Date: Mon, 30 May 2016 11:13:30 +0200 From: Eduardo Morras <emorrasg@yahoo.es> To: freebsd-questions@freebsd.org Subject: Re: Possible bug with SCTP and iperf3? Message-ID: <20160530111330.67b480d76093966b634e3a54@yahoo.es> In-Reply-To: <CAN5odxAZ_VEL=wNLbb=aTv1LiHkPaGA2jrgam=Qe6DDPPB=XiA@mail.gmail.com> References: <CAN5odxAZ_VEL=wNLbb=aTv1LiHkPaGA2jrgam=Qe6DDPPB=XiA@mail.gmail.com>
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On Sun, 29 May 2016 14:45:14 -0400 Manas Bhatnagar <b.manas.88@gmail.com> wrote: > Hello, > > I experienced a hard reset of a system recently, running FreeBSD > 10-RELEASE, while running iperf3. I do not know much about SCTP nor > iperf3, I was just fiddling around with iperf3 arguments. These are > the commands I ran: > > iperf3 -c $IP -P 32 -t 60 > iperf3 -u -c $IP -P 32 -t 60 > iperf3 --sctp -c $IP -P 32 -t 60 > iperf3 --sctp -c $IP -P 4 -t 60 > iperf3 --sctp -c $IP -t 60 > iperf3 --sctp --nstreams 64 -c $IP -P 32 -t 60 > iperf3 --sctp --nstreams 2 -c $IP -P 32 -t 60 > > What I remember is that the second last command would not show any > data as being transferred and when I ran the last command, the system > running the iperf3 server did a hard reset. How do you run the server? Had you a log file? Did you run it as root? Try: %iperf3 -s -D -V --logfile filename Can you run the last 2 with -V -R --get-server-output --logfile filename? %iperf3 --sctp --nstreams 2 -c $IP -P 32 -t 60 -V -R --get-server-output filename Didn't -P for tcp/udp connections only for emulate sctp multistream capability? AFAIK you don't need both. > I don't know if this is a bug or not but it seems to my inexperienced > eyes like it is something that could be used maliciously to bring down > a system running 'iperf3 -s' and so I thought it would be best to > share this with the mailing list. Thanks to you. > Thank you, > Manas --- --- Eduardo Morras <emorrasg@yahoo.es>
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