1/* 2 * Copyright (c) 2001-2003 3 * Fraunhofer Institute for Open Communication Systems (FhG Fokus). 4 * All rights reserved. 5 * 6 * Author: Harti Brandt <harti@freebsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $Begemot: bsnmp/snmp_mibII/mibII.h,v 1.16 2006/02/14 09:04:19 brandt_h Exp $ 30 * 31 * Implementation of the interfaces and IP groups of MIB-II. 32 */ 33#include <sys/param.h> 34#include <sys/sysctl.h> 35#include <sys/socket.h> 36#include <sys/sockio.h> 37#include <sys/syslog.h> 38#include <sys/time.h> 39#include <stdint.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <string.h> 43#include <errno.h> 44#include <unistd.h> 45#include <err.h> 46#include <ctype.h> 47#include <net/if.h> 48#include <net/if_dl.h> 49#include <net/if_mib.h> 50#include <net/route.h> 51#include <netinet/in.h> 52#include <arpa/inet.h> 53 54#include "asn1.h" 55#include "snmp.h" 56#include "snmpmod.h" 57#include "snmp_mibII.h" 58#include "mibII_tree.h" 59 60/* maximum size of interface alias unless overridden with net.ifdescr_maxlen */ 61#define MIBIF_ALIAS_SIZE (64 + 1) 62#define MIBIF_ALIAS_SIZE_MAX 1024 63 64/* 65 * Interface list and flags. 66 */ 67TAILQ_HEAD(mibif_list, mibif); 68enum { 69 MIBIF_FOUND = 0x0001, 70 MIBIF_HIGHSPEED = 0x0002, 71 MIBIF_VERYHIGHSPEED = 0x0004, 72}; 73 74/* 75 * Private mibif data - hang off from the mibif. 76 */ 77struct mibif_private { 78 uint64_t hc_inoctets; 79 uint64_t hc_outoctets; 80 uint64_t hc_omcasts; 81 uint64_t hc_opackets; 82 uint64_t hc_imcasts; 83 uint64_t hc_ipackets; 84}; 85#define MIBIF_PRIV(IFP) ((struct mibif_private *)((IFP)->private)) 86 87/* 88 * Interface addresses. 89 */ 90TAILQ_HEAD(mibifa_list, mibifa); 91enum { 92 MIBIFA_FOUND = 0x0001, 93 MIBIFA_DESTROYED = 0x0002, 94}; 95 96/* 97 * Receive addresses 98 */ 99TAILQ_HEAD(mibrcvaddr_list, mibrcvaddr); 100enum { 101 MIBRCVADDR_FOUND = 0x00010000, 102}; 103 104/* 105 * Interface index mapping. The problem here is, that if the same interface 106 * is reinstantiated (for examble by unloading and loading the hardware driver) 107 * we must use the same index for this interface. For dynamic interfaces 108 * (clip, lane) we must use a fresh index, each time a new interface is created. 109 * To differentiate between these types of interfaces we use the following table 110 * which contains an entry for each dynamic interface type. All other interface 111 * types are supposed to be static. The mibindexmap contains an entry for 112 * all interfaces. The mibif pointer is NULL, if the interface doesn't exist 113 * anymore. 114 */ 115struct mibdynif { 116 SLIST_ENTRY(mibdynif) link; 117 char name[IFNAMSIZ]; 118}; 119SLIST_HEAD(mibdynif_list, mibdynif); 120 121struct mibindexmap { 122 STAILQ_ENTRY(mibindexmap) link; 123 u_short sysindex; 124 u_int ifindex; 125 struct mibif *mibif; /* may be NULL */ 126 char name[IFNAMSIZ]; 127}; 128STAILQ_HEAD(mibindexmap_list, mibindexmap); 129 130/* 131 * Interface stacking. The generic code cannot know how the interfaces stack. 132 * For this reason it instantiates only the x.0 and 0.x table elements. All 133 * others have to be instantiated by the interface specific modules. 