Hi all,
I have some question about the mtftp4 protocol.
When i use the "EFI_MTFTP4_PROTOCOL.GetInfo()" function to get the file
size of server's file.
And server will send a OACK packet to client for file info.
And client should use "EFI_MTFTP4_PROTOCOL.ParseOptions()" to parsing the
OACK packet.
But my mtftp protol send an error packet to server such as following
message before the EFI_MTFTP4_PROTOCOL.ParseOptions.
+++++++++++++++++++++++++++++++++++++++++++++++++
++ Opcode: Error Code (5)
++ Error code: Option negotiation failed (8)
++ Error message: User aborted the transfer
+++++++++++++++++++++++++++++++++++++++++++++++++
And i also trace the mtftp protocol source from
MdeModulePkg\Universal\Network\Mtftp4Dxe.
This error message was send by the Mtftp4RrqInput of Mtftp4Rrq.c file.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++if ((Instance->Token->CheckPacket != NULL) &&
++ ((Opcode == EFI_MTFTP4_OPCODE_OACK) || (Opcode ==
EFI_MTFTP4_OPCODE_ERROR))) {
++ Status = Instance->Token->CheckPacket (
++ &Instance->Mtftp4,
++ Instance->Token,
++ (UINT16) Len,
++ Packet
++ );
======> The status was "EFI_ABORTED"
++ if (EFI_ERROR (Status)) {
++ //
++ // Send an error message to the server to inform it
++ //
++ if (Opcode != EFI_MTFTP4_OPCODE_ERROR) {
++ Mtftp4SendError (
++ Instance,
++ EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,
++ (UINT8 *) "User aborted the transfer"
++ );
++ }
++ ...
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
But i don't know why the "Instance->Token->CheckPacket" send error status
back.
This CheckPacket callback function is represent for what function in the
mtftp4 flow?
According the uefi spec, the "EFI_MTFTP4_PROTOCOL.GetInfo()" function
doesn't meantion any EFI_MTFTP4_TOKEN member, but only in
"EFI_MTFTP4_PROTOCOL.ReadFile()".
Please give some help about this error message.
Thanks
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