mibII_interfaces.c revision 155602
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 1.16 2005/11/02 12:07:40 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 */ 39struct 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 59static 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 */ 66static int 67ifchange_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 strncpy(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 strncpy(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 strncpy(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 */ 142static uint32_t 143ticks_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 */ 158int 159op_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 */ 190int 191op_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 == 293 LINK_STATE_DOWN) 294 value->v.integer = 5; /* state dormant */ 295 else 296 value->v.integer = 1; /* state up */ 297 } else 298 value->v.integer = 2; /* state down */ 299 break; 300 301 case LEAF_ifLastChange: 302 value->v.uint32 = 303 ticks_get_timeval(&ifp->mib.ifmd_data.ifi_lastchange); 304 break; 305 306 case LEAF_ifInOctets: 307 value->v.uint32 = ifp->mib.ifmd_data.ifi_ibytes; 308 break; 309 310 case LEAF_ifInUcastPkts: 311 value->v.uint32 = ifp->mib.ifmd_data.ifi_ipackets - 312 ifp->mib.ifmd_data.ifi_imcasts; 313 break; 314 315 case LEAF_ifInNUcastPkts: 316 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts; 317 break; 318 319 case LEAF_ifInDiscards: 320 value->v.uint32 = ifp->mib.ifmd_data.ifi_iqdrops; 321 break; 322 323 case LEAF_ifInErrors: 324 value->v.uint32 = ifp->mib.ifmd_data.ifi_ierrors; 325 break; 326 327 case LEAF_ifInUnknownProtos: 328 value->v.uint32 = ifp->mib.ifmd_data.ifi_noproto; 329 break; 330 331 case LEAF_ifOutOctets: 332 value->v.uint32 = ifp->mib.ifmd_data.ifi_obytes; 333 break; 334 335 case LEAF_ifOutUcastPkts: 336 value->v.uint32 = ifp->mib.ifmd_data.ifi_opackets - 337 ifp->mib.ifmd_data.ifi_omcasts; 338 break; 339 340 case LEAF_ifOutNUcastPkts: 341 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts; 342 break; 343 344 case LEAF_ifOutDiscards: 345 value->v.uint32 = ifp->mib.ifmd_snd_drops; 346 break; 347 348 case LEAF_ifOutErrors: 349 value->v.uint32 = ifp->mib.ifmd_data.ifi_oerrors; 350 break; 351 352 case LEAF_ifOutQLen: 353 value->v.uint32 = ifp->mib.ifmd_snd_len; 354 break; 355 356 case LEAF_ifSpecific: 357 value->v.oid = ifp->spec_oid; 358 break; 359 } 360 return (SNMP_ERR_NOERROR); 361} 362 363/* 364 * IfXtable entry 365 */ 366int 367op_ifxtable(struct snmp_context *ctx, struct snmp_value *value, 368 u_int sub, u_int iidx __unused, enum snmp_op op) 369{ 370 struct mibif *ifp = NULL; 371 int ret; 372 struct ifchange *ifc; 373 struct asn_oid idx; 374 375 switch (op) { 376 377 again: 378 if (op != SNMP_OP_GETNEXT) 379 return (SNMP_ERR_NOSUCHNAME); 380 /* FALLTHROUGH */ 381 382 case SNMP_OP_GETNEXT: 383 if ((ifp = NEXT_OBJECT_INT(&mibif_list, &value->var, sub)) == NULL) 384 return (SNMP_ERR_NOSUCHNAME); 385 value->var.len = sub + 1; 386 value->var.subs[sub] = ifp->index; 387 break; 388 389 case SNMP_OP_GET: 390 if (value->var.len - sub != 1) 391 return (SNMP_ERR_NOSUCHNAME); 392 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 393 return (SNMP_ERR_NOSUCHNAME); 394 break; 395 396 case SNMP_OP_SET: 397 if (value->var.len - sub != 1) 398 return (SNMP_ERR_NO_CREATION); 399 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL) 400 return (SNMP_ERR_NO_CREATION); 401 402 idx.len = 1; 403 idx.subs[0] = ifp->index; 404 405 if ((ifc = (struct ifchange *)snmp_dep_lookup(ctx, 406 &oid_ifTable, &idx, sizeof(*ifc), ifchange_func)) == NULL) 407 return (SNMP_ERR_RES_UNAVAIL); 408 ifc->ifindex = ifp->index; 409 410 switch (value->var.subs[sub - 1]) { 411 412 case LEAF_ifLinkUpDownTrapEnable: 413 if (value->v.integer != 1 && value->v.integer != 2) 414 return (SNMP_ERR_WRONG_VALUE); 415 if (ifc->set & IFC_TRAPS) 416 return (SNMP_ERR_INCONS_VALUE); 417 ifc->set |= IFC_TRAPS; 418 ifc->traps = (value->v.integer == 1) ? 