| 1 | /* $NetBSD: ieee8023ad_marker.c,v 1.4 2007/02/22 06:20:16 thorpej Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c)2005 YAMAMOTO Takashi, |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: ieee8023ad_marker.c,v 1.4 2007/02/22 06:20:16 thorpej Exp $" ); |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/callout.h> |
| 34 | #include <sys/mbuf.h> |
| 35 | #include <sys/systm.h> |
| 36 | |
| 37 | #include <net/if.h> |
| 38 | #include <net/if_ether.h> |
| 39 | |
| 40 | #include <net/agr/if_agrvar_impl.h> |
| 41 | #include <net/agr/ieee8023_slowprotocols.h> |
| 42 | #include <net/agr/ieee8023_tlv.h> |
| 43 | #include <net/agr/ieee8023ad.h> |
| 44 | #include <net/agr/ieee8023ad_marker.h> |
| 45 | |
| 46 | static const struct tlv_template marker_info_tlv_template[] = { |
| 47 | { MARKER_TYPE_INFO, 16 }, |
| 48 | { 0, 0 }, |
| 49 | }; |
| 50 | |
| 51 | static const struct tlv_template marker_response_tlv_template[] = { |
| 52 | { MARKER_TYPE_RESPONSE, 16 }, |
| 53 | { 0, 0 }, |
| 54 | }; |
| 55 | |
| 56 | int |
| 57 | ieee8023ad_marker_input(struct ifnet *ifp, struct mbuf *m) |
| 58 | { |
| 59 | struct markerdu *mdu; |
| 60 | struct agr_port *port; |
| 61 | int error = 0; |
| 62 | |
| 63 | port = ifp->if_agrprivate; /* XXX race with agr_remport. */ |
| 64 | KASSERT(port); |
| 65 | if (__predict_false(port->port_flags & AGRPORT_DETACHING)) { |
| 66 | goto bad; |
| 67 | } |
| 68 | |
| 69 | if (m->m_pkthdr.len != sizeof(*mdu)) { |
| 70 | goto bad; |
| 71 | } |
| 72 | |
| 73 | if ((m->m_flags & M_MCAST) == 0) { |
| 74 | goto bad; |
| 75 | } |
| 76 | |
| 77 | if (m->m_len < sizeof(*mdu)) { |
| 78 | m = m_pullup(m, sizeof(*mdu)); |
| 79 | if (m == NULL) { |
| 80 | return ENOMEM; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | mdu = mtod(m, struct markerdu *); |
| 85 | |
| 86 | if (memcmp(&mdu->mdu_eh.ether_dhost, |
| 87 | ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { |
| 88 | goto bad; |
| 89 | } |
| 90 | |
| 91 | KASSERT(mdu->mdu_sph.sph_subtype == SLOWPROTOCOLS_SUBTYPE_MARKER); |
| 92 | if (mdu->mdu_sph.sph_version != 1) { |
| 93 | goto bad; |
| 94 | } |
| 95 | |
| 96 | switch (mdu->mdu_tlv.tlv_type) { |
| 97 | case MARKER_TYPE_INFO: |
| 98 | if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, |
| 99 | marker_info_tlv_template, true)) { |
| 100 | goto bad; |
| 101 | } |
| 102 | mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; |
| 103 | memcpy(&mdu->mdu_eh.ether_dhost, |
| 104 | ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); |
| 105 | memcpy(&mdu->mdu_eh.ether_shost, |
| 106 | &port->port_origlladdr, ETHER_ADDR_LEN); |
| 107 | error = agr_xmit_frame(ifp, m); |
| 108 | break; |
| 109 | |
| 110 | case MARKER_TYPE_RESPONSE: |
| 111 | if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, |
| 112 | marker_response_tlv_template, true)) { |
| 113 | goto bad; |
| 114 | } |
| 115 | /* |
| 116 | * we are not interested in responses as |
| 117 | * we don't have a marker sender. |
| 118 | */ |
| 119 | /* FALLTHROUGH */ |
| 120 | default: |
| 121 | goto bad; |
| 122 | } |
| 123 | |
| 124 | return error; |
| 125 | |
| 126 | bad: |
| 127 | m_freem(m); |
| 128 | return EINVAL; |
| 129 | } |
| 130 | |