usr.sbin/ctld/ctld.c

   1 /*-
   2  * Copyright (c) 2012 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Edward Tomasz Napierala under sponsorship
   6  * from the FreeBSD Foundation.
   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 THE 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 THE 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  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/types.h>
  35 #include <sys/time.h>
  36 #include <sys/socket.h>
  37 #include <sys/stat.h>
  38 #include <sys/wait.h>
  39 #include <netinet/in.h>
  40 #include <arpa/inet.h>
  41 #include <assert.h>
  42 #include <ctype.h>
  43 #include <errno.h>
  44 #include <netdb.h>
  45 #include <signal.h>
  46 #include <stdbool.h>
  47 #include <stdio.h>
  48 #include <stdint.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52
  53 #include "ctld.h"
  54 #include "isns.h"
  55
  56 bool proxy_mode = false;
  57
  58 static volatile bool sighup_received = false;
  59 static volatile bool sigterm_received = false;
  60 static volatile bool sigalrm_received = false;
  61
  62 static int nchildren = 0;
  63 static uint16_t last_portal_group_tag = 0xff;
  64
  65 static void
  66 usage(void)
  67 {
  68
  69         fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n");
  70         exit(1);
  71 }
  72
  73 char *
  74 checked_strdup(const char *s)
  75 {
  76         char *c;
  77
  78         c = strdup(s);
  79         if (c == NULL)
  80                 log_err(1, "strdup");
  81         return (c);
  82 }
  83
  84 struct conf *
  85 conf_new(void)
  86 {
  87         struct conf *conf;
  88
  89         conf = calloc(1, sizeof(*conf));
  90         if (conf == NULL)
  91                 log_err(1, "calloc");
  92         TAILQ_INIT(&conf->conf_luns);
  93         TAILQ_INIT(&conf->conf_targets);
  94         TAILQ_INIT(&conf->conf_auth_groups);
  95         TAILQ_INIT(&conf->conf_ports);
  96         TAILQ_INIT(&conf->conf_portal_groups);
  97         TAILQ_INIT(&conf->conf_pports);
  98         TAILQ_INIT(&conf->conf_isns);
  99
 100         conf->conf_isns_period = 900;
 101         conf->conf_isns_timeout = 5;
 102         conf->conf_debug = 0;
 103         conf->conf_timeout = 60;
 104         conf->conf_maxproc = 30;
 105
 106         return (conf);
 107 }
 108
 109 void
 110 conf_delete(struct conf *conf)
 111 {
 112         struct lun *lun, *ltmp;
 113         struct target *targ, *tmp;
 114         struct auth_group *ag, *cagtmp;
 115         struct portal_group *pg, *cpgtmp;
 116         struct pport *pp, *pptmp;
 117         struct isns *is, *istmp;
 118
 119         assert(conf->conf_pidfh == NULL);
 120
 121         TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp)
 122                 lun_delete(lun);
 123         TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
 124                 target_delete(targ);
 125         TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
 126                 auth_group_delete(ag);
 127         TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
 128                 portal_group_delete(pg);
 129         TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp)
 130                 pport_delete(pp);
 131         TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
 132                 isns_delete(is);
 133         assert(TAILQ_EMPTY(&conf->conf_ports));
 134         free(conf->conf_pidfile_path);
 135         free(conf);
 136 }
 137
 138 static struct auth *
 139 auth_new(struct auth_group *ag)
 140 {
 141         struct auth *auth;
 142
 143         auth = calloc(1, sizeof(*auth));
 144         if (auth == NULL)
 145                 log_err(1, "calloc");
 146         auth->a_auth_group = ag;
 147         TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
 148         return (auth);
 149 }
 150
 151 static void
 152 auth_delete(struct auth *auth)
 153 {
 154         TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
 155
 156         free(auth->a_user);
 157         free(auth->a_secret);
 158         free(auth->a_mutual_user);
 159         free(auth->a_mutual_secret);
 160         free(auth);
 161 }
 162
 163 const struct auth *
 164 auth_find(const struct auth_group *ag, const char *user)
 165 {
 166         const struct auth *auth;
 167
 168         TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
 169                 if (strcmp(auth->a_user, user) == 0)
 170                         return (auth);
 171         }
 172
 173         return (NULL);
 174 }
 175
 176 static void
 177 auth_check_secret_length(struct auth *auth)
 178 {
 179         size_t len;
 180
 181         len = strlen(auth->a_secret);
 182         if (len > 16) {
 183                 if (auth->a_auth_group->ag_name != NULL)
 184                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 185                             "is too long; it should be at most 16 characters "
 186                             "long", auth->a_user, auth->a_auth_group->ag_name);
 187                 else
 188                         log_warnx("secret for user \"%s\", target \"%s\", "
 189                             "is too long; it should be at most 16 characters "
 190                             "long", auth->a_user,
 191                             auth->a_auth_group->ag_target->t_name);
 192         }
 193         if (len < 12) {
 194                 if (auth->a_auth_group->ag_name != NULL)
 195                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 196                             "is too short; it should be at least 12 characters "
 197                             "long", auth->a_user,
 198                             auth->a_auth_group->ag_name);
 199                 else
 200                         log_warnx("secret for user \"%s\", target \"%s\", "
 201                             "is too short; it should be at least 12 characters "
 202                             "long", auth->a_user,
 203                             auth->a_auth_group->ag_target->t_name);
 204         }
 205
 206         if (auth->a_mutual_secret != NULL) {
 207                 len = strlen(auth->a_mutual_secret);
 208                 if (len > 16) {
 209                         if (auth->a_auth_group->ag_name != NULL)
 210                                 log_warnx("mutual secret for user \"%s\", "
 211                                     "auth-group \"%s\", is too long; it should "
 212                                     "be at most 16 characters long",
 213                                     auth->a_user, auth->a_auth_group->ag_name);
