Data Storage Methods used?
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From what I have gathered pfsense is reading and writing all data to xml files for permanent storage rather than a database …. what I cant seem to find is code linking to the xml files. For example Firewall_rules_edit.php there are no links to a xml file in the source.
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It uses the CoreGUI framework.
http://devwiki.pfsense.org/CoreGUISteve
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Follow the trail in config.inc and config.lib.inc, you'll find that it's using either xmlparse.inc or xmlreader.inc (both work, there is a choice to use either one).
It's all done seamlessly, if you put data into a $config['foo'] variable and then write_config() it will get into the config. Certain tag names are considered arrays, so a little care is needed but really most developers don't have to know/care about the data storage backend stuff because we're handling all that for them.
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Thanks for the info…
