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 <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <errno.h> 43 #include <unistd.h> 44 #include <err.h> 45 #include <ctype.h> 46 #include <net/if.h> 47 #include <net/if_dl.h> 48 #include <net/if_mib.h> 49 #include <net/route.h> 50 #include <netinet/in.h> 51 #include <arpa/inet.h> 52 53 #include "asn1.h" 54 #include "snmp.h" 55 #include "snmpmod.h" 56 #include "snmp_mibII.h" 57 #include "mibII_tree.h" 58 59 /* 60 * Interface list and flags. 61 */ 62 TAILQ_HEAD(mibif_list, mibif); 63 enum { 64 MIBIF_FOUND = 0x0001, 65 MIBIF_HIGHSPEED = 0x0002, 66 MIBIF_VERYHIGHSPEED = 0x0004, 67 }; 68 69 /* 70 * Private mibif data - hang off from the mibif. 71 */ 72 struct mibif_private { 73 uint64_t hc_inoctets; 74 uint64_t hc_outoctets; 75 uint64_t hc_omcasts; 76 uint64_t hc_opackets; 77 uint64_t hc_imcasts; 78 uint64_t hc_ipackets; 79 }; 80 #define MIBIF_PRIV(IFP) ((struct mibif_private *)((IFP)->private)) 81 82 /* 83 * Interface addresses. 84 */ 85 TAILQ_HEAD(mibifa_list, mibifa); 86 enum { 87 MIBIFA_FOUND = 0x0001, 88 MIBIFA_DESTROYED = 0x0002, 89 }; 90 91 /* 92 * Receive addresses 93 */ 94 TAILQ_HEAD(mibrcvaddr_list, mibrcvaddr); 95 enum { 96 MIBRCVADDR_FOUND = 0x00010000, 97 }; 98 99 /* 100 * Interface index mapping. The problem here is, that if the same interface 101 * is reinstantiated (for examble by unloading and loading the hardware driver) 102 * we must use the same index for this interface. For dynamic interfaces 103 * (clip, lane) we must use a fresh index, each time a new interface is created. 104 * To differentiate between these types of interfaces we use the following table 105 * which contains an entry for each dynamic interface type. All other interface 106 * types are supposed to be static. The mibindexmap contains an entry for 107 * all interfaces. The mibif pointer is NULL, if the interface doesn't exist 108 * anymore. 109 */ 110 struct mibdynif { 111 SLIST_ENTRY(mibdynif) link; 112 char name[IFNAMSIZ]; 113 }; 114 SLIST_HEAD(mibdynif_list, mibdynif); 115 116 struct mibindexmap { 117 STAILQ_ENTRY(mibindexmap) link; 118 u_short sysindex; 119 u_int ifindex; 120 struct mibif *mibif; /* may be NULL */ 121 char name[IFNAMSIZ]; 122 }; 123 STAILQ_HEAD(mibindexmap_list, mibindexmap); 124 125 /* 126 * Interface stacking. The generic code cannot know how the interfaces stack. 127 * For this reason it instantiates only the x.0 and 0.x table elements. All 128 * others have to be instantiated by the interface specific modules. 129 * The table is read-only. 130 */ 131 struct mibifstack { 132 TAILQ_ENTRY(mibifstack) link; 133 struct asn_oid index; 134 }; 135 TAILQ_HEAD(mibifstack_list, mibifstack); 136 137 /* 138 * NetToMediaTable (ArpTable) 139 */ 140 struct mibarp { 141 TAILQ_ENTRY(mibarp) link; 142 struct asn_oid index; /* contains both the ifindex and addr */ 143 u_char phys[128]; /* the physical address */ 144 u_int physlen; /* and its length */ 145 u_int flags; 146 }; 147 TAILQ_HEAD(mibarp_list, mibarp); 148 enum { 149 MIBARP_FOUND = 0x00010000, 150 MIBARP_PERM = 0x00000001, 151 }; 152 153 /* 154 * New if registrations 155 */ 156 struct newifreg { 157 TAILQ_ENTRY(newifreg) link; 158 const struct lmodule *mod; 159 int (*func)(struct mibif *); 160 }; 161 TAILQ_HEAD(newifreg_list, newifreg); 162 163 /* list of all IP addresses */ 