 214                         else
 215                                 log_warnx("mutual secret for user \"%s\", "
 216                                     "target \"%s\", is too long; it should "
 217                                     "be at most 16 characters long",
 218                                     auth->a_user,
 219                                     auth->a_auth_group->ag_target->t_name);
 220                 }
 221                 if (len < 12) {
 222                         if (auth->a_auth_group->ag_name != NULL)
 223                                 log_warnx("mutual secret for user \"%s\", "
 224                                     "auth-group \"%s\", is too short; it "
 225                                     "should be at least 12 characters long",
 226                                     auth->a_user, auth->a_auth_group->ag_name);
 227                         else
 228                                 log_warnx("mutual secret for user \"%s\", "
 229                                     "target \"%s\", is too short; it should be "
 230                                     "at least 12 characters long",
 231                                     auth->a_user,
 232                                     auth->a_auth_group->ag_target->t_name);
 233                 }
 234         }
 235 }
 236
 237 const struct auth *
 238 auth_new_chap(struct auth_group *ag, const char *user,
 239     const char *secret)
 240 {
 241         struct auth *auth;
 242
 243         if (ag->ag_type == AG_TYPE_UNKNOWN)
 244                 ag->ag_type = AG_TYPE_CHAP;
 245         if (ag->ag_type != AG_TYPE_CHAP) {
 246                 if (ag->ag_name != NULL)
 247                         log_warnx("cannot mix \"chap\" authentication with "
 248                             "other types for auth-group \"%s\"", ag->ag_name);
 249                 else
 250                         log_warnx("cannot mix \"chap\" authentication with "
 251                             "other types for target \"%s\"",
 252                             ag->ag_target->t_name);
 253                 return (NULL);
 254         }
 255
 256         auth = auth_new(ag);
 257         auth->a_user = checked_strdup(user);
 258         auth->a_secret = checked_strdup(secret);
 259
 260         auth_check_secret_length(auth);
 261
 262         return (auth);
 263 }
 264
 265 const struct auth *
 266 auth_new_chap_mutual(struct auth_group *ag, const char *user,
 267     const char *secret, const char *user2, const char *secret2)
 268 {
 269         struct auth *auth;
 270
 271         if (ag->ag_type == AG_TYPE_UNKNOWN)
 272                 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
 273         if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
 274                 if (ag->ag_name != NULL)
 275                         log_warnx("cannot mix \"chap-mutual\" authentication "
 276                             "with other types for auth-group \"%s\"",
 277                             ag->ag_name);
 278                 else
 279                         log_warnx("cannot mix \"chap-mutual\" authentication "
 280                             "with other types for target \"%s\"",
 281                             ag->ag_target->t_name);
 282                 return (NULL);
 283         }
 284
 285         auth = auth_new(ag);
 286         auth->a_user = checked_strdup(user);
 287         auth->a_secret = checked_strdup(secret);
 288         auth->a_mutual_user = checked_strdup(user2);
 289         auth->a_mutual_secret = checked_strdup(secret2);
 290
 291         auth_check_secret_length(auth);
 292
 293         return (auth);
 294 }
 295
 296 const struct auth_name *
 297 auth_name_new(struct auth_group *ag, const char *name)
 298 {
 299         struct auth_name *an;
 300
 301         an = calloc(1, sizeof(*an));
 302         if (an == NULL)
 303                 log_err(1, "calloc");
 304         an->an_auth_group = ag;
 305         an->an_initator_name = checked_strdup(name);
 306         TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
 307         return (an);
 308 }
 309
 310 static void
 311 auth_name_delete(struct auth_name *an)
 312 {
 313         TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
 314
 315         free(an->an_initator_name);
 316         free(an);
 317 }
 318
 319 bool
 320 auth_name_defined(const struct auth_group *ag)
 321 {
 322         if (TAILQ_EMPTY(&ag->ag_names))
 323                 return (false);
 324         return (true);
 325 }
 326
 327 const struct auth_name *
 328 auth_name_find(const struct auth_group *ag, const char *name)
 329 {
 330         const struct auth_name *auth_name;
 331
 332         TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
 333                 if (strcmp(auth_name->an_initator_name, name) == 0)
 334                         return (auth_name);
 335         }
 336
 337         return (NULL);
 338 }
 339
 340 int
 341 auth_name_check(const struct auth_group *ag, const char *initiator_name)
 342 {
 343         if (!auth_name_defined(ag))
 344                 return (0);
 345
 346         if (auth_name_find(ag, initiator_name) == NULL)
 347                 return (1);
 348
 349         return (0);
 350 }
 351
 352 const struct auth_portal *
 353 auth_portal_new(struct auth_group *ag, const char *portal)
 354 {
 355         struct auth_portal *ap;
 356         char *net, *mask, *str, *tmp;
 357         int len, dm, m;
 358
 359         ap = calloc(1, sizeof(*ap));
 360         if (ap == NULL)
 361                 log_err(1, "calloc");
 362         ap->ap_auth_group = ag;
 363         ap->ap_initator_portal = checked_strdup(portal);
 364         mask = str = checked_strdup(portal);
 365         net = strsep(&mask, "/");
 366         if (net[0] == '[')
 367                 net++;
 368         len = strlen(net);
 369         if (len == 0)
 370                 goto error;
 371         if (net[len - 1] == ']')
 372                 net[len - 1] = 0;
 373         if (strchr(net, ':') != NULL) {
 374                 struct sockaddr_in6 *sin6 =
 375                     (struct sockaddr_in6 *)&ap->ap_sa;
 376
 377                 sin6->sin6_len = sizeof(*sin6);
 378                 sin6->sin6_family = AF_INET6;
 379                 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
 380                         goto error;
 381                 dm = 128;
 382         } else {
 383                 struct sockaddr_in *sin =
 384                     (struct sockaddr_in *)&ap->ap_sa;
