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make bpf work, by appending ether header before mtap, then discarding it.

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This commit is contained in:
cgd 1995-03-24 14:57:12 +00:00
parent f2619698ac
commit 0d22f2407b
1 changed files with 11 additions and 3 deletions
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14
sys/arch/alpha/tc/if_le.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_le.c,v 1.2 1995/03/08 00:39:04 cgd Exp $ */
/* $NetBSD: if_le.c,v 1.3 1995/03/24 14:57:12 cgd Exp $ */
/*-
* Copyright (c) 1992, 1993
@ -587,7 +587,7 @@ lestart(ifp)
IF_DEQUEUE(&sc->sc_if.if_snd, m);
if (m == 0)
break;
len = leput(sc, LER2_TBUFADDR(sc->sc_r2, bix), m);
#if NBPFILTER > 0
/*
* If bpf is listening on this interface, let it
@ -597,6 +597,7 @@ lestart(ifp)
bpf_mtap(ifp->if_bpf, m);
#endif
len = leput(sc, LER2_TBUFADDR(sc->sc_r2, bix), m);
#ifdef PACKETSTATS
if (len <= LEMTU)
lexpacketsizes[len]++;
@ -824,7 +825,7 @@ leread(sc, buf, len)
(*sc->sc_copyfrombuf)(buf, 0, (char *)&eh, sizeof (eh));
/* adjust input length to account for header and CRC */
len -= sizeof(struct ether_header) - 4;
len -= sizeof(struct ether_header) + 4;
if (len <= 0)
return;
@ -840,8 +841,15 @@ leread(sc, buf, len)
* If so, hand off the raw packet to BPF.
*/
if (ifp->if_bpf) {
M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
if (m == 0)
return;
bcopy(&eh, mtod(m, void *), sizeof(struct ether_header));
bpf_mtap(ifp->if_bpf, m);
m_adj(m, sizeof(struct ether_header));
/*
* Note that the interface cannot be in promiscuous mode if
* there are no BPF listeners. And if we are in promiscuous