I guess options CURLOPT_LOW_SPEED_LIMIT & CURLOPT_LOW_SPEED_TIME may
help. Will try out.
Please let me know if you have any other advice. Thanks.

On Tue, Sep 15, 2015 at 6:39 AM, Raghu <raghujindia_at_gmail.com> wrote:
> Hello Experts,
> I'm facing problem in downloading a file via tftp using curl. I'm
> using 7.33.0 version
> and I have patched "#1310 TFTP connection takes CURLOPT_TIMEOUT
> seconds to time out, not CURLOPT_CONNECTTIMEOUT" bug.
> In the write callback routine, I send the received bytes to a remote
> machine and wait maximum of 90secs for the acknowledgement to receive.
> If the ack is received from the remote machine I return the size*nmemb
> bytes for curl to fetch next bytes for transfer. If the ack is not
> received from remote machine I return zero bytes causing curl to abort
> the transfer with curl write error.
> I had set CURLOPT_CONNECTTIMEOUT=10 and have tested below scenarios.
>>.For unreachable tftp ip address, connection timeout happens after 10secs and curl returns return code = 28 Timeout was reached. Looks fine to me.
>>.Initiated the tftp transfer and after few bytes of transfer I shut the remote server link, I do not receive the ack for byte transferred within 90sec and return zero.curl returned code=23.Failed writing received data to disk/application. Looks fine to me.
>>.Initiated the tftp transfer and after few bytes of transfer I shut the tftp server link, curl did not return any error.I think it keeps waiting for data from tftp server. I think curl waits for default CURLOPT_TIMEOUT . Is there any way for me to timeout in the case where tftp link goes down in the middle of transfer and curl returns an error similar to connection timeout. I know CURLOPT_TIMEOUT sets the maximum time for allowing the request to complete.Suppose I set CURLOPT_TIMEOUT to 30secs, and suppose complete transfer takes around 20secs. If tftp link goes down at 10sec and comes back at 25sec,tftp data transfer resumes but due to CURLOPT_TIMEOUT set as 30secs the timeout is reached at 30sec and transfer will be incomplete.
> Can you please help in resolving the above scenario?
>
> --
> Thanks
> Raghu
> SAVE TREES..GO GREEN

-- 
Thanks
Raghu
SAVE TREES..GO GREEN
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