contrib/bsnmp/snmpd/trap.c

   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  * Copyright (c) 2010 The FreeBSD Foundation
   9  * All rights reserved.
  10  *
  11  * Portions of this software were developed by Shteryana Sotirova Shopova
  12  * under sponsorship from the FreeBSD Foundation.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $Begemot: bsnmp/snmpd/trap.c,v 1.9 2005/10/04 11:21:39 brandt_h Exp $
  36  *
  37  * TrapSinkTable
  38  */
  39 #include <sys/types.h>
  40 #include <sys/queue.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/un.h>
  43 #include <stdint.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <stdarg.h>
  47 #include <stdarg.h>
  48 #include <string.h>
  49 #include <ctype.h>
  50 #include <syslog.h>
  51 #include <unistd.h>
  52 #include <netinet/in.h>
  53 #include <arpa/inet.h>
  54
  55 #include "snmpmod.h"
  56 #include "snmpd.h"
  57 #include "tree.h"
  58 #include "oid.h"
  59
  60 struct trapsink_list trapsink_list = TAILQ_HEAD_INITIALIZER(trapsink_list);
  61
  62 /* List of target addresses */
  63 static struct target_addresslist target_addresslist =
  64     SLIST_HEAD_INITIALIZER(target_addresslist);
  65
  66 /* List of target parameters */
  67 static struct target_paramlist target_paramlist =
  68     SLIST_HEAD_INITIALIZER(target_paramlist);
  69
  70 /* List of notification targets */
  71 static struct target_notifylist target_notifylist =
  72     SLIST_HEAD_INITIALIZER(target_notifylist);
  73
  74 static const struct asn_oid oid_begemotTrapSinkTable =
  75     OIDX_begemotTrapSinkTable;
  76 static const struct asn_oid oid_sysUpTime = OIDX_sysUpTime;
  77 static const struct asn_oid oid_snmpTrapOID = OIDX_snmpTrapOID;
  78
  79 struct trapsink_dep {
  80         struct snmp_dependency dep;
  81         u_int   set;
  82         u_int   status;
  83         u_char  comm[SNMP_COMMUNITY_MAXLEN + 1];
  84         u_int   version;
  85         u_int   rb;
  86         u_int   rb_status;
  87         u_int   rb_version;
  88         u_char  rb_comm[SNMP_COMMUNITY_MAXLEN + 1];
  89 };
  90 enum {
  91         TDEP_STATUS     = 0x0001,
  92         TDEP_COMM       = 0x0002,
  93         TDEP_VERSION    = 0x0004,
  94
  95         TDEP_CREATE     = 0x0001,
  96         TDEP_MODIFY     = 0x0002,
  97         TDEP_DESTROY    = 0x0004,
  98 };
  99
 100 static int
 101 trapsink_create(struct trapsink_dep *tdep)
 102 {
 103         struct trapsink *t;
 104         struct sockaddr_in sa;
 105
 106         if ((t = malloc(sizeof(*t))) == NULL)
 107                 return (SNMP_ERR_RES_UNAVAIL);
 108
 109         t->index = tdep->dep.idx;
 110         t->status = TRAPSINK_NOT_READY;
 111         t->comm[0] = '\0';
 112         t->version = TRAPSINK_V2;
 113
 114         if ((t->socket = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
 115                 syslog(LOG_ERR, "socket(UDP): %m");
 116                 free(t);
 117                 return (SNMP_ERR_RES_UNAVAIL);
 118         }
 119         (void)shutdown(t->socket, SHUT_RD);
 120         memset(&sa, 0, sizeof(sa));
 121         sa.sin_len = sizeof(sa);
 122         sa.sin_family = AF_INET;
 123         sa.sin_addr.s_addr = htonl((t->index.subs[0] << 24) |
 124             (t->index.subs[1] << 16) | (t->index.subs[2] << 8) |
 125             (t->index.subs[3] << 0));
 126         sa.sin_port = htons(t->index.subs[4]);
 127
 128         if (connect(t->socket, (struct sockaddr *)&sa, sa.sin_len) == -1) {
 129                 syslog(LOG_ERR, "connect(%s,%u): %m",
 130                     inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
 131                 (void)close(t->socket);
 132                 free(t);
 133                 return (SNMP_ERR_GENERR);
 134         }
 135
 136         if (tdep->set & TDEP_VERSION)
 137                 t->version = tdep->version;