 385
 386                 sin->sin_len = sizeof(*sin);
 387                 sin->sin_family = AF_INET;
 388                 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
 389                         goto error;
 390                 dm = 32;
 391         }
 392         if (mask != NULL) {
 393                 m = strtol(mask, &tmp, 0);
 394                 if (m < 0 || m > dm || tmp[0] != 0)
 395                         goto error;
 396         } else
 397                 m = dm;
 398         ap->ap_mask = m;
 399         free(str);
 400         TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
 401         return (ap);
 402
 403 error:
 404         free(str);
 405         free(ap);
 406         log_warnx("incorrect initiator portal \"%s\"", portal);
 407         return (NULL);
 408 }
 409
 410 static void
 411 auth_portal_delete(struct auth_portal *ap)
 412 {
 413         TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
 414
 415         free(ap->ap_initator_portal);
 416         free(ap);
 417 }
 418
 419 bool
 420 auth_portal_defined(const struct auth_group *ag)
 421 {
 422         if (TAILQ_EMPTY(&ag->ag_portals))
 423                 return (false);
 424         return (true);
 425 }
 426
 427 const struct auth_portal *
 428 auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
 429 {
 430         const struct auth_portal *ap;
 431         const uint8_t *a, *b;
 432         int i;
 433         uint8_t bmask;
 434
 435         TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
 436                 if (ap->ap_sa.ss_family != ss->ss_family)
 437                         continue;
 438                 if (ss->ss_family == AF_INET) {
 439                         a = (const uint8_t *)
 440                             &((const struct sockaddr_in *)ss)->sin_addr;
 441                         b = (const uint8_t *)
 442                             &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
 443                 } else {
 444                         a = (const uint8_t *)
 445                             &((const struct sockaddr_in6 *)ss)->sin6_addr;
 446                         b = (const uint8_t *)
 447                             &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
 448                 }
 449                 for (i = 0; i < ap->ap_mask / 8; i++) {
 450                         if (a[i] != b[i])
 451                                 goto next;
 452                 }
 453                 if (ap->ap_mask % 8) {
 454                         bmask = 0xff << (8 - (ap->ap_mask % 8));
 455                         if ((a[i] & bmask) != (b[i] & bmask))
 456                                 goto next;
 457                 }
 458                 return (ap);
 459 next:
 460                 ;
 461         }
 462
 463         return (NULL);
 464 }
 465
 466 int
 467 auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa)
 468 {
 469
 470         if (!auth_portal_defined(ag))
 471                 return (0);
 472
 473         if (auth_portal_find(ag, sa) == NULL)
 474                 return (1);
 475
 476         return (0);
 477 }
 478
 479 struct auth_group *
 480 auth_group_new(struct conf *conf, const char *name)
 481 {
 482         struct auth_group *ag;
 483
 484         if (name != NULL) {
 485                 ag = auth_group_find(conf, name);
 486                 if (ag != NULL) {
 487                         log_warnx("duplicated auth-group \"%s\"", name);
 488                         return (NULL);
 489                 }
 490         }
 491
 492         ag = calloc(1, sizeof(*ag));
 493         if (ag == NULL)
 494                 log_err(1, "calloc");
 495         if (name != NULL)
 496                 ag->ag_name = checked_strdup(name);
 497         TAILQ_INIT(&ag->ag_auths);
 498         TAILQ_INIT(&ag->ag_names);
 499         TAILQ_INIT(&ag->ag_portals);
 500         ag->ag_conf = conf;
 501         TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
 502
 503         return (ag);
 504 }
 505
 506 void
 507 auth_group_delete(struct auth_group *ag)
 508 {
 509         struct auth *auth, *auth_tmp;
 510         struct auth_name *auth_name, *auth_name_tmp;
 511         struct auth_portal *auth_portal, *auth_portal_tmp;
 512
 513         TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
 514
 515         TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
 516                 auth_delete(auth);
 517         TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
 518                 auth_name_delete(auth_name);
 519         TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
 520             auth_portal_tmp)
 521                 auth_portal_delete(auth_portal);
 522         free(ag->ag_name);
 523         free(ag);
 524 }
 525
 526 struct auth_group *
 527 auth_group_find(const struct conf *conf, const char *name)
 528 {
 529         struct auth_group *ag;
 530
 531         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
 532                 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
 533                         return (ag);
 534         }
 535
 536         return (NULL);
 537 }
 538
 539 int
 540 auth_group_set_type(struct auth_group *ag, const char *str)
 541 {
 542         int type;
 543
 544         if (strcmp(str, "none") == 0) {
 545                 type = AG_TYPE_NO_AUTHENTICATION;
 546         } else if (strcmp(str, "deny") == 0) {
 547                 type = AG_TYPE_DENY;
 548         } else if (strcmp(str, "chap") == 0) {
 549                 type = AG_TYPE_CHAP;
 550         } else if (strcmp(str, "chap-mutual") == 0) {
 551                 type = AG_TYPE_CHAP_MUTUAL;
 552         } else {
 553                 if (ag->ag_name != NULL)
 554                         log_warnx("invalid auth-type \"%s\" for auth-group "
 555                             "\"%s\"", str, ag->ag_name);
 556                 else
 557                         log_warnx("invalid auth-type \"%s\" for target "
 558                             "\"%s\"", str, ag->ag_target->t_name);
 559                 return (1);
 560         }
 561
 562         if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) {
 563                 if (ag->ag_name != NULL) {
 564                         log_warnx("cannot set auth-type to \"%s\" for "
 565                             "auth-group \"%s\"; already has a different "
 566                             "type", str, ag->ag_name);
 567                 } else {
 568                         log_warnx("cannot set auth-type to \"%s\" for target "
