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_interfaces.c,v 1.17 2006/02/14 09:04:19 brandt_h Exp $ 30 * 31 * Interfaces group. 32 */ 33 #include "mibII.h" 34 #include "mibII_oid.h" 35 36 /* 37 * This structure catches all changes to a interface entry 38 */ 39 struct ifchange { 40 struct snmp_dependency dep; 41 42 u_int ifindex; 43 44 uint32_t set; 45 int promisc; 46 int admin; 47 int traps; 48 49 uint32_t rb; 50 int rb_flags; 51 int rb_traps; 52 }; 53 #define IFC_PROMISC 0x0001 54 #define IFC_ADMIN 0x0002 55 #define IFC_TRAPS 0x0004 56 #define IFRB_FLAGS 0x0001 57 #define IFRB_TRAPS 0x0002 58 59 static const struct asn_oid 60 oid_ifTable = OIDX_ifTable; 61 62 /* 63 * This function handles all changes to the interface table and interface 64 * extension table. 65 */ 66 static int 67 ifchange_func(struct snmp_context *ctx __unused, struct snmp_dependency *dep, 68 enum snmp_depop op) 69 { 70 struct ifchange *ifc = (struct ifchange *)dep; 71 struct mibif *ifp; 72 struct ifreq ifr, ifr1; 73 74 if ((ifp = mib_find_if(ifc->ifindex)) == NULL) 75 return (SNMP_ERR_NO_CREATION); 76 77 switch (op) { 78 79 case SNMP_DEPOP_COMMIT: 80 strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name)); 81 if (ioctl(mib_netsock, SIOCGIFFLAGS, &ifr) == -1) { 82 syslog(LOG_ERR, "GIFFLAGS(%s): %m", ifp->name); 83 return (SNMP_ERR_GENERR); 84 } 85 if (ifc->set & IFC_PROMISC) { 86 ifr.ifr_flags &= ~IFF_PROMISC; 87 if (ifc->promisc) 88 ifr.ifr_flags |= IFF_PROMISC; 89 ifc->rb |= IFRB_FLAGS; 90 } 91 if (ifc->set & IFC_ADMIN) { 92 ifr.ifr_flags &= ~IFF_UP; 93 if (ifc->admin) 94 ifr.ifr_flags |= IFF_UP; 95 ifc->rb |= IFRB_FLAGS; 96 } 97 if (ifc->rb & IFRB_FLAGS) { 98 strlcpy(ifr1.ifr_name, ifp->name, sizeof(ifr1.ifr_name)); 99 if (ioctl(mib_netsock, SIOCGIFFLAGS, &ifr1) == -1) { 100 syslog(LOG_ERR, "GIFFLAGS(%s): %m", ifp->name); 101 return (SNMP_ERR_GENERR); 102 } 103 ifc->rb_flags = ifr1.ifr_flags; 104 if (ioctl(mib_netsock, SIOCSIFFLAGS, &ifr) == -1) { 105 syslog(LOG_ERR, "SIFFLAGS(%s): %m", ifp->name); 106 return (SNMP_ERR_GENERR); 107 } 108 (void)mib_fetch_ifmib(ifp); 109 } 110 if (ifc->set & IFC_TRAPS) { 111 ifc->rb |= IFRB_TRAPS; 112 ifc->rb_traps = ifp->trap_enable; 113 ifp->trap_enable = ifc->traps; 114 } 115 return (SNMP_ERR_NOERROR); 116 117 case SNMP_DEPOP_ROLLBACK: 118 if (ifc->rb & IFRB_FLAGS) { 119 strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name)); 120 ifr.ifr_flags = ifc->rb_flags; 121 if (ioctl(mib_netsock, SIOCSIFFLAGS, &ifr) == -1) { 122 syslog(LOG_ERR, "SIFFLAGS(%s): %m", ifp->name); 123 return (SNMP_ERR_UNDO_FAILED); 124 } 125 (void)mib_fetch_ifmib(ifp); 126 } 127 if (ifc->rb & IFRB_TRAPS) 128 ifp->trap_enable = ifc->rb_traps; 129 return (SNMP_ERR_NOERROR); 130 131 case SNMP_DEPOP_FINISH: 132 return (SNMP_ERR_NOERROR); 133 134 } 135 abort(); 136 } 137 138 /* 139 * Return difference to daemon start time in ticks truncated to a 140 * 32-bit value. If the timeval is 0 then return 0. 