 138         if (tdep->set & TDEP_COMM)
 139                 strcpy(t->comm, tdep->comm);
 140
 141         if (t->comm[0] != '\0')
 142                 t->status = TRAPSINK_NOT_IN_SERVICE;
 143
 144         /* look whether we should activate */
 145         if (tdep->status == 4) {
 146                 if (t->status == TRAPSINK_NOT_READY) {
 147                         if (t->socket != -1)
 148                                 (void)close(t->socket);
 149                         free(t);
 150                         return (SNMP_ERR_INCONS_VALUE);
 151                 }
 152                 t->status = TRAPSINK_ACTIVE;
 153         }
 154
 155         INSERT_OBJECT_OID(t, &trapsink_list);
 156
 157         tdep->rb |= TDEP_CREATE;
 158
 159         return (SNMP_ERR_NOERROR);
 160 }
 161
 162 static void
 163 trapsink_free(struct trapsink *t)
 164 {
 165         TAILQ_REMOVE(&trapsink_list, t, link);
 166         if (t->socket != -1)
 167                 (void)close(t->socket);
 168         free(t);
 169 }
 170
 171 static int
 172 trapsink_modify(struct trapsink *t, struct trapsink_dep *tdep)
 173 {
 174         tdep->rb_status = t->status;
 175         tdep->rb_version = t->version;
 176         strcpy(tdep->rb_comm, t->comm);
 177
 178         if (tdep->set & TDEP_STATUS) {
 179                 /* if we are active and should move to not_in_service do
 180                  * this first */
 181                 if (tdep->status == 2 && tdep->rb_status == TRAPSINK_ACTIVE) {
 182                         t->status = TRAPSINK_NOT_IN_SERVICE;
 183                         tdep->rb |= TDEP_MODIFY;
 184                 }
 185         }
 186
 187         if (tdep->set & TDEP_VERSION)
 188                 t->version = tdep->version;
 189         if (tdep->set & TDEP_COMM)
 190                 strcpy(t->comm, tdep->comm);
 191
 192         if (tdep->set & TDEP_STATUS) {
 193                 /* if we were inactive and should go active - do this now */
 194                 if (tdep->status == 1 && tdep->rb_status != TRAPSINK_ACTIVE) {
 195                         if (t->comm[0] == '\0') {
 196                                 t->status = tdep->rb_status;
 197                                 t->version = tdep->rb_version;
 198                                 strcpy(t->comm, tdep->rb_comm);
 199                                 return (SNMP_ERR_INCONS_VALUE);
 200                         }
 201                         t->status = TRAPSINK_ACTIVE;
 202                         tdep->rb |= TDEP_MODIFY;
 203                 }
 204         }
 205         return (SNMP_ERR_NOERROR);
 206 }
 207
 208 static int
 209 trapsink_unmodify(struct trapsink *t, struct trapsink_dep *tdep)
 210 {
 211         if (tdep->set & TDEP_STATUS)
 212                 t->status = tdep->rb_status;
 213         if (tdep->set & TDEP_VERSION)
 214                 t->version = tdep->rb_version;
 215         if (tdep->set & TDEP_COMM)
 216                 strcpy(t->comm, tdep->rb_comm);
 217
 218         return (SNMP_ERR_NOERROR);
 219 }
 220
 221 static int
 222 trapsink_destroy(struct snmp_context *ctx __unused, struct trapsink *t,
 223     struct trapsink_dep *tdep)
 224 {
 225         t->status = TRAPSINK_DESTROY;
 226         tdep->rb_status = t->status;
 227         tdep->rb |= TDEP_DESTROY;
 228         return (SNMP_ERR_NOERROR);
 229 }
 230
 231 static int
 232 trapsink_undestroy(struct trapsink *t, struct trapsink_dep *tdep)
 233 {
 234         t->status = tdep->rb_status;
 235         return (SNMP_ERR_NOERROR);
 236 }
 237
 238 static int
 239 trapsink_dep(struct snmp_context *ctx, struct snmp_dependency *dep,
 240     enum snmp_depop op)
 241 {
 242         struct trapsink_dep *tdep = (struct trapsink_dep *)dep;
 243         struct trapsink *t;
 244
 245         t = FIND_OBJECT_OID(&trapsink_list, &dep->idx, 0);
 246
 247         switch (op) {