 569                             "\"%s\"; already has a different type",
 570                             str, ag->ag_target->t_name);
 571                 }
 572                 return (1);
 573         }
 574
 575         ag->ag_type = type;
 576
 577         return (0);
 578 }
 579
 580 static struct portal *
 581 portal_new(struct portal_group *pg)
 582 {
 583         struct portal *portal;
 584
 585         portal = calloc(1, sizeof(*portal));
 586         if (portal == NULL)
 587                 log_err(1, "calloc");
 588         TAILQ_INIT(&portal->p_targets);
 589         portal->p_portal_group = pg;
 590         TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
 591         return (portal);
 592 }
 593
 594 static void
 595 portal_delete(struct portal *portal)
 596 {
 597
 598         TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
 599         if (portal->p_ai != NULL)
 600                 freeaddrinfo(portal->p_ai);
 601         free(portal->p_listen);
 602         free(portal);
 603 }
 604
 605 struct portal_group *
 606 portal_group_new(struct conf *conf, const char *name)
 607 {
 608         struct portal_group *pg;
 609
 610         pg = portal_group_find(conf, name);
 611         if (pg != NULL) {
 612                 log_warnx("duplicated portal-group \"%s\"", name);
 613                 return (NULL);
 614         }
 615
 616         pg = calloc(1, sizeof(*pg));
 617         if (pg == NULL)
 618                 log_err(1, "calloc");
 619         pg->pg_name = checked_strdup(name);
 620         TAILQ_INIT(&pg->pg_options);
 621         TAILQ_INIT(&pg->pg_portals);
 622         TAILQ_INIT(&pg->pg_ports);
 623         pg->pg_conf = conf;
 624         pg->pg_tag = 0;         /* Assigned later in conf_apply(). */
 625         TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
 626
 627         return (pg);
 628 }
 629
 630 void
 631 portal_group_delete(struct portal_group *pg)
 632 {
 633         struct portal *portal, *tmp;
 634         struct port *port, *tport;
 635         struct option *o, *otmp;
 636
 637         TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
 638                 port_delete(port);
 639         TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
 640
 641         TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
 642                 portal_delete(portal);
 643         TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp)
 644                 option_delete(&pg->pg_options, o);
 645         free(pg->pg_name);
 646         free(pg->pg_offload);
 647         free(pg->pg_redirection);
 648         free(pg);
 649 }
 650
 651 struct portal_group *
 652 portal_group_find(const struct conf *conf, const char *name)
 653 {
 654         struct portal_group *pg;
 655
 656         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 657                 if (strcmp(pg->pg_name, name) == 0)
 658                         return (pg);
 659         }
 660
 661         return (NULL);
 662 }
 663
 664 static int
 665 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
 666 {
 667         struct addrinfo hints;
 668         char *str, *addr, *ch;
 669         const char *port;
 670         int error, colons = 0;
 671
 672         str = arg = strdup(arg);
 673         if (arg[0] == '[') {
 674                 /*
 675                  * IPv6 address in square brackets, perhaps with port.
 676                  */
 677                 arg++;
 678                 addr = strsep(&arg, "]");
 679                 if (arg == NULL) {
 680                         free(str);
 681                         return (1);
 682                 }
 683                 if (arg[0] == '\0') {
 684                         port = def_port;
 685                 } else if (arg[0] == ':') {
 686                         port = arg + 1;
 687                 } else {
 688                         free(str);
 689                         return (1);
 690                 }
 691         } else {
 692                 /*
 693                  * Either IPv6 address without brackets - and without
 694                  * a port - or IPv4 address.  Just count the colons.
 695                  */
 696                 for (ch = arg; *ch != '\0'; ch++) {
 697                         if (*ch == ':')
 698                                 colons++;
 699                 }
 700                 if (colons > 1) {
 701                         addr = arg;
 702                         port = def_port;
 703                 } else {
 704                         addr = strsep(&arg, ":");
 705                         if (arg == NULL)
 706                                 port = def_port;
 707                         else
 708                                 port = arg;
 709                 }
 710         }
 711
 712         memset(&hints, 0, sizeof(hints));
 713         hints.ai_family = PF_UNSPEC;
 714         hints.ai_socktype = SOCK_STREAM;
 715         hints.ai_flags = AI_PASSIVE;
 716         error = getaddrinfo(addr, port, &hints, ai);
 717         free(str);
 718         return ((error != 0) ? 1 : 0);
 719 }
 720
 721 int
 722 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
 723 {
 724         struct portal *portal;
 725
 726         portal = portal_new(pg);
 727         portal->p_listen = checked_strdup(value);
 728         portal->p_iser = iser;
 729
 730         if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
 731                 log_warnx("invalid listen address %s", portal->p_listen);
 732                 portal_delete(portal);
 733                 return (1);
 734         }
 735
 736         /*
 737          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 738          *      those into multiple portals.
 739          */
 740
 741         return (0);
 742 }
 743
 744 int
 745 isns_new(struct conf *conf, const char *addr)
 746 {
 747         struct isns *isns;
 748
 749         isns = calloc(1, sizeof(*isns));
 750         if (isns == NULL)
 751                 log_err(1, "calloc");
 752         isns->i_conf = conf;
 753         TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
 754         isns->i_addr = checked_strdup(addr);
 755
 756         if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
 757                 log_warnx("invalid iSNS address %s", isns->i_addr);
 758                 isns_delete(isns);
 759                 return (1);
 760         }
 761
 762         /*
 763          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 764          *      those into multiple servers.
