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Learning Rust: hash map lookup/insert pattern

Fri, 19 May 2017 09:34:20 +0000

In Suricata we’re experimenting with implementing app-layer parser in Rust. See Pierre Chifflier’s presentation at the last SuriCon: [ pdf].

The first experimental parsers will soon land in master.

So coming from a C world I often use a pattern like:

value = hash_lookup(hashtable, key)
if (!value) {
    hash_insert(hashtable, key, somevalue);
}

Playing with Rust and it’s HashMap implementation I wanted to do something very similar. Look up a vector and update it with the new data if it exists, or create a new vector if not:

Major Suricata 1.4 update

Fri, 08 Mar 2013 14:24:32 +0000

Major 1.4 update.

https://suricata.io/2013/03/08/suricata-1-4-1-released/

Suricata 1.4.1 is out

Thu, 13 Dec 2012 16:52:58 +0000

First stable release in the 1.4 branch, right in time for the holidays. Enjoy!

https://suricata.io/2013/03/08/suricata-1-4-1-released/

Hello (security) world!

Mon, 10 Jul 2006 16:01:32 +0000

Welcome to my new blog, Inliniac. I plan to write here often about all kinds of inline related projects and developments. Focus will most likely be on my Vuurmuur project, the Snort_inline project and also ModSecurity. But more general inline and security subjects will be handled if i feel like it.