 248
 249           case SNMP_DEPOP_COMMIT:
 250                 if (tdep->set & TDEP_STATUS) {
 251                         switch (tdep->status) {
 252
 253                           case 1:
 254                           case 2:
 255                                 if (t == NULL)
 256                                         return (SNMP_ERR_INCONS_VALUE);
 257                                 return (trapsink_modify(t, tdep));
 258
 259                           case 4:
 260                           case 5:
 261                                 if (t != NULL)
 262                                         return (SNMP_ERR_INCONS_VALUE);
 263                                 return (trapsink_create(tdep));
 264
 265                           case 6:
 266                                 if (t == NULL)
 267                                         return (SNMP_ERR_NOERROR);
 268                                 return (trapsink_destroy(ctx, t, tdep));
 269                         }
 270                 } else if (tdep->set != 0)
 271                         return (trapsink_modify(t, tdep));
 272
 273                 return (SNMP_ERR_NOERROR);
 274
 275           case SNMP_DEPOP_ROLLBACK:
 276                 if (tdep->rb & TDEP_CREATE) {
 277                         trapsink_free(t);
 278                         return (SNMP_ERR_NOERROR);
 279                 }
 280                 if (tdep->rb & TDEP_MODIFY)
 281                         return (trapsink_unmodify(t, tdep));
 282                 if(tdep->rb & TDEP_DESTROY)
 283                         return (trapsink_undestroy(t, tdep));
 284                 return (SNMP_ERR_NOERROR);
 285
 286           case SNMP_DEPOP_FINISH:
 287                 if ((tdep->rb & TDEP_DESTROY) && t != NULL &&
 288                     ctx->code == SNMP_RET_OK)
 289                         trapsink_free(t);
 290                 return (SNMP_ERR_NOERROR);
 291         }
 292         abort();
 293 }
 294
 295 int
 296 op_trapsink(struct snmp_context *ctx, struct snmp_value *value,
 297     u_int sub, u_int iidx, enum snmp_op op)
 298 {
 299         struct trapsink *t;
 300         u_char ipa[4];
 301         int32_t port;
 302         struct asn_oid idx;
 303         struct trapsink_dep *tdep;
 304         u_char *p;
 305
 306         t = NULL;               /* gcc */
 307
 308         switch (op) {
 309
 310           case SNMP_OP_GETNEXT:
 311                 if ((t = NEXT_OBJECT_OID(&trapsink_list, &value->var, sub)) == NULL)
 312                         return (SNMP_ERR_NOSUCHNAME);
 313                 index_append(&value->var, sub, &t->index);
 314                 break;
 315
 316           case SNMP_OP_GET:
 317                 if ((t = FIND_OBJECT_OID(&trapsink_list, &value->var, sub)) == NULL)
 318                         return (SNMP_ERR_NOSUCHNAME);
 319                 break;
 320
 321           case SNMP_OP_SET:
 322                 if (index_decode(&value->var, sub, iidx, ipa, &port) ||
 323                     port == 0 || port > 65535)
 324                         return (SNMP_ERR_NO_CREATION);
 325                 t = FIND_OBJECT_OID(&trapsink_list, &value->var, sub);
 326
 327                 asn_slice_oid(&idx, &value->var, sub, value->var.len);
 328
 329                 tdep = (struct trapsink_dep *)snmp_dep_lookup(ctx,
 330                     &oid_begemotTrapSinkTable, &idx,
 331                     sizeof(*tdep), trapsink_dep);
 332                 if (tdep == NULL)
 333                         return (SNMP_ERR_RES_UNAVAIL);
 334
 335                 switch (value->var.subs[sub - 1]) {
 336
 337                   case LEAF_begemotTrapSinkStatus:
 338                         if (tdep->set & TDEP_STATUS)
 339                                 return (SNMP_ERR_INCONS_VALUE);
 340                         switch (value->v.integer) {
 341