134 * The table is read-only. 135 */ 136struct mibifstack { 137 TAILQ_ENTRY(mibifstack) link; 138 struct asn_oid index; 139}; 140TAILQ_HEAD(mibifstack_list, mibifstack); 141 142/* 143 * NetToMediaTable (ArpTable) 144 */ 145struct mibarp { 146 TAILQ_ENTRY(mibarp) link; 147 struct asn_oid index; /* contains both the ifindex and addr */ 148 u_char phys[128]; /* the physical address */ 149 u_int physlen; /* and its length */ 150 u_int flags; 151}; 152TAILQ_HEAD(mibarp_list, mibarp); 153enum { 154 MIBARP_FOUND = 0x00010000, 155 MIBARP_PERM = 0x00000001, 156}; 157 158/* 159 * New if registrations 160 */ 161struct newifreg { 162 TAILQ_ENTRY(newifreg) link; 163 const struct lmodule *mod; 164 int (*func)(struct mibif *); 165}; 166TAILQ_HEAD(newifreg_list, newifreg); 167 168/* list of all IP addresses */ 169extern struct mibifa_list mibifa_list; 170 171/* list of all interfaces */ 172extern struct mibif_list mibif_list; 173 174/* list of dynamic interface names */ 175extern struct mibdynif_list mibdynif_list; 176 177/* list of all interface index mappings */ 178extern struct mibindexmap_list mibindexmap_list; 179 180/* list of all stacking entries */ 181extern struct mibifstack_list mibifstack_list; 182 183/* list of all receive addresses */ 184extern struct mibrcvaddr_list mibrcvaddr_list; 185 186/* list of all NetToMedia entries */ 187extern struct mibarp_list mibarp_list; 188 189/* number of interfaces */ 190extern int32_t mib_if_number; 191 192/* last change of interface table */ 193extern uint64_t mib_iftable_last_change; 194 195/* last change of stack table */ 196extern uint64_t mib_ifstack_last_change; 197 198/* if this is set, one of our lists may be bad. refresh them when idle */ 199extern int mib_iflist_bad; 200 201/* last time refreshed */ 202extern uint64_t mibarpticks; 203 204/* info on system clocks */ 205extern struct clockinfo clockinfo; 206 207/* baud rate of fastest interface */ 208extern uint64_t mibif_maxspeed; 209 210/* user-forced update interval */ 211extern u_int mibif_force_hc_update_interval; 212 213/* current update interval */ 214extern u_int mibif_hc_update_interval; 215 216/* re-compute update interval */ 217void mibif_reset_hc_timer(void); 218 219/* interfaces' data poll interval */ 220extern u_int mibII_poll_ticks; 221 222/* restart the data poll timer */ 223void mibif_restart_mibII_poll_timer(void); 224 225#define MIBII_POLL_TICKS 100 226 227/* get interfaces and interface addresses. */ 228void mib_fetch_interfaces(void); 229 230/* check whether this interface(type) is dynamic */ 231int mib_if_is_dyn(const char *name); 232 233/* destroy an interface address */ 234int mib_destroy_ifa(struct mibifa *); 235 236/* restituate a deleted interface address */ 237void mib_undestroy_ifa(struct mibifa *); 238 239/* change interface address */ 240int mib_modify_ifa(struct mibifa *); 241 242/* undo if address modification */ 243void mib_unmodify_ifa(struct mibifa *); 244 245/* create an interface address */ 246struct mibifa * mib_create_ifa(u_int ifindex, struct in_addr addr, struct in_addr mask, struct in_addr bcast); 247 248/* delete a freshly created address */ 249void mib_uncreate_ifa(struct mibifa *); 250 251/* create/delete arp entries */ 252struct mibarp *mib_arp_create(const struct mibif *, struct in_addr, const u_char *, size_t); 253void mib_arp_delete(struct mibarp *); 254 255/* find arp entry */ 256struct mibarp *mib_find_arp(const struct mibif *, struct in_addr); 257 258/* update arp table */ 259void mib_arp_update(void); 260 261/* fetch routing table */ 262u_char *mib_fetch_rtab(int af, int info, int arg, size_t *lenp); 263 264/* process routing message */ 265void mib_sroute_process(struct rt_msghdr *, struct sockaddr *, 266 struct sockaddr *, struct sockaddr *); 267 268/* send a routing message */ 269void mib_send_rtmsg(struct rt_msghdr *, struct sockaddr *, 270 struct sockaddr *, struct sockaddr *); 271 272/* extract addresses from routing message */ 273void mib_extract_addrs(int, u_char *, struct sockaddr **); 274 275/* fetch routing table */ 276int mib_fetch_route(void); 277