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net: tftp: Fix incorrect tftp_next_ack on no OACK

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When the tftp server did not send any OACK, the tftp_next_ack variable
was not set to the correct value . As the server was transmitting
blocks we generated a lot of 'Received unexpected block: $n, expected
$n+1' error messages. Depending on the timeout setting the transfer
could still complete though.

Signed-off-by: Harm Berntsen <harm.berntsen@nedap.com>
CC: Ramon Fried <rfried.dev@gmail.com>
Reviewed-By: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Harm Berntsen 2020-11-27 21:45:56 +00:00 committed by Tom Rini
parent 51723c5581
commit beb61e13b8
1 changed files with 3 additions and 1 deletions
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4
net/tftp.c
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@ -630,8 +630,10 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
tftp_cur_block++;
tftp_cur_block %= TFTP_SEQUENCE_SIZE;
if (tftp_state == STATE_SEND_RRQ)
if (tftp_state == STATE_SEND_RRQ) {
debug("Server did not acknowledge any options!\n");
tftp_next_ack = tftp_windowsize;
}
if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
tftp_state == STATE_RECV_WRQ) {