 342                           case 1:
 343                           case 2:
 344                                 if (t == NULL)
 345                                         return (SNMP_ERR_INCONS_VALUE);
 346                                 break;
 347
 348                           case 4:
 349                           case 5:
 350                                 if (t != NULL)
 351                                         return (SNMP_ERR_INCONS_VALUE);
 352                                 break;
 353
 354                           case 6:
 355                                 break;
 356
 357                           default:
 358                                 return (SNMP_ERR_WRONG_VALUE);
 359                         }
 360                         tdep->status = value->v.integer;
 361                         tdep->set |= TDEP_STATUS;
 362                         return (SNMP_ERR_NOERROR);
 363
 364                   case LEAF_begemotTrapSinkComm:
 365                         if (tdep->set & TDEP_COMM)
 366                                 return (SNMP_ERR_INCONS_VALUE);
 367                         if (value->v.octetstring.len == 0 ||
 368                             value->v.octetstring.len > SNMP_COMMUNITY_MAXLEN)
 369                                 return (SNMP_ERR_WRONG_VALUE);
 370                         for (p = value->v.octetstring.octets;
 371                              p < value->v.octetstring.octets + value->v.octetstring.len;
 372                              p++) {
 373                                 if (!isascii(*p) || !isprint(*p))
 374                                         return (SNMP_ERR_WRONG_VALUE);
 375                         }
 376                         tdep->set |= TDEP_COMM;
 377                         strncpy(tdep->comm, value->v.octetstring.octets,
 378                             value->v.octetstring.len);
 379                         tdep->comm[value->v.octetstring.len] = '\0';
 380                         return (SNMP_ERR_NOERROR);
 381
 382                   case LEAF_begemotTrapSinkVersion:
 383                         if (tdep->set & TDEP_VERSION)
 384                                 return (SNMP_ERR_INCONS_VALUE);
 385                         if (value->v.integer != TRAPSINK_V1 &&
 386                             value->v.integer != TRAPSINK_V2)
 387                                 return (SNMP_ERR_WRONG_VALUE);
 388                         tdep->version = value->v.integer;
 389                         tdep->set |= TDEP_VERSION;
 390                         return (SNMP_ERR_NOERROR);
 391                 }
 392                 if (t == NULL)
 393                         return (SNMP_ERR_INCONS_NAME);
 394                 else
 395                         return (SNMP_ERR_NOT_WRITEABLE);
 396
 397
 398           case SNMP_OP_ROLLBACK:
 399           case SNMP_OP_COMMIT:
 400                 return (SNMP_ERR_NOERROR);
 401         }
 402
 403         switch (value->var.subs[sub - 1]) {
 404
 405           case LEAF_begemotTrapSinkStatus:
 406                 value->v.integer = t->status;
 407                 break;
 408
 409           case LEAF_begemotTrapSinkComm:
 410                 return (string_get(value, t->comm, -1));
 411
 412           case LEAF_begemotTrapSinkVersion:
 413                 value->v.integer = t->version;
 414                 break;
 415
 416         }
 417         return (SNMP_ERR_NOERROR);
 418 }
 419
 420 static void
 421 snmp_create_v1_trap(struct snmp_pdu *pdu, char *com,
 422     const struct asn_oid *trap_oid)
 423 {
 424         memset(pdu, 0, sizeof(*pdu));
 425         strlcpy(pdu->community, com, sizeof(pdu->community));
 426
 427         pdu->version = SNMP_V1;
 428         pdu->type = SNMP_PDU_TRAP;
 429         pdu->enterprise = systemg.object_id;
 430         memcpy(pdu->agent_addr, snmpd.trap1addr, 4);
