November 2023 - ris-users - mailman.ripe.net

Re: ris-users Digest, Vol 50, Issue 3
by Rob Ballantyne 29 Nov '23

29 Nov '23

Thanks Colin, I tried today, unsuccessfully unfortunately, to get a small example to fail in the way my stuff was failing. If I can prove out a bug, I’ll definitely create Github issue. Thanks for the help! Rob > > ------------------------------ > > Message: 2 > Date: Tue, 28 Nov 2023 11:43:00 +0100 > From: Colin Petrie <colin(a)spakka.net> > To: Rob Ballantyne <robballantyne3(a)gmail.com> > Cc: ris-users(a)ripe.net > Subject: Re: Restrictions around freeing memory with > bgpdump_free_memory > Message-ID: <2c44746b4c0a70be113a36080fd01539(a)spakka.net> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Hi Rob, > > bgpdump versions before 1.5.0 had thread-safety issues due to use of > global variables. If you are still having issues with the latest > version, please open an issue on Github so we can look into the problem. > > Thanks, > Colin > >

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Restrictions around freeing memory with bgpdump_free_memory
by Rob Ballantyne 28 Nov '23

28 Nov '23

Hi, I’m running into memory access exceptions when using bgpdump_free_memory(). I’m collecting an interval worth of BGPDUMP_ENTRYs (1 minute worth) into buckets. After I have a bucket full I do a pairwise computation (that can take some time) of just this buckets data on a thread (from a pool) while the main thread moves onto the second bucket (and then starts up potentially another thread on the second bucket). … After the thread completes its summary statistics computation, it goes to call bgpdump_free_memory() on each of the BGPDUMP_ENTRY. I mutex lock so that only on thread will execute in bgpdump_free_memory() at a time. Are there restrictions (express or implied) on how to call bgpdump_free_memory() whether multi-threaded or not? BTW, if I run just a single thread it does seem to work just fine. Thanks, Rob

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Two years of selective peering with RIS
by Michela Galante 23 Nov '23

23 Nov '23

Dear colleagues, We published an article on RIPE Labs where we talk about our RIS peering strategy of the last two years, what we've achieved so far, and why we've temporarily removed the peering form from our website: https://labs.ripe.net/author/emileaben/two-years-of-selective-peering-with-… We would love to hear your thoughts about it either here on this mailing list, in the Forum or live at RIPE 87. Best regards, Michela Galante RIPE NCC

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Using libbgpdump - obtain aspath?
by Rob Ballantyne 07 Nov '23

07 Nov '23

Hello All, I’ve just started looking at libbgpdump for a project where I will be parsing MRT/BGP data. I’ve managed, following the example/advice I’ve seen, to get a basic loop running through an update file from the repository working. However, I don’t seem to be able to find the ASPATH component in the parsed data structure. I can see the type/subtype of the data block is BGPDUMP_TYPE_ZEBRA_BGP/BGPDUMP_SUBTYPE_ZEBRA_BGP_MESSAGE. I can also see that the BGPDUMP_BODY is a discriminated union based on these values. I can see that BGPDUMP_ENTRY.attr should probably contain an ASPATH but it doesn’t seem to be set ever. Should I be expecting the ASPATH to be set in this case? Should I be doing something different (calling some init function after discovering the BGPDUMP_BODY is of the right type?). Thanks! Rob

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