 765          */
 766
 767         return (0);
 768 }
 769
 770 void
 771 isns_delete(struct isns *isns)
 772 {
 773
 774         TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
 775         free(isns->i_addr);
 776         if (isns->i_ai != NULL)
 777                 freeaddrinfo(isns->i_ai);
 778         free(isns);
 779 }
 780
 781 static int
 782 isns_do_connect(struct isns *isns)
 783 {
 784         int s;
 785
 786         s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
 787             isns->i_ai->ai_protocol);
 788         if (s < 0) {
 789                 log_warn("socket(2) failed for %s", isns->i_addr);
 790                 return (-1);
 791         }
 792         if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
 793                 log_warn("connect(2) failed for %s", isns->i_addr);
 794                 close(s);
 795                 return (-1);
 796         }
 797         return(s);
 798 }
 799
 800 static int
 801 isns_do_register(struct isns *isns, int s, const char *hostname)
 802 {
 803         struct conf *conf = isns->i_conf;
 804         struct target *target;
 805         struct portal *portal;
 806         struct portal_group *pg;
 807         struct port *port;
 808         struct isns_req *req;
 809         int res = 0;
 810         uint32_t error;
 811
 812         req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
 813         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 814         isns_req_add_delim(req);
 815         isns_req_add_str(req, 1, hostname);
 816         isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
 817         isns_req_add_32(req, 6, conf->conf_isns_period);
 818         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 819                 if (pg->pg_unassigned)
 820                         continue;
 821                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 822                         isns_req_add_addr(req, 16, portal->p_ai);
 823                         isns_req_add_port(req, 17, portal->p_ai);
 824                 }
 825         }
 826         TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
 827                 isns_req_add_str(req, 32, target->t_name);
 828                 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
 829                 if (target->t_alias != NULL)
 830                         isns_req_add_str(req, 34, target->t_alias);
 831                 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
 832                         if ((pg = port->p_portal_group) == NULL)
 833                                 continue;
 834                         isns_req_add_32(req, 51, pg->pg_tag);
 835                         TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 836                                 isns_req_add_addr(req, 49, portal->p_ai);
 837                                 isns_req_add_port(req, 50, portal->p_ai);
 838                         }
 839                 }
 840         }
 841         res = isns_req_send(s, req);
 842         if (res < 0) {
 843                 log_warn("send(2) failed for %s", isns->i_addr);
 844                 goto quit;
 845         }
 846         res = isns_req_receive(s, req);
 847         if (res < 0) {
 848                 log_warn("receive(2) failed for %s", isns->i_addr);
 849                 goto quit;
 850         }
 851         error = isns_req_get_status(req);
 852         if (error != 0) {
 853                 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
 854                 res = -1;
 855         }
 856 quit:
 857         isns_req_free(req);
 858         return (res);
 859 }
 860
 861 static int
 862 isns_do_check(struct isns *isns, int s, const char *hostname)
 863 {
 864         struct conf *conf = isns->i_conf;
 865         struct isns_req *req;
 866         int res = 0;
 867         uint32_t error;
 868
 869         req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
 870         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 871         isns_req_add_str(req, 1, hostname);
 872         isns_req_add_delim(req);
 873         isns_req_add(req, 2, 0, NULL);
 874         res = isns_req_send(s, req);
 875         if (res < 0) {
 876                 log_warn("send(2) failed for %s", isns->i_addr);
 877                 goto quit;
 878         }
 879         res = isns_req_receive(s, req);
 880         if (res < 0) {
 881                 log_warn("receive(2) failed for %s", isns->i_addr);
 882                 goto quit;
 883         }
 884         error = isns_req_get_status(req);
 885         if (error != 0) {
 886                 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
 887                 res = -1;
 888         }
 889 quit:
 890         isns_req_free(req);
 891         return (res);
 892 }
 893
 894 static int
 895 isns_do_deregister(struct isns *isns, int s, const char *hostname)
 896 {
 897         struct conf *conf = isns->i_conf;
 898         struct isns_req *req;
 899         int res = 0;
 900         uint32_t error;
 901
 902         req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
 903         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 904         isns_req_add_delim(req);
 905         isns_req_add_str(req, 1, hostname);
 906         res = isns_req_send(s, req);
 907         if (res < 0) {
 908                 log_warn("send(2) failed for %s", isns->i_addr);
 909                 goto quit;
 910         }
 911         res = isns_req_receive(s, req);
 912         if (res < 0) {
 913                 log_warn("receive(2) failed for %s", isns->i_addr);
 914                 goto quit;
 915         }
 916         error = isns_req_get_status(req);
 917         if (error != 0) {
 918                 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
 919                 res = -1;
 920         }
 921 quit:
 922         isns_req_free(req);
 923         return (res);
 924 }
 925
 926 void
 927 isns_register(struct isns *isns, struct isns *oldisns)
 928 {
 929         struct conf *conf = isns->i_conf;
 930         int s;
 931         char hostname[256];
 932
 933         if (TAILQ_EMPTY(&conf->conf_targets) ||
 934             TAILQ_EMPTY(&conf->conf_portal_groups))
 935                 return;
 936         set_timeout(conf->conf_isns_timeout, false);
 937         s = isns_do_connect(isns);
 938         if (s < 0) {
 939                 set_timeout(0, false);
