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/** @file
Implementation of converting an multicast IP address to multicast HW MAC
address.
Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Snp.h"
/**
Call undi to convert an multicast IP address to a MAC address.
@param Snp Pointer to snp driver structure.
@param IPv6 Flag to indicate if this is an ipv6 address.
@param IP Multicast IP address.
@param MAC Pointer to hold the return MAC address.
@retval EFI_SUCCESS The multicast IP address was mapped to the
multicast HW MAC address.
@retval EFI_INVALID_PARAMETER Invalid UNDI command.
@retval EFI_UNSUPPORTED Command is not supported by UNDI.
@retval EFI_DEVICE_ERROR Fail to execute UNDI command.
**/
EFI_STATUS
PxeIp2Mac (
IN SNP_DRIVER *Snp,
IN BOOLEAN IPv6,
IN EFI_IP_ADDRESS *IP,
IN OUT EFI_MAC_ADDRESS *MAC
)
{
PXE_CPB_MCAST_IP_TO_MAC *Cpb;
PXE_DB_MCAST_IP_TO_MAC *Db;
Cpb = Snp->Cpb;
Db = Snp->Db;
Snp->Cdb.OpCode = PXE_OPCODE_MCAST_IP_TO_MAC;
Snp->Cdb.OpFlags = (UINT16) (IPv6 ? PXE_OPFLAGS_MCAST_IPV6_TO_MAC : PXE_OPFLAGS_MCAST_IPV4_TO_MAC);
Snp->Cdb.CPBsize = (UINT16) sizeof (PXE_CPB_MCAST_IP_TO_MAC);
Snp->Cdb.DBsize = (UINT16) sizeof (PXE_DB_MCAST_IP_TO_MAC);
Snp->Cdb.CPBaddr = (UINT64)(UINTN) Cpb;
Snp->Cdb.DBaddr = (UINT64)(UINTN) Db;
Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;
Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;
Snp->Cdb.IFnum = Snp->IfNum;
Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;
CopyMem (&Cpb->IP, IP, sizeof (PXE_IP_ADDR));
//
// Issue UNDI command and check result.
//
DEBUG ((EFI_D_NET, "\nSnp->undi.mcast_ip_to_mac() "));
(*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);
switch (Snp->Cdb.StatCode) {
case PXE_STATCODE_SUCCESS:
break;
case PXE_STATCODE_INVALID_CPB:
return EFI_INVALID_PARAMETER;
case PXE_STATCODE_UNSUPPORTED:
DEBUG (
(EFI_D_NET,
"\nSnp->undi.mcast_ip_to_mac() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
return EFI_UNSUPPORTED;
default:
//
// UNDI command failed. Return EFI_DEVICE_ERROR
// to caller.
//
DEBUG (
(EFI_D_NET,
"\nSnp->undi.mcast_ip_to_mac() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
return EFI_DEVICE_ERROR;
}
CopyMem (MAC, &Db->MAC, sizeof (PXE_MAC_ADDR));
return EFI_SUCCESS;
}
/**
Converts a multicast IP address to a multicast HW MAC address.
This function converts a multicast IP address to a multicast HW MAC address
for all packet transactions. If the mapping is accepted, then EFI_SUCCESS will
be returned.
@param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
@param IPv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460].
Set to FALSE if the multicast IP address is IPv4 [RFC 791].
@param IP The multicast IP address that is to be converted to a multicast
HW MAC address.
@param MAC The multicast HW MAC address that is to be generated from IP.
@retval EFI_SUCCESS The multicast IP address was mapped to the
multicast HW MAC address.
@retval EFI_NOT_STARTED The Simple Network Protocol interface has not
been started by calling Start().
@retval EFI_INVALID_PARAMETER IP is NULL.
@retval EFI_INVALID_PARAMETER MAC is NULL.
@retval EFI_INVALID_PARAMETER IP does not point to a valid IPv4 or IPv6
multicast address.
@retval EFI_DEVICE_ERROR The Simple Network Protocol interface has not
been initialized by calling Initialize().
@retval EFI_UNSUPPORTED IPv6 is TRUE and the implementation does not
support IPv6 multicast to MAC address conversion.
**/
EFI_STATUS
EFIAPI
SnpUndi32McastIpToMac (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN BOOLEAN IPv6,
IN EFI_IP_ADDRESS *IP,
OUT EFI_MAC_ADDRESS *MAC
)
{
SNP_DRIVER *Snp;
EFI_TPL OldTpl;
EFI_STATUS Status;
//
// Get pointer to SNP driver instance for *this.
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
if (IP == NULL || MAC == NULL) {
return EFI_INVALID_PARAMETER;
}
Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
switch (Snp->Mode.State) {
case EfiSimpleNetworkInitialized:
break;
case EfiSimpleNetworkStopped:
Status = EFI_NOT_STARTED;
goto ON_EXIT;
default:
Status = EFI_DEVICE_ERROR;
goto ON_EXIT;
}
Status = PxeIp2Mac (Snp, IPv6, IP, MAC);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
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