141 */ 142 static uint32_t 143 ticks_get_timeval(struct timeval *tv) 144 { 145 uint64_t v; 146 147 if (tv->tv_sec != 0 || tv->tv_usec != 0) { 148 v = 100ULL * tv->tv_sec + tv->tv_usec / 10000ULL; 149 if (v > start_tick) 150 return (v - start_tick); 151 } 152 return (0); 153 } 154 155 /* 156 * Scalars 157 */ 158 int 159 op_interfaces(struct snmp_context *ctx __unused, struct snmp_value *value, 160 u_int sub, u_int idx __unused, enum snmp_op op) 161 { 162 switch (op) { 163 164 case SNMP_OP_GETNEXT: 165 abort(); 166 167 case SNMP_OP_GET: 168 break; 169 170 case SNMP_OP_SET: 171 return (SNMP_ERR_NOT_WRITEABLE); 172 173 case SNMP_OP_ROLLBACK: 174 case SNMP_OP_COMMIT: 175 abort(); 176 } 177 178 switch (value->var.subs[sub - 1]) { 179 180 case LEAF_ifNumber: 181 value->v.integer = mib_if_number; 182 break; 183 } 184 return (SNMP_ERR_NOERROR); 185 } 186 187 /* 188 * Iftable entry 189 */ 190 int 191 op_ifentry(struct snmp_context *ctx, struct snmp_value *value, 192 u_int sub, u_int iidx __unused, enum snmp_op op) 193 { 194 struct mibif *ifp = NULL; 195 int ret; 196 struct ifchange *ifc; 197 struct asn_oid idx; 198 199 switch (op) { 200 201 case SNMP_OP_GETNEXT: 202 if ((ifp = NEXT_OBJECT_INT(&mibif_list, &value->var, sub)) == NULL) 203 return (SNMP_ERR_NOSUCHNAME); 204 value->var.len = sub + 1; 205 value->var.subs[sub] = ifp->index; 206 break; 207 208 case SNMP_OP_GET: 209 if (value->var.len - sub != 1) 210 return (SNMP_ERR_NOSUCHNAME); 211 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 212 return (SNMP_ERR_NOSUCHNAME); 213 break; 214 215 case SNMP_OP_SET: 216 if (value->var.len - sub != 1) 217 return (SNMP_ERR_NO_CREATION); 218 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 219 return (SNMP_ERR_NO_CREATION); 220 if (value->var.subs[sub - 1] != LEAF_ifAdminStatus) 221 return (SNMP_ERR_NOT_WRITEABLE); 222 223 idx.len = 1; 224 idx.subs[0] = ifp->index; 225 226 if (value->v.integer != 1 && value->v.integer != 2) 227 return (SNMP_ERR_WRONG_VALUE); 228 229 if ((ifc = (struct ifchange *)snmp_dep_lookup(ctx, 230 &oid_ifTable, &idx, sizeof(*ifc), ifchange_func)) == NULL) 231 return (SNMP_ERR_RES_UNAVAIL); 232 ifc->ifindex = ifp->index; 233 234 if (ifc->set & IFC_ADMIN) 235 return (SNMP_ERR_INCONS_VALUE); 236 ifc->set |= IFC_ADMIN; 237 ifc->admin = (value->v.integer == 1) ? 1 : 0; 238 239 return (SNMP_ERR_NOERROR); 240 241 case SNMP_OP_ROLLBACK: 242 case SNMP_OP_COMMIT: 243 return (SNMP_ERR_NOERROR); 244 } 245 246 if (ifp->mibtick < this_tick) 247 (void)mib_fetch_ifmib(ifp); 248 249 ret = SNMP_ERR_NOERROR; 250 switch (value->var.subs[sub - 1]) { 251 252 case LEAF_ifIndex: 253 value->v.integer = ifp->index; 254 break; 255 256 case LEAF_ifDescr: 257 ret = string_get(value, ifp->descr, -1); 258 break; 259 260 case LEAF_ifType: 261 value->v.integer = ifp->mib.ifmd_data.ifi_type; 262 break; 263 264 case LEAF_ifMtu: 265 value->v.integer = ifp->mib.ifmd_data.ifi_mtu; 266 break; 267 268 case LEAF_ifSpeed: 269 value->v.integer = ifp->mib.ifmd_data.ifi_baudrate; 270 break; 271 272 case LEAF_ifPhysAddress: 273 ret = string_get(value, ifp->physaddr, 274 ifp->physaddrlen); 275 break; 276 277 case LEAF_ifAdminStatus: 278 value->v.integer = 279 (ifp->mib.ifmd_flags & IFF_UP) ? 1 : 2; 280 break; 281 282 case LEAF_ifOperStatus: 283 /* 284 * According to RFC 2863 the state should be Up if the 285 * interface is ready to transmit packets. We takes this to 286 * mean that the interface should be running and should have 287 * a carrier. If it is running and has no carrier we interpret 288 * this as 'waiting for an external event' (plugging in the 289 * cable) and hence return 'dormant'. 