From 010a32d6458bd7e412e002c28e3878b4705e31d4 Mon Sep 17 00:00:00 2001 From: msmith Date: Fri, 15 Oct 1999 05:07:00 +0000 Subject: Implement pseudo_AF_HDRCMPLT, which controls the state of the 'header completion' flag. If set, the interface output routine will assume that the packet already has a valid link-level source address. This defaults to off (the address is overwritten) PR: kern/10680 Submitted by: "Christopher N . Harrell" Obtained from: NetBSD --- sys/net/bpf.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'sys/net/bpf.c') diff --git a/sys/net/bpf.c b/sys/net/bpf.c index 6876ab2..5bd8ed5 100644 --- a/sys/net/bpf.c +++ b/sys/net/bpf.c @@ -579,6 +579,9 @@ bpfwrite(dev, uio, ioflag) if (datlen > ifp->if_mtu) return (EMSGSIZE); + if (d->bd_hdrcmplt) + dst.sa_family = pseudo_AF_HDRCMPLT; + s = splnet(); #if BSD >= 199103 error = (*ifp->if_output)(ifp, m, &dst, (struct rtentry *)0); @@ -626,6 +629,8 @@ reset_d(d) * BIOCGSTATS Get packet stats. * BIOCIMMEDIATE Set immediate mode. * BIOCVERSION Get filter language version. + * BIOCGHDRCMPLT Get "header already complete" flag + * BIOCSHDRCMPLT Set "header already complete" flag */ /* ARGSUSED */ static int @@ -822,6 +827,20 @@ bpfioctl(dev, cmd, addr, flags, p) break; } + /* + * Get "header already complete" flag + */ + case BIOCGHDRCMPLT: + *(u_int *)addr = d->bd_hdrcmplt; + break; + + /* + * Set "header already complete" flag + */ + case BIOCSHDRCMPLT: + d->bd_hdrcmplt = *(u_int *)addr ? 1 : 0; + break; + case FIONBIO: /* Non-blocking I/O */ break; -- cgit v1.1