diff options
Diffstat (limited to 'contrib/bsnmp/snmp_mibII/mibII_nettomedia.c')
| -rw-r--r-- | contrib/bsnmp/snmp_mibII/mibII_nettomedia.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/contrib/bsnmp/snmp_mibII/mibII_nettomedia.c b/contrib/bsnmp/snmp_mibII/mibII_nettomedia.c new file mode 100644 index 0000000..e8a7919 --- /dev/null +++ b/contrib/bsnmp/snmp_mibII/mibII_nettomedia.c @@ -0,0 +1,154 @@ +/* + * Copyright (c) 2001-2003 + * Fraunhofer Institute for Open Communication Systems (FhG Fokus). + * All rights reserved. + * + * Author: Harti Brandt <harti@freebsd.org> + * + * Redistribution of this software and documentation and use in source and + * binary forms, with or without modification, are permitted provided that + * the following conditions are met: + * + * 1. Redistributions of source code or documentation must retain the above + * copyright notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY FRAUNHOFER FOKUS + * AND ITS CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * FRAUNHOFER FOKUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $Begemot: bsnmp/snmp_mibII/mibII_nettomedia.c,v 1.6 2003/01/28 13:44:35 hbb Exp $ + * + * Read-only implementation of the Arp table (ipNetToMediaTable) + * + * The problem with the table is, that we don't receive routing message + * when a) an arp table entry is resolved and b) when an arp table entry is + * deleted automatically. Therefor we need to poll the table from time to + * time. + */ +#include "mibII.h" +#include "mibII_oid.h" + +#define ARPREFRESH 30 + +struct mibarp * +mib_find_arp(const struct mibif *ifp, struct in_addr in) +{ + struct mibarp *at; + u_int32_t a = ntohl(in.s_addr); + + if (get_ticks() >= mibarpticks + ARPREFRESH) + mib_arp_update(); + + TAILQ_FOREACH(at, &mibarp_list, link) + if (at->index.subs[0] == ifp->index && + (at->index.subs[1] == ((a >> 24) & 0xff)) && + (at->index.subs[2] == ((a >> 16) & 0xff)) && + (at->index.subs[3] == ((a >> 8) & 0xff)) && + (at->index.subs[4] == ((a >> 0) & 0xff))) + return (at); + return (NULL); +} + +struct mibarp * +mib_arp_create(const struct mibif *ifp, struct in_addr in, const u_char *phys, + size_t physlen) +{ + struct mibarp *at; + u_int32_t a = ntohl(in.s_addr); + + if ((at = malloc(sizeof(*at))) == NULL) + return (NULL); + at->flags = 0; + + at->index.len = 5; + at->index.subs[0] = ifp->index; + at->index.subs[1] = (a >> 24) & 0xff; + at->index.subs[2] = (a >> 16) & 0xff; + at->index.subs[3] = (a >> 8) & 0xff; + at->index.subs[4] = (a >> 0) & 0xff; + if ((at->physlen = physlen) > sizeof(at->phys)) + at->physlen = sizeof(at->phys); + memcpy(at->phys, phys, at->physlen); + + INSERT_OBJECT_OID(at, &mibarp_list); + + return (at); +} + +void +mib_arp_delete(struct mibarp *at) +{ + TAILQ_REMOVE(&mibarp_list, at, link); + free(at); +} + +int +op_nettomedia(struct snmp_context *ctx __unused, struct snmp_value *value, + u_int sub, u_int iidx __unused, enum snmp_op op) +{ + struct mibarp *at; + + at = NULL; /* gcc */ + + if (get_ticks() >= mibarpticks + ARPREFRESH) + mib_arp_update(); + + switch (op) { + + case SNMP_OP_GETNEXT: + if ((at = NEXT_OBJECT_OID(&mibarp_list, &value->var, sub)) == NULL) + return (SNMP_ERR_NOSUCHNAME); + index_append(&value->var, sub, &at->index); + break; + + case SNMP_OP_GET: + if ((at = FIND_OBJECT_OID(&mibarp_list, &value->var, sub)) == NULL) + return (SNMP_ERR_NOSUCHNAME); + break; + + case SNMP_OP_SET: + if ((at = FIND_OBJECT_OID(&mibarp_list, &value->var, sub)) == NULL) + return (SNMP_ERR_NO_CREATION); + return (SNMP_ERR_NOT_WRITEABLE); + + case SNMP_OP_ROLLBACK: + case SNMP_OP_COMMIT: + abort(); + } + + switch (value->var.subs[sub - 1]) { + + case LEAF_ipNetToMediaIfIndex: + value->v.integer = at->index.subs[0]; + break; + + case LEAF_ipNetToMediaPhysAddress: + return (string_get(value, at->phys, at->physlen)); + + case LEAF_ipNetToMediaNetAddress: + value->v.ipaddress[0] = at->index.subs[1]; + value->v.ipaddress[1] = at->index.subs[2]; + value->v.ipaddress[2] = at->index.subs[3]; + value->v.ipaddress[3] = at->index.subs[4]; + break; + + case LEAF_ipNetToMediaType: + value->v.integer = (at->flags & MIBARP_PERM) ? 4 : 3; + break; + } + return (SNMP_ERR_NOERROR); +} |
