kern/94829: [patch] feature request: adapt OpenBSD's enc0 support for FreeBSD

[Mats Palmgren]

The following reply was made to PR kern/94829; it has been noted by GNATS.

From: Mats Palmgren <mats.palmgren at bredband.net>
To: bug-followup at FreeBSD.org,  vanhu at netasq.com
Cc:  
Subject: Re: kern/94829: [patch] feature request: adapt OpenBSD's enc0 support
 for FreeBSD
Date: Sat, 25 Mar 2006 04:44:14 +0100

 FYI, you can simplify the bpf blocks by using bpf_mtap2.
 
 An example from our enc0 implementation:
 
 		struct ifnet *ifn = get_enc0();
 		if (ifn->if_bpf) {
 			struct enchdr hdr;
 			hdr.af = sav->sah->saidx.dst.sa.sa_family;
 			hdr.spi = sav->spi;
 			hdr.flags = espx ? M_CONF : 0;
 			if (esph)
 				hdr.flags |= M_AUTH;
 			bpf_mtap2(ifn->if_bpf, &hdr, ENC_HDRLEN, m);
                  }