Dear Experts,
I traced that timeout error for different block size during file transfer using
tftp(rrq opcode) is returned from function Mtftp4OnTimerTick() TFTP layer in
UEFI network stack.
Mtftp4OnTimerTick()
//
// Retransmit the packet if haven't reach the maxmium retry count,
// otherwise exit the transfer.
//
if (++Instance->CurRetry < Instance->MaxRetry) {
Mtftp4Retransmit (Instance);
Mtftp4SetTimeout (Instance);
} else {
Mtftp4CleanOperation (Instance, EFI_TIMEOUT); //Timeout is set
continue;
}
Once this is set, It gets populated to downloadfile() function in tftp shellpkg
library.
There seems to be issue(corruption) with tfp client state machine
-Not sending ACK for received data blocks
-Sending duplicate ACK
If server don't receive ACK, It stops sending data packets and timeout occurs
after maximum retry.
Please suggest if this is new or known issue to be fixed?
Regards,
Vabhav
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Vabhav
Sharma
Sent: Thursday, September 28, 2017 5:04 PM
To: siyuan...@intel.com
Cc: edk2-devel@lists.01.org; edk2-devel <edk2-devel-boun...@lists.01.org>
Subject: Re: [edk2] MTFTP file transfer timeout error
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Hello Fu Siyuan,
I see that blocksize option with tftp command is introduced with commit
2be45bfe2779043bc3566e879e7ec279412012dc.
Could you please help me clarify with the timeout error behavior observed in
previous mail
Please note the behavior varies for different file type(Attached sheet)
Regards, Vabhav
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Vabhav
Sharma
Sent: Saturday, September 23, 2017 4:21 PM
To: edk2-devel@lists.01.org; edk2-devel <edk2-devel-boun...@lists.01.org>
Subject: [edk2] MTFTP file transfer timeout error
[This sender failed our fraud detection checks and may not be who they appear
to be. Learn about spoofing at http://aka.ms/LearnAboutSpoofing]
Hi All,
I am facing timeout error with file transfer using tftp on UEFI shell with ARM
based SoCs Command used: tftp -s <blocksize> -i <interface> <server ip>
<filename>
File transfer with file size greater 50 or 60 MB is returning timeout(Also
depends on type of file like data file, ASCII file, boot sector)
I verified by playing around with blocksize from 32K to 42K for different file
size(100MB,200MB,500MB) and identify that increasing the block size for large
file size helps with successful transfer.
File transfer is always successful with 1K blocksize but file transfer time is
increased.
Please suggest if there is any link between block size with file size or anyone
faced such issue? I assume expectation is to use any blocksize from
512(default) to 64K.
Regards,
Vabhav
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