osmo-msc - OsmoMSC: Osmocom's Mobile Switching Center for 2G and 3G circuit-switched mobile networks

Age	Commit message (Collapse)	Author	Files	Lines
2013-07-31	nat: Allow to use the prefix lookup to rewrite numbers	Holger Hans Peter Freyther	1	-1/+4
	* Increase the rewritten rule to five digits (this is the easiest for the unit test). This will add another 40kb to the runtime size. * Create a unit test that tests adding and removing the prefix rules. * Use the regexp match to replace from one package
2013-07-31	nat: Introduce a prefix lookup tree (trie) for number rewriting	Holger Hans Peter Freyther	1	-0/+44
	* It is a trie. The max depth of the trie is the length of the longest prefix. The lookup is O(lookuped_prefix), but as the prefix length is limited, the lookup time is constant. * Each node can hold the entire prefix, has place for the rewrite rule with up to three digits. * A trie with 20k entries will take about 3MB ram. * Filling the trie 100 times takes ~800ms on my i7 laptop * 10.000.000 lookups take 315ms.. (for the same prefix). * 93/99 lines are tested, 6/6 functions are tested, 49 of 54 branches are tested. Only memory allocation failures are not covered * A late addition is to handle the '+' sign and to increase the number of chars in the rewrite prefix. The timing/line coverage has not been updated after this change.