Iwip equivalent

Could anyone help me to find the FreeBSD equivalent for lwip? I'm trying to set up openconnect without root privilege following the guidance from the link http://www.infradead.org/openconnect/nonroot.html. It recommends lwip and SOCKs. I found lwip on FreeBSD requires recompiling of kernel, which I don't really want to do. Also, stackoverflow seems to suggest FreeBSD has its own tools for similar purpose. (http://stackoverflow.com/questions/27522268/how-implement-lwip-on-freebsd)
Thanks for advice.
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