Date: Fri, 11 Feb 2011 19:36:00 +1000 From: Da Rock <freebsd-hackers@herveybayaustralia.com.au> To: Julian Elischer <julian@freebsd.org> Cc: freebsd-hackers@freebsd.org, dudu@dudu.ro Subject: Re: linux PF_PACKET compatibility Message-ID: <4D550300.5090000@herveybayaustralia.com.au> In-Reply-To: <4D54F0B0.7010503@freebsd.org> References: <4D54E39D.1000505@herveybayaustralia.com.au> <4D54F0B0.7010503@freebsd.org>
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On 02/11/11 18:17, Julian Elischer wrote: > On 2/10/11 11:22 PM, Da Rock wrote: >> "In recent versions of the Linux kernel (post-2.0 releases) a new >> protocol family has been introduced, named PF_PACKET. This family >> allows an application to send and receive packets dealing directly >> with the network card driver, thus avoiding the usual protocol >> stack-handling (e.g., IP/TCP or IP/UDP processing). That is, any >> packet sent through the socket will be directly passed to the >> Ethernet interface, and any packet received through the interface >> will be directly passed to the application." >> >> I've been chasing the answer to a FreeBSD version of this (approx. >> anyway), but I needed to find out what exactly PF_PACKET was first. >> Finally found this answer here: http://www.linuxjournal.com/article/4659 >> >> I looked up man socket and I can see possibilities (in my mind >> anyway), but I thought I'd be best to check if the gurus here might >> have a better idea. My reason for this is I'm attempting to build >> l2tpns (which supposedly builds on 7.3?! with no trouble), and I'm >> chasing the errors which appear to be linuxisms mostly. >> >> So in man socket simply looking at the list of protocol families I'd >> say network driver level would be similar to PF_LINK link layer >> interface? Is there another man page I should be looking at as well? > > We don't have an exact equivalent.. but we have ways of doing the > same thing. > one way that is suggested is to use pcap and bpf which I am pretty > certain has been enhanced to allow sending as > well as receiving. > you can also hook directly to the interface using netgraph(4) > there are other ways too but those are the two that came to mind > immediately. So I'm going to have to rewrite that interface entirely? Bugger! I just can't fathom how this howto could even exist for l2tpns on FreeBSD if it isn't even close to buildable... weird! http://kuapp.com/2010/07/14/how-to-setup-l2tpipsec-vpn-on-freebsd.html Thanks guys. I'll probably come back with more problems as I slowly crack this one... :) > > >> >> FWIW my gmake output is this: >> >> gcc -Wall -Wformat-security -Wno-format-zero-length -g -O3 -I. >> -I/usr/include -I/usr/local/include -DLIBDIR='"/lib/l2tpns"' >> -DETCDIR='"/etc/l2tpns"' -DSTATISTICS -DSTAT_CALLS -DRINGBUFFER >> -DHAVE_EPOLL -DBGP -c -o arp.o arp.c >> arp.c: In function 'sendarp': >> arp.c:34: error: storage size of 'sll' isn't known >> arp.c:59: error: 'PF_PACKET' undeclared (first use in this function) >> arp.c:59: error: (Each undeclared identifier is reported only once >> arp.c:59: error: for each function it appears in.) >> arp.c:62: error: 'AF_PACKET' undeclared (first use in this function) >> arp.c:34: warning: unused variable 'sll' >> gmake: *** [arp.o] Error 1 >> >> I posted this over at -questions@ but it was suggested to try here >> instead (or -net@). I figured this would be the best place to >> start... :) >> >> Cheers >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to >> "freebsd-hackers-unsubscribe@freebsd.org" >> >
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