 431         pdu->generic_trap = trap_oid->subs[trap_oid->len - 1] - 1;
 432         pdu->specific_trap = 0;
 433         pdu->time_stamp = get_ticks() - start_tick;
 434         pdu->nbindings = 0;
 435 }
 436
 437 static void
 438 snmp_create_v2_trap(struct snmp_pdu *pdu, char *com,
 439     const struct asn_oid *trap_oid)
 440 {
 441         memset(pdu, 0, sizeof(*pdu));
 442         strlcpy(pdu->community, com, sizeof(pdu->community));
 443
 444         pdu->version = SNMP_V2c;
 445         pdu->type = SNMP_PDU_TRAP2;
 446         pdu->request_id = reqid_next(trap_reqid);
 447         pdu->error_index = 0;
 448         pdu->error_status = SNMP_ERR_NOERROR;
 449
 450         pdu->bindings[0].var = oid_sysUpTime;
 451         pdu->bindings[0].var.subs[pdu->bindings[0].var.len++] = 0;
 452         pdu->bindings[0].syntax = SNMP_SYNTAX_TIMETICKS;
 453         pdu->bindings[0].v.uint32 = get_ticks() - start_tick;
 454
 455         pdu->bindings[1].var = oid_snmpTrapOID;
 456         pdu->bindings[1].var.subs[pdu->bindings[1].var.len++] = 0;
 457         pdu->bindings[1].syntax = SNMP_SYNTAX_OID;
 458         pdu->bindings[1].v.oid = *trap_oid;
 459
 460         pdu->nbindings = 2;
 461 }
 462
 463 static void
 464 snmp_create_v3_trap(struct snmp_pdu *pdu, struct target_param *target,
 465     const struct asn_oid *trap_oid)
 466 {
 467         struct usm_user *usmuser;
 468
 469         memset(pdu, 0, sizeof(*pdu));
 470
 471         pdu->version = SNMP_V3;
 472         pdu->type = SNMP_PDU_TRAP2;
 473         pdu->request_id = reqid_next(trap_reqid);
 474         pdu->error_index = 0;
 475         pdu->error_status = SNMP_ERR_NOERROR;
 476
 477         pdu->bindings[0].var = oid_sysUpTime;
 478         pdu->bindings[0].var.subs[pdu->bindings[0].var.len++] = 0;
 479         pdu->bindings[0].syntax = SNMP_SYNTAX_TIMETICKS;
 480         pdu->bindings[0].v.uint32 = get_ticks() - start_tick;
 481
 482         pdu->bindings[1].var = oid_snmpTrapOID;
 483         pdu->bindings[1].var.subs[pdu->bindings[1].var.len++] = 0;
 484         pdu->bindings[1].syntax = SNMP_SYNTAX_OID;
 485         pdu->bindings[1].v.oid = *trap_oid;
 486
 487         pdu->nbindings = 2;
 488
 489         update_snmpd_engine_time();
 490
 491         memcpy(pdu->engine.engine_id, snmpd_engine.engine_id,
 492             snmpd_engine.engine_len);
 493         pdu->engine.engine_len = snmpd_engine.engine_len;
 494         pdu->engine.engine_boots = snmpd_engine.engine_boots;
 495         pdu->engine.engine_time = snmpd_engine.engine_time;
 496         pdu->engine.max_msg_size = snmpd_engine.max_msg_size;
 497         strlcpy(pdu->user.sec_name, target->secname,
 498             sizeof(pdu->user.sec_name));
 499         pdu->security_model = target->sec_model;
 500
 501         pdu->context_engine_len = snmpd_engine.engine_len;
 502         memcpy(pdu->context_engine, snmpd_engine.engine_id,
 503             snmpd_engine.engine_len);
 504
 505         if (target->sec_model == SNMP_SECMODEL_USM &&
 506             target->sec_level != SNMP_noAuthNoPriv) {
 507                 usmuser = usm_find_user(pdu->engine.engine_id,
 508                    pdu->engine.engine_len, pdu->user.sec_name);
 509                 if (usmuser != NULL) {
 510                         pdu->user.auth_proto = usmuser->suser.auth_proto;
 511                         pdu->user.priv_proto = usmuser->suser.priv_proto;
 512                         memcpy(pdu->user.auth_key, usmuser->suser.auth_key,
 513                             sizeof(pdu->user.auth_key));
 514                         memcpy(pdu->user.priv_key, usmuser->suser.priv_key,
 515                             sizeof(pdu->user.priv_key));
 516                 }
 517                 snmp_pdu_init_secparams(pdu);
 518         }
 519 }
 520
 521 void
 522 snmp_send_trap(const struct asn_oid *trap_oid, ...)
