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When using hardware decoding, reconstruct the wire form of the ethernet

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header and push it up any attached bpf devices on the parent interface.
This makes hardware vlan decoding more like the normal software path.

Tested by:	cjtt@employees.org
MFC after:	2 weeks
This commit is contained in:
Brooks Davis 2002-02-26 02:19:33 +00:00
parent 546f251b29
commit 7a46ec8f63
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=91272
1 changed files with 20 additions and 0 deletions
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20
sys/net/if_vlan.c
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@ -401,6 +401,26 @@ vlan_input_tag(struct ether_header *eh, struct mbuf *m, u_int16_t t)
{
struct ifvlan *ifv;
/*
* Fake up a header and send the packet to the physical interface's
* bpf tap if active.
*/
if (m->m_pkthdr.rcvif->if_bpf != NULL) {
struct m_hdr mh;
struct ether_vlan_header evh;
bcopy(eh, &evh, 2*ETHER_ADDR_LEN);
evh.evl_encap_proto = htons(ETHERTYPE_VLAN);
evh.evl_tag = htons(t);
evh.evl_proto = eh->ether_type;
/* This kludge is OK; BPF treats the "mbuf" as read-only */
mh.mh_next = m;
mh.mh_data = (char *)&evh;
mh.mh_len = ETHER_HDR_LEN + EVL_ENCAPLEN;
bpf_mtap(m->m_pkthdr.rcvif, (struct mbuf *)&mh);
}
for (ifv = LIST_FIRST(&ifv_list); ifv != NULL;
ifv = LIST_NEXT(ifv, ifv_list)) {
if (m->m_pkthdr.rcvif == ifv->ifv_p