 940                 return;
 941         }
 942         gethostname(hostname, sizeof(hostname));
 943
 944         if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
 945                 oldisns = isns;
 946         isns_do_deregister(oldisns, s, hostname);
 947         isns_do_register(isns, s, hostname);
 948         close(s);
 949         set_timeout(0, false);
 950 }
 951
 952 void
 953 isns_check(struct isns *isns)
 954 {
 955         struct conf *conf = isns->i_conf;
 956         int s, res;
 957         char hostname[256];
 958
 959         if (TAILQ_EMPTY(&conf->conf_targets) ||
 960             TAILQ_EMPTY(&conf->conf_portal_groups))
 961                 return;
 962         set_timeout(conf->conf_isns_timeout, false);
 963         s = isns_do_connect(isns);
 964         if (s < 0) {
 965                 set_timeout(0, false);
 966                 return;
 967         }
 968         gethostname(hostname, sizeof(hostname));
 969
 970         res = isns_do_check(isns, s, hostname);
 971         if (res < 0) {
 972                 isns_do_deregister(isns, s, hostname);
 973                 isns_do_register(isns, s, hostname);
 974         }
 975         close(s);
 976         set_timeout(0, false);
 977 }
 978
 979 void
 980 isns_deregister(struct isns *isns)
 981 {
 982         struct conf *conf = isns->i_conf;
 983         int s;
 984         char hostname[256];
 985
 986         if (TAILQ_EMPTY(&conf->conf_targets) ||
 987             TAILQ_EMPTY(&conf->conf_portal_groups))
 988                 return;
 989         set_timeout(conf->conf_isns_timeout, false);
 990         s = isns_do_connect(isns);
 991         if (s < 0)
 992                 return;
 993         gethostname(hostname, sizeof(hostname));
 994
 995         isns_do_deregister(isns, s, hostname);
 996         close(s);
 997         set_timeout(0, false);
 998 }
 999
1000 int
1001 portal_group_set_filter(struct portal_group *pg, const char *str)
1002 {
1003         int filter;
1004
1005         if (strcmp(str, "none") == 0) {
1006                 filter = PG_FILTER_NONE;
1007         } else if (strcmp(str, "portal") == 0) {
1008                 filter = PG_FILTER_PORTAL;
1009         } else if (strcmp(str, "portal-name") == 0) {
1010                 filter = PG_FILTER_PORTAL_NAME;
1011         } else if (strcmp(str, "portal-name-auth") == 0) {
1012                 filter = PG_FILTER_PORTAL_NAME_AUTH;
1013         } else {
1014                 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1015                     "\"%s\"; valid values are \"none\", \"portal\", "
1016                     "\"portal-name\", and \"portal-name-auth\"",
1017                     str, pg->pg_name);
1018                 return (1);
1019         }
1020
1021         if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1022             pg->pg_discovery_filter != filter) {
1023                 log_warnx("cannot set discovery-filter to \"%s\" for "
1024                     "portal-group \"%s\"; already has a different "
1025                     "value", str, pg->pg_name);
1026                 return (1);
1027         }
1028
1029         pg->pg_discovery_filter = filter;
1030
1031         return (0);
1032 }
1033
1034 int
1035 portal_group_set_offload(struct portal_group *pg, const char *offload)
1036 {
1037
1038         if (pg->pg_offload != NULL) {
1039                 log_warnx("cannot set offload to \"%s\" for "
1040                     "portal-group \"%s\"; already defined",
1041                     offload, pg->pg_name);
1042                 return (1);
1043         }
1044
1045         pg->pg_offload = checked_strdup(offload);
1046
1047         return (0);
1048 }
1049
1050 int
1051 portal_group_set_redirection(struct portal_group *pg, const char *addr)
1052 {
1053
1054         if (pg->pg_redirection != NULL) {
1055                 log_warnx("cannot set redirection to \"%s\" for "
1056                     "portal-group \"%s\"; already defined",
1057                     addr, pg->pg_name);
1058                 return (1);
1059         }
1060
1061         pg->pg_redirection = checked_strdup(addr);
1062
1063         return (0);
1064 }
1065
1066 static bool
1067 valid_hex(const char ch)
1068 {
1069         switch (ch) {
1070         case '0':
1071         case '1':
1072         case '2':
1073         case '3':
1074         case '4':
1075         case '5':
1076         case '6':
1077         case '7':
1078         case '8':
1079         case '9':
1080         case 'a':
1081         case 'A':
1082         case 'b':
1083         case 'B':
1084         case 'c':
1085         case 'C':
1086         case 'd':
1087         case 'D':
1088         case 'e':
1089         case 'E':
1090         case 'f':
1091         case 'F':
1092                 return (true);
1093         default:
1094                 return (false);
1095         }
1096 }
1097
1098 bool
1099 valid_iscsi_name(const char *name)
1100 {
1101         int i;
1102
1103         if (strlen(name) >= MAX_NAME_LEN) {
1104                 log_warnx("overlong name for target \"%s\"; max length allowed "
1105                     "by iSCSI specification is %d characters",
1106                     name, MAX_NAME_LEN);
1107                 return (false);
1108         }
1109
1110         /*
1111          * In the cases below, we don't return an error, just in case the admin
1112          * was right, and we're wrong.
1113          */
1114         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1115                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1116                         /*
1117                          * XXX: We should verify UTF-8 normalisation, as defined
1118                          *      by 3.2.6.2: iSCSI Name Encoding.
1119                          */
1120                         if (isalnum(name[i]))
1121                                 continue;
1122                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1123                                 continue;
1124                         log_warnx("invalid character \"%c\" in target name "
1125                             "\"%s\"; allowed characters are letters, digits, "
1126                             "'-', '.', and ':'", name[i], name);
1127                         break;
1128                 }
1129                 /*
1130                  * XXX: Check more stuff: valid date and a valid reversed domain.