 523 {
 524         struct snmp_pdu pdu;
 525         struct trapsink *t;
 526         const struct snmp_value *v;
 527         struct target_notify *n;
 528         struct target_address *ta;
 529         struct target_param *tp;
 530
 531         va_list ap;
 532         u_char *sndbuf;
 533         char *tag;
 534         size_t sndlen;
 535         ssize_t len;
 536         int32_t ip;
 537
 538         TAILQ_FOREACH(t, &trapsink_list, link) {
 539                 if (t->status != TRAPSINK_ACTIVE)
 540                         continue;
 541
 542                 if (t->version == TRAPSINK_V1)
 543                         snmp_create_v1_trap(&pdu, t->comm, trap_oid);
 544                 else
 545                         snmp_create_v2_trap(&pdu, t->comm, trap_oid);
 546
 547                 va_start(ap, trap_oid);
 548                 while ((v = va_arg(ap, const struct snmp_value *)) != NULL)
 549                         pdu.bindings[pdu.nbindings++] = *v;
 550                 va_end(ap);
 551
 552                 if (snmp_pdu_auth_access(&pdu, &ip) != SNMP_CODE_OK) {
 553                         syslog(LOG_DEBUG, "send trap to %s failed: no access",
 554                             t->comm);
 555                         continue;
 556                 }
 557
 558                 if ((sndbuf = buf_alloc(1)) == NULL) {
 559                         syslog(LOG_ERR, "trap send buffer: %m");
 560                         return;
 561                 }
 562
 563                 snmp_output(&pdu, sndbuf, &sndlen, "TRAP");
 564
 565                 if ((len = send(t->socket, sndbuf, sndlen, 0)) == -1)
 566                         syslog(LOG_ERR, "send: %m");
 567                 else if ((size_t)len != sndlen)
 568                         syslog(LOG_ERR, "send: short write %zu/%zu",
 569                             sndlen, (size_t)len);
 570
 571                 free(sndbuf);
 572         }
 573
 574         SLIST_FOREACH(n, &target_notifylist, tn) {
 575                 if (n->status != RowStatus_active || n->taglist[0] == '\0')
 576                         continue;
 577
 578                 SLIST_FOREACH(ta, &target_addresslist, ta)
 579                         if ((tag = strstr(ta->taglist, n->taglist)) != NULL  &&
 580                             (tag[strlen(n->taglist)] == ' ' ||
 581                              tag[strlen(n->taglist)] == '\0' ||
 582                              tag[strlen(n->taglist)] == '\t' ||
 583                              tag[strlen(n->taglist)] == '\r' ||
 584                              tag[strlen(n->taglist)] == '\n') &&
 585                              ta->status == RowStatus_active)
 586                                 break;
 587                 if (ta == NULL)
 588                         continue;
 589
 590                 SLIST_FOREACH(tp, &target_paramlist, tp)
 591                         if (strcmp(tp->name, ta->paramname) == 0 &&
 592                             tp->status == 1)
 593                                 break;
 594                 if (tp == NULL)
 595                         continue;
 596
 597                 switch (tp->mpmodel) {
 598                 case SNMP_MPM_SNMP_V1:
 599                         snmp_create_v1_trap(&pdu, tp->secname, trap_oid);
 600                         break;
 601
 602                 case SNMP_MPM_SNMP_V2c:
 603                         snmp_create_v2_trap(&pdu, tp->secname, trap_oid);
 604                         break;
 605
 606                 case SNMP_MPM_SNMP_V3:
 607                         snmp_create_v3_trap(&pdu, tp, trap_oid);
 608                         break;
 609
 610                 default:
 611                         continue;
 612                 }
 613
 614                 va_start(ap, trap_oid);
 615                 while ((v = va_arg(ap, const struct snmp_value *)) != NULL)
 616                         pdu.bindings[pdu.nbindings++] = *v;
 617                 va_end(ap);
 618
 619                 if (snmp_pdu_auth_access(&pdu, &ip) != SNMP_CODE_OK) {
 620                         syslog(LOG_DEBUG, "send trap to %s failed: no access",
 621                             t->comm);
 622                         continue;
 623                 }
 624
 625                 if ((sndbuf = buf_alloc(1)) == NULL) {
 626                         syslog(LOG_ERR, "trap send buffer: %m");
 627                         return;
 628                 }
 629
 630                 snmp_output(&pdu, sndbuf, &sndlen, "TRAP");
 631
