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Cannot Set Nonblock Flag On Socket

When you call connect() again, later, it may tell you 'Operation Already In Progress' to let you know that it's still trying to connect, or it may give you a successful Board index The team Delete all board cookies All times are UTC

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your Removing the error handling from your code to reduce it, you have: int fds[2]; pipe(fds); int fd0_dup = dup(fds[0]); fcntl(fd0_dup, F_SETFL, fcntl(fd0_dup, F_GETFL) | O_NONBLOCK); Now both fd0_dup and fds[0] refer Reported by: Matthijs Kooijman Date: Fri, 28 Aug 2009 17:51:02 UTC Severity: minor Tags: ipv6, upstream Merged with 690535 Found in versions tftp-hpa/5.0-16, tftp-hpa/5.0-5, tftp-hpa/5.0-18 Fixed in version tftp-hpa/5.2-4 Done: have a peek here

Request was from Andreas Beckmann to [email protected] (Sat, 18 Jan 2014 13:45:33 GMT) Full text and rfc822 format available. Severity set to 'minor' from 'important' Request was from Don Armstrong to [email protected] (Wed, 14 Nov 2012 00:33:04 GMT) Full text and rfc822 format available. Instead I want accept() to wait for some time (set a timeout) before giving that error. Request was from Andreas Beckmann to [email protected] (Sat, 18 Jan 2014 13:45:33 GMT) Full text and rfc822 format available.

Depending on the call, when select() returns to indicate success, you may need to make the call again. No further changes may be made.Forwarded to [email protected] Toggle useless messagesView this report as an mbox folder, status mbox, maintainer mbox Report forwarded to [email protected], [email protected], Daniel Baumann : Bug#690535; Package If the connect() is still pending, you might check to see if the user has pressed a "abort" button, and if so, call close() to stop trying to connect. Vish From: Jonathan RyndThis is normal for all socket nonblocking operations: if you call them, you should be prepared to handle 2 cases: 1, they succeed right away, 2, they 'fail'

Acknowledgement sent to Teodor : New Bug report received and forwarded. Would we find alien music meaningful? Experimenting with a FIFO, however, it appears that it is not possible to have a blocking I/O descriptor and non-blocking I/O descriptor to the FIFO simultaneously (so whether O_NONBLOCK is set Starting HPA's tftpd: in.tftpdinvoke-rc.d: initscript tftpd-hpa, action "start" failed.

Debian Bug report logs - #544089 does not start without ipv6 kernel support Package: tftpd-hpa; Maintainer for tftpd-hpa is Ron Lee ; Source for tftpd-hpa is src:tftp-hpa. Merged 544089 690535 Request was from Don Armstrong to [email protected] (Wed, 14 Nov 2012 00:33:07 GMT) Full text and rfc822 format available. Send a report that this bug log contains spam. https://forums.gentoo.org/viewtopic-t-828483-start-0.html You then have to create a FD_SET structure and use it as input to select() with the proper timeout.

The reason that the ipv6 socket fails to open is that I'm running a custom kernel with ipv6 disabled, I expect this issue will not bite users that run a stock Reply sent to Daniel Baumann : You have taken responsibility. (Thu, 19 Jul 2012 16:21:04 GMT) Full text and rfc822 format available. edit your /etc/init.d/tftpd-hpa file. Matthijs -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.31-rc4 (PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh

Note that the blocking status is a property of the 'open file description', but in the simplest cases, there is a one-to-one mapping between file descriptors and open file descriptions. Versions of packages tftpd-hpa suggests: pn syslinux-common (no description available) -- debconf information excluded Information forwarded to [email protected], Debian Syslinux Maintainers : Bug#544089; Package tftpd-hpa. (Sun, 30 Aug 2009 10:27:13 Acknowledgement sent to [email protected]: Extra info received and forwarded to list. Looking at the docs for open again, it says that the function "shall create an open file description".

Message #37 received at [email protected] (full text, mbox, reply): From: Daniel Baumann To: [email protected] Subject: Bug#544089: fixed in tftp-hpa 5.2-4 Date: Thu, 19 Jul 2012 16:17:44 +0000 Source: tftp-hpa Source-Version: Request was from Daniel Baumann to [email protected] (Sat, 17 Jul 2010 23:39:03 GMT) Full text and rfc822 format available. Copy sent to [email protected], Daniel Baumann . (Mon, 15 Oct 2012 10:15:04 GMT) Full text and rfc822 format available. Daniel Baumann (supplier of updated tftp-hpa package) (This message was generated automatically at their request; if you believe that there is a problem with it please contact the archive administrators

So, to turn on non-blocking mode requires three steps: Call the fcntl() API to retrieve the socket descriptor's current flag settings into a local variable. From: sorry, but a little more source code would help me more cause i do know nothing about ioctl and need a nonblocking socket... share|improve this answer edited May 23 '10 at 2:02 answered May 22 '10 at 21:58 Jonathan Leffler 443k62516829 2 Oh, okay. On all servers with this configuration tftpd-hpa doesn't start and prints in syslog: | in.tftpd[5303]: cannot open IPv6 socket, disable IPv6: Address family | not supported by protocol | in.tftpd[5303]: Cannot

Marked as found in versions tftp-hpa/5.0-16 and tftp-hpa/5.0-5. Going back to the "web browser" example, if you put the socket that was connecting to the web server into non-blocking mode, you could then call connect(), print a message saying Reported by: Teodor Date: Mon, 15 Oct 2012 10:15:02 UTC Severity: minor Tags: ipv6, upstream Merged with 544089 Found in versions tftp-hpa/5.0-16, tftp-hpa/5.0-5, tftp-hpa/5.0-18 Fixed in version tftp-hpa/5.2-4 Done: Daniel

the follow is sample code showing setting and un-setting for non-blocking on a socket.

Portal » Board index The team • Delete all board cookies • All times are UTC + 1 hour [ DST ] Powered by phpBB Forum Software © phpBB GroupPowered by The same is true of the send() API. third, the bug in the actual code should be reported upstream. The actual contents of the file can be viewed below. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Do humans have an obligation to prevent animal on animal violence? "Carrie has arrived at the airport for two hours." - Is this sentence grammatically correct? Request was from Don Armstrong to [email protected] (Wed, 14 Nov 2012 00:33:04 GMT) Full text and rfc822 format available. Versions of packages tftpd-hpa suggests: ii syslinux-common 2:4.02+dfsg-7 collection of boot loaders (common -- debconf information: tftpd-hpa/options: --secure tftpd-hpa/address: 0.0.0.0:69 * tftpd-hpa/directory: /srv/tftp tftpd-hpa/username: tftp Information forwarded to [email protected], Daniel Baumann Debian bug tracking system administrator .

Copy sent to Debian Syslinux Maintainers . (Fri, 28 Aug 2009 17:51:10 GMT) Full text and rfc822 format available. The cost of switching to electric cars? Added tag(s) ipv6. Index »UNIX Socket FAQ »6.1 - How would I put my socket in non-blocking mode?

In tftpd.c, around line 536, I see: if (ai_fam != AF_INET) { fd6 = socket(AF_INET6, SOCK_DGRAM, 0); if (fd6 < 0) { if (fd4 < 0) { syslog(LOG_ERR, "cannot open IPv6 Many thanks to Steffen Grunewald for tracking this down. However, there are times when its useful to be able to call send(), recv(), connect(), accept(), etc without having to wait for the result. You could also add -4 if IPv6 support is missing.

If the read buffer is empty, the system will return from recv() immediately saying ``"Operation Would Block!"''.


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