loopback interface */
 
   return Loopback;
}

Referenced by DispTdiQueryIpHwAddress(), FindOnLinkInterface(), and NBLocateNeighbor().

GetInterfaceConnectionStatus()

VOID GetInterfaceConnectionStatus	(	PIP_INTERFACE	Interface,
		PULONG	Result
	)

Definition at line 254 of file interface.c.

{
    PLAN_ADAPTER Adapter = Interface->Context;
 
    /* Loopback has no adapter context */
    if (Adapter == NULL || Adapter->State == LAN_STATE_STARTED) {
        *Result = MIB_IF_OPER_STATUS_OPERATIONAL;
    }
    else {
        *Result = MIB_IF_OPER_STATUS_DISCONNECTED;
    }
}

Referenced by GetDefaultInterface(), InfoTdiQueryGetInterfaceMIB(), and TCPUpdateInterfaceLinkStatus().

GetInterfaceIPv4Address()

NTSTATUS GetInterfaceIPv4Address	(	PIP_INTERFACE	Interface,
		ULONG	TargetType,
		PULONG	Address
	)

Definition at line 19 of file interface.c.

                                   {
    switch( TargetType ) {
    case ADE_UNICAST:
    *Address = Interface->Unicast.Address.IPv4Address;
    break;
 
    case ADE_ADDRMASK:
    *Address = Interface->Netmask.Address.IPv4Address;
    break;
 
    case ADE_BROADCAST:
    *Address = Interface->Broadcast.Address.IPv4Address;
    break;
 
    case ADE_POINTOPOINT:
    *Address = Interface->PointToPoint.Address.IPv4Address;
    break;
 
    default:
    return STATUS_UNSUCCESSFUL;
    }
 
    return STATUS_SUCCESS;
}

Referenced by InfoTdiQueryGetAddrTable(), and TCPUpdateInterfaceIPInformation().

GetInterfaceName()

NTSTATUS GetInterfaceName	(	PIP_INTERFACE	Interface,
		PCHAR	NameBuffer,
		UINT	Len
	)

Definition at line 70 of file interface.c.

                          {
    ULONG ResultSize = 0;
    NTSTATUS Status =
    RtlUnicodeToMultiByteN( NameBuffer,
                Len,
                &ResultSize,
                Interface->Name.Buffer,
                Interface->Name.Length );
 
    if( NT_SUCCESS(Status) )
    NameBuffer[ResultSize] = 0;
    else
    NameBuffer[0] = 0;
 
    return Status;
}

GetInterfaceSpeed()

NTSTATUS GetInterfaceSpeed	(	PIP_INTERFACE	Interface,
		PUINT	Speed
	)

Definition at line 62 of file interface.c.

                                                                   {
    PLAN_ADAPTER IF = (PLAN_ADAPTER)Interface->Context;
 
    *Speed = IF->Speed;
 
    return STATUS_SUCCESS;
}

Referenced by InfoTdiQueryGetInterfaceMIB().

HasPrefix()

BOOLEAN HasPrefix	(	PIP_ADDRESS	Address,
		PIP_ADDRESS	Prefix,
		UINT	Length
	)

Definition at line 111 of file interface.c.

{
    PUCHAR pAddress = (PUCHAR)&Address->Address;
    PUCHAR pPrefix  = (PUCHAR)&Prefix->Address;
 
    TI_DbgPrint(DEBUG_ROUTER, ("Called. Address (0x%X)  Prefix (0x%X)  Length (%d).\n", Address, Prefix, Length));
 
#if 0
    TI_DbgPrint(DEBUG_ROUTER, ("Address (%s)  Prefix (%s).\n",
        A2S(Address), A2S(Prefix)));
#endif
 
    /* Don't report matches for empty prefixes */
    if (Length == 0) {
        return FALSE;
    }
 
    /* Check that initial integral bytes match */
    while (Length > 8) {
        if (*pAddress++ != *pPrefix++)
            return FALSE;
        Length -= 8;
    }
 
    /* Check any remaining bits */
    if ((Length > 0) && ((*pAddress >> (8 - Length)) != (*pPrefix >> (8 - Length))))
        return FALSE;
 
    return TRUE;
}

Referenced by FindOnLinkInterface().

Variable Documentation

NextDefaultAdapter

ULONG NextDefaultAdapter = 0

Definition at line 17 of file interface.c.

Referenced by GetDefaultInterface().