290 */ 291 if (ifp->mib.ifmd_flags & IFF_RUNNING) { 292 if (ifp->mib.ifmd_data.ifi_link_state != LINK_STATE_UP) 293 value->v.integer = 5; /* state dormant */ 294 else 295 value->v.integer = 1; /* state up */ 296 } else 297 value->v.integer = 2; /* state down */ 298 break; 299 300 case LEAF_ifLastChange: 301 value->v.uint32 = 302 ticks_get_timeval(&ifp->mib.ifmd_data.ifi_lastchange); 303 break; 304 305 case LEAF_ifInOctets: 306 value->v.uint32 = ifp->mib.ifmd_data.ifi_ibytes; 307 break; 308 309 case LEAF_ifInUcastPkts: 310 value->v.uint32 = ifp->mib.ifmd_data.ifi_ipackets - 311 ifp->mib.ifmd_data.ifi_imcasts; 312 break; 313 314 case LEAF_ifInNUcastPkts: 315 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts; 316 break; 317 318 case LEAF_ifInDiscards: 319 value->v.uint32 = ifp->mib.ifmd_data.ifi_iqdrops; 320 break; 321 322 case LEAF_ifInErrors: 323 value->v.uint32 = ifp->mib.ifmd_data.ifi_ierrors; 324 break; 325 326 case LEAF_ifInUnknownProtos: 327 value->v.uint32 = ifp->mib.ifmd_data.ifi_noproto; 328 break; 329 330 case LEAF_ifOutOctets: 331 value->v.uint32 = ifp->mib.ifmd_data.ifi_obytes; 332 break; 333 334 case LEAF_ifOutUcastPkts: 335 value->v.uint32 = ifp->mib.ifmd_data.ifi_opackets - 336 ifp->mib.ifmd_data.ifi_omcasts; 337 break; 338 339 case LEAF_ifOutNUcastPkts: 340 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts; 341 break; 342 343 case LEAF_ifOutDiscards: 344 value->v.uint32 = ifp->mib.ifmd_snd_drops; 345 break; 346 347 case LEAF_ifOutErrors: 348 value->v.uint32 = ifp->mib.ifmd_data.ifi_oerrors; 349 break; 350 351 case LEAF_ifOutQLen: 352 value->v.uint32 = ifp->mib.ifmd_snd_len; 353 break; 354 355 case LEAF_ifSpecific: 356 value->v.oid = ifp->spec_oid; 357 break; 358 } 359 return (ret); 360 } 361 362 /* 363 * IfXtable entry 364 */ 365 int 366 op_ifxtable(struct snmp_context *ctx, struct snmp_value *value, 367 u_int sub, u_int iidx __unused, enum snmp_op op) 368 { 369 struct mibif *ifp = NULL; 370 int ret; 371 struct ifchange *ifc; 372 struct asn_oid idx; 373 374 switch (op) { 375 376 again: 377 if (op != SNMP_OP_GETNEXT) 378 return (SNMP_ERR_NOSUCHNAME); 379 /* FALLTHROUGH */ 380 381 case SNMP_OP_GETNEXT: 382 if ((ifp = NEXT_OBJECT_INT(&mibif_list, &value->var, sub)) == NULL) 383 return (SNMP_ERR_NOSUCHNAME); 384 value->var.len = sub + 1; 385 value->var.subs[sub] = ifp->index; 386 break; 387 388 case SNMP_OP_GET: 389 if (value->var.len - sub != 1) 390 return (SNMP_ERR_NOSUCHNAME); 391 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 392 return (SNMP_ERR_NOSUCHNAME); 393 break; 394 395 case SNMP_OP_SET: 396 if (value->var.len - sub != 1) 397 return (SNMP_ERR_NO_CREATION); 398 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 399 return (SNMP_ERR_NO_CREATION); 400 401 idx.len = 1; 402 idx.subs[0] = ifp->index; 403 404 if ((ifc = (struct ifchange *)snmp_dep_lookup(ctx, 405 &oid_ifTable, &idx, sizeof(*ifc), ifchange_func)) == NULL) 406 return (SNMP_ERR_RES_UNAVAIL); 407 ifc->ifindex = ifp->index; 408 409 switch (value->var.subs[sub - 1]) { 410 411 case LEAF_ifLinkUpDownTrapEnable: 412 if (value->v.integer != 1 && value->v.integer != 2) 413 return (SNMP_ERR_WRONG_VALUE); 414 if (ifc->set & IFC_TRAPS) 415 return (SNMP_ERR_INCONS_VALUE); 416 ifc->set |= IFC_TRAPS; 417 ifc->traps = (value->v.integer == 1) ? 