 632                 if ((len = send(ta->socket, sndbuf, sndlen, 0)) == -1)
 633                         syslog(LOG_ERR, "send: %m");
 634                 else if ((size_t)len != sndlen)
 635                         syslog(LOG_ERR, "send: short write %zu/%zu",
 636                             sndlen, (size_t)len);
 637
 638                 free(sndbuf);
 639         }
 640 }
 641
 642 /*
 643  * RFC 3413 SNMP Management Target MIB
 644  */
 645 struct snmpd_target_stats *
 646 bsnmpd_get_target_stats(void)
 647 {
 648         return (&snmpd_target_stats);
 649 }
 650
 651 struct target_address *
 652 target_first_address(void)
 653 {
 654         return (SLIST_FIRST(&target_addresslist));
 655 }
 656
 657 struct target_address *
 658 target_next_address(struct target_address *addrs)
 659 {
 660         if (addrs == NULL)
 661                 return (NULL);
 662
 663         return (SLIST_NEXT(addrs, ta));
 664 }
 665
 666 struct target_address *
 667 target_new_address(char *aname)
 668 {
 669         int cmp;
 670         struct target_address *addrs, *temp, *prev;
 671
 672         SLIST_FOREACH(addrs, &target_addresslist, ta)
 673                 if (strcmp(aname, addrs->name) == 0)
 674                         return (NULL);
 675
 676         if ((addrs = (struct target_address *)malloc(sizeof(*addrs))) == NULL)
 677                 return (NULL);
 678
 679         memset(addrs, 0, sizeof(*addrs));
 680         strlcpy(addrs->name, aname, sizeof(addrs->name));
 681         addrs->timeout = 150;
 682         addrs->retry = 3; /* XXX */
 683
 684         if ((prev = SLIST_FIRST(&target_addresslist)) == NULL ||
 685             strcmp(aname, prev->name) < 0) {
 686                 SLIST_INSERT_HEAD(&target_addresslist, addrs, ta);
 687                 return (addrs);
 688         }
 689
 690         SLIST_FOREACH(temp, &target_addresslist, ta) {
 691                 if ((cmp = strcmp(aname, temp->name)) <= 0)
 692                         break;
 693                 prev = temp;
 694         }
 695
 696         if (temp == NULL || cmp < 0)
 697                 SLIST_INSERT_AFTER(prev, addrs, ta);
 698         else if (cmp > 0)
 699                 SLIST_INSERT_AFTER(temp, addrs, ta);
 700         else {
 701                 syslog(LOG_ERR, "Target address %s exists", addrs->name);
 702                 free(addrs);
 703                 return (NULL);
 704         }
 705
 706         return (addrs);
 707 }
 708
 709 int
 710 target_activate_address(struct target_address *addrs)
 711 {
 712         struct sockaddr_in sa;
 713
 714         if ((addrs->socket = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
 715                 syslog(LOG_ERR, "socket(UDP): %m");
 716                 return (SNMP_ERR_RES_UNAVAIL);
 717         }
 718
 719         (void)shutdown(addrs->socket, SHUT_RD);
 720         memset(&sa, 0, sizeof(sa));
 721         sa.sin_len = sizeof(sa);
 722         sa.sin_family = AF_INET;
 723
 724         sa.sin_addr.s_addr = htonl((addrs->address[0] << 24) |
 725             (addrs->address[1] << 16) | (addrs->address[2] << 8) |
 726             (addrs->address[3] << 0));
 727         sa.sin_port = htons(addrs->address[4]) << 8 |
 728              htons(addrs->address[5]) << 0;
 729
 730         if (connect(addrs->socket, (struct sockaddr *)&sa, sa.sin_len) == -1) {
 731                 syslog(LOG_ERR, "connect(%s,%u): %m",
 732                     inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
 733                 (void)close(addrs->socket);
 734                 return (SNMP_ERR_GENERR);
 735         }
 736
 737         addrs->status = RowStatus_active;
 738
 739         return (SNMP_ERR_NOERROR);
 740 }
 741
 742 int
 743 target_delete_address(struct target_address *addrs)
 744 {
 745         SLIST_REMOVE(&target_addresslist, addrs, target_address, ta);
 746         if (addrs->status == RowStatus_active)
 747                 close(addrs->socket);
 748         free(addrs);
 749
 750         return (0);
 751 }
 752
 753 struct target_param *
 754 target_first_param(void)
 755 {
 756         return (SLIST_FIRST(&target_paramlist));
 757 }
 758
 759 struct target_param *
 760 target_next_param(struct target_param *param)
 761 {
 762         if (param == NULL)
 763                 return (NULL);
 764
 765         return (SLIST_NEXT(param, tp));
 766 }
 767
 768 struct target_param *
 769 target_new_param(char *pname)
 770 {
 771         int cmp;
 772         struct target_param *param, *temp, *prev;
 773
