130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/* $NetBSD: ieee8023ad_marker.c,v 1.4 2007/02/22 06:20:16 thorpej Exp $ */
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/*-
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* Copyright (c)2005 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ieee8023ad_marker.c,v 1.4 2007/02/22 06:20:16 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/callout.h>
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#include <sys/mbuf.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#include <net/agr/if_agrvar_impl.h>
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#include <net/agr/ieee8023_slowprotocols.h>
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#include <net/agr/ieee8023_tlv.h>
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#include <net/agr/ieee8023ad.h>
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#include <net/agr/ieee8023ad_marker.h>
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static const struct tlv_template marker_info_tlv_template[] = {
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{ MARKER_TYPE_INFO, 16 },
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{ 0, 0 },
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};
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static const struct tlv_template marker_response_tlv_template[] = {
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{ MARKER_TYPE_RESPONSE, 16 },
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{ 0, 0 },
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};
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int
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ieee8023ad_marker_input(struct ifnet *ifp, struct mbuf *m)
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{
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struct markerdu *mdu;
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struct agr_port *port;
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int error = 0;
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port = ifp->if_agrprivate; /* XXX race with agr_remport. */
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KASSERT(port);
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if (__predict_false(port->port_flags & AGRPORT_DETACHING)) {
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goto bad;
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}
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if (m->m_pkthdr.len != sizeof(*mdu)) {
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goto bad;
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}
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if ((m->m_flags & M_MCAST) == 0) {
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goto bad;
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}
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if (m->m_len < sizeof(*mdu)) {
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m = m_pullup(m, sizeof(*mdu));
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if (m == NULL) {
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return ENOMEM;
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}
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}
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mdu = mtod(m, struct markerdu *);
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if (memcmp(&mdu->mdu_eh.ether_dhost,
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ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
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goto bad;
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}
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KASSERT(mdu->mdu_sph.sph_subtype == SLOWPROTOCOLS_SUBTYPE_MARKER);
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if (mdu->mdu_sph.sph_version != 1) {
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goto bad;
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}
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switch (mdu->mdu_tlv.tlv_type) {
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case MARKER_TYPE_INFO:
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if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
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marker_info_tlv_template, true)) {
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goto bad;
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}
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mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
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memcpy(&mdu->mdu_eh.ether_dhost,
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ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
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memcpy(&mdu->mdu_eh.ether_shost,
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&port->port_origlladdr, ETHER_ADDR_LEN);
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error = agr_xmit_frame(ifp, m);
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break;
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case MARKER_TYPE_RESPONSE:
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if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
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marker_response_tlv_template, true)) {
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goto bad;
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}
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/*
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* we are not interested in responses as
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* we don't have a marker sender.
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*/
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/* FALLTHROUGH */
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default:
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goto bad;
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}
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return error;
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bad:
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m_freem(m);
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return EINVAL;
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}
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