/**
Build and send a ACK packet for the download session.
@param Instance The Mtftp session
@param BlkNo The BlkNo to ack.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory for the packet
@retval EFI_SUCCESS The ACK has been sent
@retval Others Failed to send the ACK.
**/
EFI_STATUS
Mtftp4RrqSendAck (
IN MTFTP4_PROTOCOL *Instance,
IN UINT16 BlkNo
)
{
EFI_MTFTP4_PACKET *Ack;
NET_BUF *Packet;
Packet = NetbufAlloc (sizeof (EFI_MTFTP4_ACK_HEADER));
if (Packet == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Ack = (EFI_MTFTP4_PACKET *) NetbufAllocSpace (
Packet,
sizeof (EFI_MTFTP4_ACK_HEADER),
FALSE
);
ASSERT (Ack != NULL);
Ack->Ack.OpCode = HTONS (EFI_MTFTP4_OPCODE_ACK);
Ack->Ack.Block[0] = HTONS (BlkNo);
return Mtftp4SendPacket (Instance, Packet);
}
/**
Build then send a MTFTP data packet for the MTFTP upload session.
@param Instance The MTFTP upload session.
@param BlockNum The block number to send.
@retval EFI_OUT_OF_RESOURCES Failed to build the packet.
@retval EFI_ABORTED The consumer of this child directs to abort the
transmission by return an error through PacketNeeded.
@retval EFI_SUCCESS The data is sent.
**/
EFI_STATUS
Mtftp4WrqSendBlock (
IN OUT MTFTP4_PROTOCOL *Instance,
IN UINT16 BlockNum
)
{
EFI_MTFTP4_PACKET *Packet;
EFI_MTFTP4_TOKEN *Token;
NET_BUF *UdpPacket;
EFI_STATUS Status;
UINT16 DataLen;
UINT8 *DataBuf;
UINT64 Start;
//
// Allocate a buffer to hold the user data
//
UdpPacket = NetbufAlloc (Instance->BlkSize + MTFTP4_DATA_HEAD_LEN);
if (UdpPacket == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Packet = (EFI_MTFTP4_PACKET *) NetbufAllocSpace (UdpPacket, MTFTP4_DATA_HEAD_LEN, FALSE);
ASSERT (Packet != NULL);
Packet->Data.OpCode = HTONS (EFI_MTFTP4_OPCODE_DATA);
Packet->Data.Block = HTONS (BlockNum);
//
// Read the block from either the buffer or PacketNeeded callback
//
Token = Instance->Token;
DataLen = Instance->BlkSize;
if (Token->Buffer != NULL) {
Start = MultU64x32 (BlockNum - 1, Instance->BlkSize);
if (Token->BufferSize < Start + Instance->BlkSize) {
DataLen = (UINT16) (Token->BufferSize - Start);
Instance->LastBlock = BlockNum;
Mtftp4SetLastBlockNum (&Instance->Blocks, BlockNum);
}
if (DataLen > 0) {
NetbufAllocSpace (UdpPacket, DataLen, FALSE);
CopyMem (Packet->Data.Data, (UINT8 *) Token->Buffer + Start, DataLen);
}
} else {
//
// Get data from PacketNeeded
//
DataBuf = NULL;
Status = Token->PacketNeeded (
&Instance->Mtftp4,
Token,
&DataLen,
(VOID **) &DataBuf
);
if (EFI_ERROR (Status) || (DataLen > Instance->BlkSize)) {
if (DataBuf != NULL) {
FreePool (DataBuf);
}
if (UdpPacket != NULL) {
NetbufFree (UdpPacket);
}
Mtftp4SendError (
Instance,
EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,
(UINT8 *) "User aborted the transfer"
);
return EFI_ABORTED;
}
if (DataLen < Instance->BlkSize) {
Instance->LastBlock = BlockNum;
Mtftp4SetLastBlockNum (&Instance->Blocks, BlockNum);
}
if (DataLen > 0) {
NetbufAllocSpace (UdpPacket, DataLen, FALSE);
CopyMem (Packet->Data.Data, DataBuf, DataLen);
FreePool (DataBuf);
}
}
return Mtftp4SendPacket (Instance, UdpPacket);
}
