Date: Sun, 31 Aug 2003 23:03:40 -0700 From: Jerry Toung <jtoung@arc.nasa.gov> To: freebsd-hackers@freebsd.org Subject: if_gre, ip_gre and the like (pseudo-interfaces) Message-ID: <200308312303.40555.jtoung@arc.nasa.gov>
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Hello hackers, for another purpose, I am trying to understand the relationship between gre_input and the gre pseudo-device. My understanding is that gre_input is called by IP everytime it receives a packet with a gre headers which after some processing performs IF_ENQUEUE(ifq,m) to put it back on the IPqueue so that higher protocol such TCP can do their thing. :-) I don't see how /dev/gre is ever used on receiving or sending, through if_clone_attach??. Somebody educate me on my missing link. Thank you all, Jerry.help
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