1 : 0; 419 return (SNMP_ERR_NOERROR); 420 421 case LEAF_ifPromiscuousMode: 422 if (value->v.integer != 1 && value->v.integer != 2) 423 return (SNMP_ERR_WRONG_VALUE); 424 if (ifc->set & IFC_PROMISC) 425 return (SNMP_ERR_INCONS_VALUE); 426 ifc->set |= IFC_PROMISC; 427 ifc->promisc = (value->v.integer == 1) ? 1 : 0; 428 return (SNMP_ERR_NOERROR); 429 } 430 return (SNMP_ERR_NOT_WRITEABLE); 431 432 case SNMP_OP_ROLLBACK: 433 case SNMP_OP_COMMIT: 434 return (SNMP_ERR_NOERROR); 435 } 436 437 if (ifp->mibtick < this_tick) 438 (void)mib_fetch_ifmib(ifp); 439 440 ret = SNMP_ERR_NOERROR; 441 switch (value->var.subs[sub - 1]) { 442 443 case LEAF_ifName: 444 ret = string_get(value, ifp->name, -1); 445 break; 446 447 case LEAF_ifInMulticastPkts: 448 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts; 449 break; 450 451 case LEAF_ifInBroadcastPkts: 452 value->v.uint32 = 0; 453 break; 454 455 case LEAF_ifOutMulticastPkts: 456 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts; 457 break; 458 459 case LEAF_ifOutBroadcastPkts: 460 value->v.uint32 = 0; 461 break; 462 463 case LEAF_ifHCInOctets: 464 if (!(ifp->flags & MIBIF_HIGHSPEED)) 465 goto again; 466 value->v.counter64 = MIBIF_PRIV(ifp)->hc_inoctets; 467 break; 468 469 case LEAF_ifHCInUcastPkts: 470 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 471 goto again; 472 value->v.counter64 = MIBIF_PRIV(ifp)->hc_ipackets - 473 MIBIF_PRIV(ifp)->hc_imcasts; 474 break; 475 476 case LEAF_ifHCInMulticastPkts: 477 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 478 goto again; 479 value->v.counter64 = MIBIF_PRIV(ifp)->hc_imcasts; 480 break; 481 482 case LEAF_ifHCInBroadcastPkts: 483 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 484 goto again; 485 value->v.counter64 = 0; 486 break; 487 488 case LEAF_ifHCOutOctets: 489 if (!(ifp->flags & MIBIF_HIGHSPEED)) 490 goto again; 491 value->v.counter64 = MIBIF_PRIV(ifp)->hc_outoctets; 492 break; 493 494 case LEAF_ifHCOutUcastPkts: 495 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 496 goto again; 497 value->v.counter64 = MIBIF_PRIV(ifp)->hc_opackets - 498 MIBIF_PRIV(ifp)->hc_omcasts; 499 break; 500 501 case LEAF_ifHCOutMulticastPkts: 502 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 503 goto again; 504 value->v.counter64 = MIBIF_PRIV(ifp)->hc_omcasts; 505 break; 506 507 case LEAF_ifHCOutBroadcastPkts: 508 if (!(ifp->flags & (MIBIF_VERYHIGHSPEED|MIBIF_HIGHSPEED))) 509 goto again; 510 value->v.counter64 = 0; 511 break; 512 513 case LEAF_ifLinkUpDownTrapEnable: 514 value->v.integer = ifp->trap_enable ? 1 : 2; 515 break; 516 517 case LEAF_ifHighSpeed: 518 value->v.integer = 519 (ifp->mib.ifmd_data.ifi_baudrate + 499999) / 1000000; 520 break; 521 522 case LEAF_ifPromiscuousMode: 523 value->v.integer = 524 (ifp->mib.ifmd_flags & IFF_PROMISC) ? 1 : 2; 525 break; 526 527 case LEAF_ifConnectorPresent: 528 value->v.integer = ifp->has_connector ? 1 : 2; 529 break; 530 531 case LEAF_ifAlias: 532 ret = string_get(value, "", -1); 533 break; 534 535 case LEAF_ifCounterDiscontinuityTime: 536 if (ifp->counter_disc > start_tick) 537 value->v.uint32 = ifp->counter_disc - start_tick; 538 else 539 value->v.uint32 = 0; 540 break; 541 } 542 return (ret); 543} 544