Andy, > -----Original Message----- > From: Andy Johnson [mailto:[EMAIL PROTECTED] > Sent: Thursday, January 10, 2008 6:35 AM > To: netdev@vger.kernel.org > Subject: ipip tunnel code (IPV4) > > Hello, > > I am trying to learn the IPV4 ipip tunnel code (net/ipv4/ipip.c) > and I have two little questions about > semantics of variables: > > ipip_fb_tunnel_init - what does "fb" stand for ? > > In tunnels_wc : what does "wc" stand for ?
Similar names occur in net/ipv6/sit.c, which is the IPv6-in-IPv4 analog of ipip.c. I am 90% certain that "wc" stands for "wildcard" - it is used for selecting the default tunnel interface when no other tunnel interfaces match a specific (src, dst) pair. In that light, I assume "fb" stands for something like "fallback" although I am not certain. It would seem to fit though, because the "fallback" tunnel interface is the one that is selected by a "wildcard" match. Would be interested if anyone could confirm or correct my assumptions. Thanks - Fred [EMAIL PROTECTED] > Regards, > Andy > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
