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net: tftp: Make sure timeout will not effect wrap offset

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When the block 0 store to the memory of client and timeout at this
moment. Because of no ACK packet, the server will send block 0 again,
if this client reconnect to the server at this time,
TftpBlockWrapOffset will become larger than it should be.

Signed-off-by: Rockly <rocklygnome@gmail.com>
Patch: 264417
This commit is contained in:
rockly 2013-08-03 18:09:05 +08:00 committed by Joe Hershberger
parent c2e5e802ec
commit f754f5dc6f
1 changed files with 1 additions and 1 deletions
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2
net/tftp.c
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@ -281,7 +281,7 @@ static void update_block_number(void)
* number of 0 this means that there was a wrap
* around of the (16 bit) counter.
*/
if (TftpBlock == 0) {
if (TftpBlock == 0 && TftpLastBlock != 0) {
TftpBlockWrap++;
TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
TftpTimeoutCount = 0; /* we've done well, reset thhe timeout */