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TFTP: send legal timeout value

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Eric Mertens posted bug #3003705: when we made TFTP use the
correct timeout option when sent to the server (fixed May 18th
2010) it became obvious that libcurl used invalid timeout values
(300 by default while the RFC allows nothing above 255). While of
course it is obvious that as TFTP has worked thus far without
being able to set timeout at all, just removing the setting
wouldn't make any difference in behavior. I decided to still keep
it (but fix the problem) as it now actually allows for easier
(future) customization of the timeout.

(http://curl.haxx.se/bug/view.cgi?id=3003705)
This commit is contained in:
Daniel Stenberg 2010-05-21 23:29:52 +02:00
parent 0bb6deda72
commit d17709da31
2 changed files with 15 additions and 2 deletions
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12
CHANGES
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@ -7,11 +7,23 @@
Changelog
Daniel Stenberg (21 May 2010)
- Eric Mertens posted bug #3003705: when we made TFTP use the correct timeout
option when sent to the server (fixed May 18th 2010) it became obvious that
libcurl used invalid timeout values (300 by default while the RFC allows
nothing above 255). While of course it is obvious that as TFTP has worked
thus far without being able to set timeout at all, just removing the setting
wouldn't make any difference in behavior. I decided to still keep it (but
fix the problem) as it now actually allows for easier (future) customization
of the timeout.
(http://curl.haxx.se/bug/view.cgi?id=3003705)
- Douglas Kilpatrick filed bug report #3004787 and pointed out that the TFTP
code didn't handle block id wraps correctly. His suggested fix inspired the
fix I committed.
(http://curl.haxx.se/bug/view.cgi?id=3004787)
Daniel Stenberg (20 May 2010)
- Tanguy Fautre brought a fix to allow curl to build with Microsoft VC10.

5
lib/tftp.c
View File

@ -526,8 +526,9 @@ static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
TFTP_OPTION_BLKSIZE);
sbytes += tftp_option_add(state, sbytes,
(char *)state->spacket.data+sbytes, buf );
/* add timeout option, this is the max time the session may live */
snprintf( buf, sizeof(buf), "%d", state->retry_time*state->retry_max );
/* add timeout option */
snprintf( buf, sizeof(buf), "%d", state->retry_time);
sbytes += tftp_option_add(state, sbytes,
(char *)state->spacket.data+sbytes,
TFTP_OPTION_INTERVAL);