1131                  */
1132         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1133                 if (strlen(name) != strlen("eui.") + 16)
1134                         log_warnx("invalid target name \"%s\"; the \"eui.\" "
1135                             "should be followed by exactly 16 hexadecimal "
1136                             "digits", name);
1137                 for (i = strlen("eui."); name[i] != '\0'; i++) {
1138                         if (!valid_hex(name[i])) {
1139                                 log_warnx("invalid character \"%c\" in target "
1140                                     "name \"%s\"; allowed characters are 1-9 "
1141                                     "and A-F", name[i], name);
1142                                 break;
1143                         }
1144                 }
1145         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1146                 if (strlen(name) > strlen("naa.") + 32)
1147                         log_warnx("invalid target name \"%s\"; the \"naa.\" "
1148                             "should be followed by at most 32 hexadecimal "
1149                             "digits", name);
1150                 for (i = strlen("naa."); name[i] != '\0'; i++) {
1151                         if (!valid_hex(name[i])) {
1152                                 log_warnx("invalid character \"%c\" in target "
1153                                     "name \"%s\"; allowed characters are 1-9 "
1154                                     "and A-F", name[i], name);
1155                                 break;
1156                         }
1157                 }
1158         } else {
1159                 log_warnx("invalid target name \"%s\"; should start with "
1160                     "either \"iqn.\", \"eui.\", or \"naa.\"",
1161                     name);
1162         }
1163         return (true);
1164 }
1165
1166 struct pport *
1167 pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1168 {
1169         struct pport *pp;
1170
1171         pp = calloc(1, sizeof(*pp));
1172         if (pp == NULL)
1173                 log_err(1, "calloc");
1174         pp->pp_conf = conf;
1175         pp->pp_name = checked_strdup(name);
1176         pp->pp_ctl_port = ctl_port;
1177         TAILQ_INIT(&pp->pp_ports);
1178         TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1179         return (pp);
1180 }
1181
1182 struct pport *
1183 pport_find(const struct conf *conf, const char *name)
1184 {
1185         struct pport *pp;
1186
1187         TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1188                 if (strcasecmp(pp->pp_name, name) == 0)
1189                         return (pp);
1190         }
1191         return (NULL);
1192 }
1193
1194 struct pport *
1195 pport_copy(struct pport *pp, struct conf *conf)
1196 {
1197         struct pport *ppnew;
1198
1199         ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1200         return (ppnew);
1201 }
1202
1203 void
1204 pport_delete(struct pport *pp)
1205 {
1206         struct port *port, *tport;
1207
1208         TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1209                 port_delete(port);
1210         TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1211         free(pp->pp_name);
1212         free(pp);
1213 }
1214
1215 struct port *
1216 port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1217 {
1218         struct port *port;
1219         char *name;
1220         int ret;
1221
1222         ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1223         if (ret <= 0)
1224                 log_err(1, "asprintf");
1225         if (port_find(conf, name) != NULL) {
1226                 log_warnx("duplicate port \"%s\"", name);
1227                 free(name);
1228                 return (NULL);
1229         }
1230         port = calloc(1, sizeof(*port));
1231         if (port == NULL)
1232                 log_err(1, "calloc");
1233         port->p_conf = conf;
1234         port->p_name = name;
1235         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1236         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1237         port->p_target = target;
1238         TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1239         port->p_portal_group = pg;
1240         return (port);
1241 }
1242
1243 struct port *
1244 port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1245 {
1246         struct port *port;
1247         char *name;
1248         int ret;
1249
1250         ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1251         if (ret <= 0)
1252                 log_err(1, "asprintf");
1253         if (port_find(conf, name) != NULL) {
1254                 log_warnx("duplicate port \"%s\"", name);
1255                 free(name);
1256                 return (NULL);
1257         }
1258         port = calloc(1, sizeof(*port));
1259         if (port == NULL)
1260                 log_err(1, "calloc");
1261         port->p_conf = conf;
1262         port->p_name = name;
1263         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1264         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1265         port->p_target = target;
1266         TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1267         port->p_pport = pp;
1268         return (port);
1269 }
1270
1271 struct port *
1272 port_find(const struct conf *conf, const char *name)
1273 {
1274         struct port *port;
1275
1276         TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1277                 if (strcasecmp(port->p_name, name) == 0)
1278                         return (port);
1279         }
1280
1281         return (NULL);
1282 }
1283
1284 struct port *
1285 port_find_in_pg(const struct portal_group *pg, const char *target)
1286 {
1287         struct port *port;
1288
1289         TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1290                 if (strcasecmp(port->p_target->t_name, target) == 0)
1291                         return (port);
1292         }
1293
1294         return (NULL);
1295 }
1296
1297 void
1298 port_delete(struct port *port)
1299 {
1300
1301         if (port->p_portal_group)
1302                 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1303         if (port->p_pport)
1304                 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1305         if (port->p_target)
1306                 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1307         TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1308         free(port->p_name);
1309         free(port);
1310 }
1311
1312 int
1313 port_is_dummy(struct port *port)
1314 {
1315
1316         if (port->p_portal_group) {
1317                 if (port->p_portal_group->pg_foreign)
1318                         return (1);
1319                 if (TAILQ_EMPTY(&port->p_portal_group->pg_portals))
1320                         return (1);
1321         }
1322         return (0);
1323 }
1324
1325 struct target *
1326 target_new(struct conf *conf, const char *name)
1327 {
1328         struct target *targ;
1329         int i, len;
1330
1331         targ = target_find(conf, name);
1332         if (targ != NULL) {
1333                 log_warnx("duplicated target \"%s\"", name);
1334                 return (NULL);
1335         }
1336         if (valid_iscsi_name(name) == false) {
1337                 log_warnx("target name \"%s\" is invalid", name);
1338                 return (NULL);
1339         }
1340         targ = calloc(1, sizeof(*targ));
1341         if (targ == NULL)
1342                 log_err(1, "calloc");
1343         targ->t_name = checked_strdup(name);
1344
1345         /*
1346          * RFC 3722 requires us to normalize the name to lowercase.