164 extern struct mibifa_list mibifa_list; 165 166 /* list of all interfaces */ 167 extern struct mibif_list mibif_list; 168 169 /* list of dynamic interface names */ 170 extern struct mibdynif_list mibdynif_list; 171 172 /* list of all interface index mappings */ 173 extern struct mibindexmap_list mibindexmap_list; 174 175 /* list of all stacking entries */ 176 extern struct mibifstack_list mibifstack_list; 177 178 /* list of all receive addresses */ 179 extern struct mibrcvaddr_list mibrcvaddr_list; 180 181 /* list of all NetToMedia entries */ 182 extern struct mibarp_list mibarp_list; 183 184 /* number of interfaces */ 185 extern int32_t mib_if_number; 186 187 /* last change of interface table */ 188 extern uint64_t mib_iftable_last_change; 189 190 /* last change of stack table */ 191 extern uint64_t mib_ifstack_last_change; 192 193 /* if this is set, one of our lists may be bad. refresh them when idle */ 194 extern int mib_iflist_bad; 195 196 /* last time refreshed */ 197 extern uint64_t mibarpticks; 198 199 /* info on system clocks */ 200 extern struct clockinfo clockinfo; 201 202 /* baud rate of fastest interface */ 203 extern uint64_t mibif_maxspeed; 204 205 /* user-forced update interval */ 206 extern u_int mibif_force_hc_update_interval; 207 208 /* current update interval */ 209 extern u_int mibif_hc_update_interval; 210 211 /* re-compute update interval */ 212 void mibif_reset_hc_timer(void); 213 214 /* interfaces' data poll interval */ 215 extern u_int mibII_poll_ticks; 216 217 /* restart the data poll timer */ 218 void mibif_restart_mibII_poll_timer(void); 219 220 #define MIBII_POLL_TICKS 100 221 222 /* get interfaces and interface addresses. */ 223 void mib_fetch_interfaces(void); 224 225 /* check whether this interface(type) is dynamic */ 226 int mib_if_is_dyn(const char *name); 227 228 /* destroy an interface address */ 229 int mib_destroy_ifa(struct mibifa *); 230 231 /* restituate a deleted interface address */ 232 void mib_undestroy_ifa(struct mibifa *); 233 234 /* change interface address */ 235 int mib_modify_ifa(struct mibifa *); 236 237 /* undo if address modification */ 238 void mib_unmodify_ifa(struct mibifa *); 239 240 /* create an interface address */ 241 struct mibifa * mib_create_ifa(u_int ifindex, struct in_addr addr, struct in_addr mask, struct in_addr bcast); 242 243 /* delete a freshly created address */ 244 void mib_uncreate_ifa(struct mibifa *); 245 246 /* create/delete arp entries */ 247 struct mibarp *mib_arp_create(const struct mibif *, struct in_addr, const u_char *, size_t); 248 void mib_arp_delete(struct mibarp *); 249 250 /* find arp entry */ 251 struct mibarp *mib_find_arp(const struct mibif *, struct in_addr); 252 253 /* update arp table */ 254 void mib_arp_update(void); 255 256 /* fetch routing table */ 257 u_char *mib_fetch_rtab(int af, int info, int arg, size_t *lenp); 258 259 /* process routing message */ 260 void mib_sroute_process(struct rt_msghdr *, struct sockaddr *, 261 struct sockaddr *, struct sockaddr *); 262 263 /* send a routing message */ 264 void mib_send_rtmsg(struct rt_msghdr *, struct sockaddr *, 265 struct sockaddr *, struct sockaddr *); 266 267 /* extract addresses from routing message */ 268 void mib_extract_addrs(int, u_char *, struct sockaddr **); 269 270 /* fetch routing table */ 271 int mib_fetch_route(void); 272