1 : 0; 418 return (SNMP_ERR_NOERROR); 419 420 case LEAF_ifPromiscuousMode: 421 if (value->v.integer != 1 && value->v.integer != 2) 422 return (SNMP_ERR_WRONG_VALUE); 423 if (ifc->set & IFC_PROMISC) 424 return (SNMP_ERR_INCONS_VALUE); 425 ifc->set |= IFC_PROMISC; 426 ifc->promisc = (value->v.integer == 1) ? 1 : 0; 427 return (SNMP_ERR_NOERROR); 428 } 429 return (SNMP_ERR_NOT_WRITEABLE); 430 431 case SNMP_OP_ROLLBACK: 432 case SNMP_OP_COMMIT: 433 return (SNMP_ERR_NOERROR); 434 } 435 436 if (ifp->mibtick < this_tick) 437 (void)mib_fetch_ifmib(ifp); 438 439 ret = SNMP_ERR_NOERROR; 440 switch (value->var.subs[sub - 1]) { 441 442 case LEAF_ifName: 443 ret = string_get(value, ifp->name, -1); 444 break; 445 446 case LEAF_ifInMulticastPkts: 447 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts; 448 break; 449 450 case LEAF_ifInBroadcastPkts: 451 value->v.uint32 = 0; 452 break; 453 454 case LEAF_ifOutMulticastPkts: 455 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts; 456 break; 457 458 case LEAF_ifOutBroadcastPkts: 459 value->v.uint32 = 0; 460 break; 461 462 case LEAF_ifHCInOctets: 463 if (!(ifp->flags & MIBIF_HIGHSPEED)) 464 goto again; 465 value->v.counter64 = MIBIF_PRIV(ifp)->hc_inoctets; 466 break; 467 468 case LEAF_ifHCInUcastPkts: 469 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 470 goto again; 471 value->v.counter64 = MIBIF_PRIV(ifp)->hc_ipackets - 472 MIBIF_PRIV(ifp)->hc_imcasts; 473 break; 474 475 case LEAF_ifHCInMulticastPkts: 476 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 477 goto again; 478 value->v.counter64 = MIBIF_PRIV(ifp)->hc_imcasts; 479 break; 480 481 case LEAF_ifHCInBroadcastPkts: 482 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 483 goto again; 484 value->v.counter64 = 0; 485 break; 486 487 case LEAF_ifHCOutOctets: 488 if (!(ifp->flags & MIBIF_HIGHSPEED)) 489 goto again; 490 value->v.counter64 = MIBIF_PRIV(ifp)->hc_outoctets; 491 break; 492 493 case LEAF_ifHCOutUcastPkts: 494 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 495 goto again; 496 value->v.counter64 = MIBIF_PRIV(ifp)->hc_opackets - 497 MIBIF_PRIV(ifp)->hc_omcasts; 498 break; 499 500 case LEAF_ifHCOutMulticastPkts: 501 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 502 goto again; 503 value->v.counter64 = MIBIF_PRIV(ifp)->hc_omcasts; 504 break; 505 506 case LEAF_ifHCOutBroadcastPkts: 507 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 508 goto again; 509 value->v.counter64 = 0; 510 break; 511 512 case LEAF_ifLinkUpDownTrapEnable: 513 value->v.integer = ifp->trap_enable ? 1 : 2; 514 break; 515 516 case LEAF_ifHighSpeed: 517 value->v.integer = 518 (ifp->mib.ifmd_data.ifi_baudrate + 499999) / 1000000; 519 break; 520 521 case LEAF_ifPromiscuousMode: 522 value->v.integer = 523 (ifp->mib.ifmd_flags & IFF_PROMISC) ? 1 : 2; 524 break; 525 526 case LEAF_ifConnectorPresent: 527 value->v.integer = ifp->has_connector ? 1 : 2; 528 break; 529 530 case LEAF_ifAlias: 531 ret = string_get(value, MIBIF_PRIV(ifp)->alias, -1); 532 break; 533 534 case LEAF_ifCounterDiscontinuityTime: 535 if (ifp->counter_disc > start_tick) 536 value->v.uint32 = ifp->counter_disc - start_tick; 537 else 538 value->v.uint32 = 0; 539 break; 540 } 541 return (ret); 542 } 543