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MdeModulePke/Mtftp4Dxe: Support windowsize in read request operation.

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Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=886

This patch is to support the TFTP windowsize option described in RFC 7440.
The feature allows the client and server to negotiate a window size of
consecutive blocks to send as an alternative for replacing the single-block
lockstep schema.

Currently, the windowsize for write request operation is not supported since
there is no real use cases.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Shao Ming <ming.shao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
This commit is contained in:
Jiaxin Wu
2018-09-14 15:47:20 +08:00
parent 6a147d6dae
commit 6c047cfab1
8 changed files with 89 additions and 37 deletions
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8
MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Support.c
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@ -220,15 +220,15 @@ Mtftp4RemoveBlockNum (
// wrap to zero, because this is the simplest to implement. Here we choose
// this solution.
//
*TotalBlock = Num;
*TotalBlock = Num;
if (Range->Round > 0) {
*TotalBlock += Range->Bound + MultU64x32 ((UINTN) (Range->Round -1), (UINT32) (Range->Bound + 1)) + 1;
}
*TotalBlock += Range->Bound + MultU64x32 ((UINTN) (Range->Round -1), (UINT32) (Range->Bound + 1)) + 1;
}
if (Range->Start > Range->Bound) {
Range->Start = 0;
Range->Round ++;
Range->Round ++;
}
if ((Range->Start > Range->End) || Completed) {