 774         SLIST_FOREACH(param, &target_paramlist, tp)
 775                 if (strcmp(pname, param->name) == 0)
 776                         return (NULL);
 777
 778         if ((param = (struct target_param *)malloc(sizeof(*param))) == NULL)
 779                 return (NULL);
 780
 781         memset(param, 0, sizeof(*param));
 782         strlcpy(param->name, pname, sizeof(param->name));
 783
 784         if ((prev = SLIST_FIRST(&target_paramlist)) == NULL ||
 785             strcmp(pname, prev->name) < 0) {
 786                 SLIST_INSERT_HEAD(&target_paramlist, param, tp);
 787                 return (param);
 788         }
 789
 790         SLIST_FOREACH(temp, &target_paramlist, tp) {
 791                 if ((cmp = strcmp(pname, temp->name)) <= 0)
 792                         break;
 793                 prev = temp;
 794         }
 795
 796         if (temp == NULL || cmp < 0)
 797                 SLIST_INSERT_AFTER(prev, param, tp);
 798         else if (cmp > 0)
 799                 SLIST_INSERT_AFTER(temp, param, tp);
 800         else {
 801                 syslog(LOG_ERR, "Target parameter %s exists", param->name);
 802                 free(param);
 803                 return (NULL);
 804         }
 805
 806         return (param);
 807 }
 808
 809 int
 810 target_delete_param(struct target_param *param)
 811 {
 812         SLIST_REMOVE(&target_paramlist, param, target_param, tp);
 813         free(param);
 814
 815         return (0);
 816 }
 817
 818 struct target_notify *
 819 target_first_notify(void)
 820 {
 821         return (SLIST_FIRST(&target_notifylist));
 822 }
 823
 824 struct target_notify *
 825 target_next_notify(struct target_notify *notify)
 826 {
 827         if (notify == NULL)
 828                 return (NULL);
 829
 830         return (SLIST_NEXT(notify, tn));
 831 }
 832
 833 struct target_notify *
 834 target_new_notify(char *nname)
 835 {
 836         int cmp;
 837         struct target_notify *notify, *temp, *prev;
 838
 839         SLIST_FOREACH(notify, &target_notifylist, tn)
 840                 if (strcmp(nname, notify->name) == 0)
 841                         return (NULL);
 842
 843         if ((notify = (struct target_notify *)malloc(sizeof(*notify))) == NULL)
 844                 return (NULL);
 845
 846         memset(notify, 0, sizeof(*notify));
 847         strlcpy(notify->name, nname, sizeof(notify->name));
 848
 849         if ((prev = SLIST_FIRST(&target_notifylist)) == NULL ||
 850             strcmp(nname, prev->name) < 0) {
 851                 SLIST_INSERT_HEAD(&target_notifylist, notify, tn);
 852                 return (notify);
 853         }
 854
 855         SLIST_FOREACH(temp, &target_notifylist, tn) {
 856                 if ((cmp = strcmp(nname, temp->name)) <= 0)
 857                         break;
 858                 prev = temp;
 859         }
 860
 861         if (temp == NULL || cmp < 0)
 862                 SLIST_INSERT_AFTER(prev, notify, tn);
 863         else if (cmp > 0)
 864                 SLIST_INSERT_AFTER(temp, notify, tn);
 865         else {
 866                 syslog(LOG_ERR, "Notification target %s exists", notify->name);
 867                 free(notify);
 868                 return (NULL);
 869         }
 870
 871         return (notify);
 872 }
 873
 874 int
 875 target_delete_notify(struct target_notify *notify)
 876 {
 877         SLIST_REMOVE(&target_notifylist, notify, target_notify, tn);
 878         free(notify);
 879
 880         return (0);
 881 }
 882
 883 void
 884 target_flush_all(void)
 885 {
 886         struct target_address *addrs;
 887         struct target_param *param;
 888         struct target_notify *notify;
 889
 890         while ((addrs = SLIST_FIRST(&target_addresslist)) != NULL) {
 891                 SLIST_REMOVE_HEAD(&target_addresslist, ta);
 892                 if (addrs->status == RowStatus_active)
 893                         close(addrs->socket);
 894                 free(addrs);
 895         }
 896         SLIST_INIT(&target_addresslist);
 897
 898         while ((param = SLIST_FIRST(&target_paramlist)) != NULL) {
 899                 SLIST_REMOVE_HEAD(&target_paramlist, tp);
 900                 free(param);
 901         }
 902         SLIST_INIT(&target_paramlist);
 903
 904         while ((notify = SLIST_FIRST(&target_notifylist)) != NULL) {
 905                 SLIST_REMOVE_HEAD(&target_notifylist, tn);
 906                 free(notify);
 907         }
 908         SLIST_INIT(&target_notifylist);
 909 }