Iperf Error Bind Failed Address Already In Use
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Support Networking & Wireless [SOLVED] cvsd: bind() failed: Address already in use Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 4 of 4 Thread: cvsd: bind() failed: Address already in use Thread Tools Show address already in use socket Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode January 28th, 2010 #1 pullmoll View Profile View Forum Posts Private Message 5 Cups of Ubuntu Join Date Nov 2009 Location Germany Beans 21 DistroUbuntu 9.10 Karmic Koala cvsd: bind() failed: Address already in use I wanted to run cvsd on my Ubuntu 9.10 64bit installation. All I get is the error message from the subject, regardless which port I configure in /etc/cvsd/cvsd.conf. And of course the port is not in use before I try to /etc/init.d/cvsd start. Any ideas? DUH! Searching helps Last edited by pullmoll; January 28th, 2010 at 10:33 AM. Adv Reply March 12th, 2010 #2 scarf View Profile View Forum Posts Private Message Gee! These Aren't Roasted! Join Date Nov 2008 Beans 158 Re: cvsd: bind() failed: Address already in use what were your findings? i am getting a similar error with bootp: bootpd: error(3): bind: Address already in use Adv Re
and both ends must ACK (acknowledge) each other's FIN packets. The FIN packets are initiated by the application
Address Already In Use Python
performing a close(), a shutdown(), or an exit(). The ACKs are handled
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by the kernel after the close() has completed. Because of this, it is possible for the process to iperf bind failed address already in use windows complete before the kernel has released the associated network resource, and this port cannot be bound to another process until the kernel has decided that it is done. Figure https://ubuntuforums.org/showthread.php?t=1392454 1 Figure 1 shows all of the possible states that can occur during a normal closure, depending on the order in which things happen. Note that if you initiate closure, there is a TIME_WAIT state that is absent from the other side. This TIME_WAIT is necessary in case the ACK you sent wasn't received, or in case spurious packets http://hea-www.harvard.edu/~fine/Tech/addrinuse.html show up for other reasons. I'm really not sure why this state isn't necessary on the other side, when the remote end initiates closure, but this is definitely the case. TIME_WAIT is the state that typically ties up the port for several minutes after the process has completed. The length of the associated timeout varies on different operating systems, and may be dynamic on some operating systems, however typical values are in the range of one to four minutes. If both ends send a FIN before either end receives it, both ends will have to go through TIME_WAIT. Normal Closure of Listen Sockets A socket which is listening for connections can be closed immediately if there are no connections pending, and the state proceeds directly to CLOSED. If connections are pending however, FIN_WAIT_1 is entered, and a TIME_WAIT is inevitable. Note that it is impossible to completely guarantee a clean closure here. While you can check the connections using a select() call before closure, a tiny but real possibility exists that a connection could arrive a
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow http://unix.stackexchange.com/questions/121230/nc-bind-failed-address-already-in-use the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and address already rise to the top nc: bind failed: Address already in use up vote 4 down vote favorite 1 I am trying to execute nc command from a script , my script is executing nc command on different ports of Destination using the same source port. e.g: nc -p 8140 -z -v -n 10.X.X.9 9090 nc -p 8140 -z -v -n 10.X.X.9 9091 nc -p 8140 -z -v -n 10.X.X.9 9092 nc -p 8140 -z address already in -v -n 10.X.X.9 9093 and so on ... After the 1st nc execution , for the remaining of all the lines I am getting below mentioned error message. nc: bind failed: Address already in use nc: bind failed: Address already in use nc: bind failed: Address already in use Is there any way of avoiding this situation? networking tcp netcat share|improve this question edited Dec 9 '14 at 14:48 Eric Leschinski 6991615 asked Mar 24 '14 at 21:27 saurav 1641211 add a comment| 2 Answers 2 active oldest votes up vote 7 down vote accepted Background When you're attempting to use nc in this manner it's continuing to keep the TCP port open, waiting for the destination to acknowledge the receiving of the done request. This is highlighted in the TCP article on Wikipedia. TIME-WAIT (either server or client) represents waiting for enough time to pass to be sure the remote TCP received the acknowledgment of its connection termination request. [According to RFC 793 a connection can stay in TIME-WAIT for a maximum of four minutes known as a MSL (maximum segment lifetime).] You can see the effects of this when I use nc similarly: $ nc -p 8140 -v -n 192.168.1.105 80 Looking at the state of port 8140: $ netstat -anpt | grep 8140 tcp 0 0 192.1