1347          */
1348         len = strlen(name);
1349         for (i = 0; i < len; i++)
1350                 targ->t_name[i] = tolower(targ->t_name[i]);
1351
1352         targ->t_conf = conf;
1353         TAILQ_INIT(&targ->t_ports);
1354         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1355
1356         return (targ);
1357 }
1358
1359 void
1360 target_delete(struct target *targ)
1361 {
1362         struct port *port, *tport;
1363
1364         TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1365                 port_delete(port);
1366         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1367
1368         free(targ->t_name);
1369         free(targ->t_redirection);
1370         free(targ);
1371 }
1372
1373 struct target *
1374 target_find(struct conf *conf, const char *name)
1375 {
1376         struct target *targ;
1377
1378         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1379                 if (strcasecmp(targ->t_name, name) == 0)
1380                         return (targ);
1381         }
1382
1383         return (NULL);
1384 }
1385
1386 int
1387 target_set_redirection(struct target *target, const char *addr)
1388 {
1389
1390         if (target->t_redirection != NULL) {
1391                 log_warnx("cannot set redirection to \"%s\" for "
1392                     "target \"%s\"; already defined",
1393                     addr, target->t_name);
1394                 return (1);
1395         }
1396
1397         target->t_redirection = checked_strdup(addr);
1398
1399         return (0);
1400 }
1401
1402 struct lun *
1403 lun_new(struct conf *conf, const char *name)
1404 {
1405         struct lun *lun;
1406
1407         lun = lun_find(conf, name);
1408         if (lun != NULL) {
1409                 log_warnx("duplicated lun \"%s\"", name);
1410                 return (NULL);
1411         }
1412
1413         lun = calloc(1, sizeof(*lun));
1414         if (lun == NULL)
1415                 log_err(1, "calloc");
1416         lun->l_conf = conf;
1417         lun->l_name = checked_strdup(name);
1418         TAILQ_INIT(&lun->l_options);
1419         TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1420         lun->l_ctl_lun = -1;
1421
1422         return (lun);
1423 }
1424
1425 void
1426 lun_delete(struct lun *lun)
1427 {
1428         struct target *targ;
1429         struct option *o, *tmp;
1430         int i;
1431
1432         TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1433                 for (i = 0; i < MAX_LUNS; i++) {
1434                         if (targ->t_luns[i] == lun)
1435                                 targ->t_luns[i] = NULL;
1436                 }
1437         }
1438         TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1439
1440         TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp)
1441                 option_delete(&lun->l_options, o);
1442         free(lun->l_name);
1443         free(lun->l_backend);
1444         free(lun->l_device_id);
1445         free(lun->l_path);
1446         free(lun->l_scsiname);
1447         free(lun->l_serial);
1448         free(lun);
1449 }
1450
1451 struct lun *
1452 lun_find(const struct conf *conf, const char *name)
1453 {
1454         struct lun *lun;
1455
1456         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1457                 if (strcmp(lun->l_name, name) == 0)
1458                         return (lun);
1459         }
1460
1461         return (NULL);
1462 }
1463
1464 void
1465 lun_set_backend(struct lun *lun, const char *value)
1466 {
1467         free(lun->l_backend);
1468         lun->l_backend = checked_strdup(value);
1469 }
1470
1471 void
1472 lun_set_blocksize(struct lun *lun, size_t value)
1473 {
1474
1475         lun->l_blocksize = value;
1476 }
1477
1478 void
1479 lun_set_device_type(struct lun *lun, uint8_t value)
1480 {
1481
1482         lun->l_device_type = value;
1483 }
1484
1485 void
1486 lun_set_device_id(struct lun *lun, const char *value)
1487 {
1488         free(lun->l_device_id);
1489         lun->l_device_id = checked_strdup(value);
1490 }
1491
1492 void
1493 lun_set_path(struct lun *lun, const char *value)
1494 {
1495         free(lun->l_path);
1496         lun->l_path = checked_strdup(value);
1497 }
1498
1499 void
1500 lun_set_scsiname(struct lun *lun, const char *value)
1501 {
1502         free(lun->l_scsiname);
1503         lun->l_scsiname = checked_strdup(value);
1504 }
1505
1506 void
1507 lun_set_serial(struct lun *lun, const char *value)
1508 {
1509         free(lun->l_serial);
1510         lun->l_serial = checked_strdup(value);
1511 }
1512
1513 void
1514 lun_set_size(struct lun *lun, size_t value)
1515 {
1516
1517         lun->l_size = value;
1518 }
1519
1520 void
1521 lun_set_ctl_lun(struct lun *lun, uint32_t value)
1522 {
1523
1524         lun->l_ctl_lun = value;
1525 }
1526
1527 struct option *
1528 option_new(struct options *options, const char *name, const char *value)
1529 {
1530         struct option *o;
1531
1532         o = option_find(options, name);
1533         if (o != NULL) {
1534                 log_warnx("duplicated option \"%s\"", name);
1535                 return (NULL);
1536         }
1537
1538         o = calloc(1, sizeof(*o));
1539         if (o == NULL)
1540                 log_err(1, "calloc");
1541         o->o_name = checked_strdup(name);
1542         o->o_value = checked_strdup(value);
1543         TAILQ_INSERT_TAIL(options, o, o_next);
1544
1545         return (o);
1546 }
1547
1548 void
1549 option_delete(struct options *options, struct option *o)
1550 {
1551
1552         TAILQ_REMOVE(options, o, o_next);
1553         free(o->o_name);
1554         free(o->o_value);
1555         free(o);
1556 }
1557
1558 struct option *
1559 option_find(const struct options *options, const char *name)
1560 {
1561         struct option *o;
1562
1563         TAILQ_FOREACH(o, options, o_next) {
1564                 if (strcmp(o->o_name, name) == 0)
1565                         return (o);
1566         }
1567
1568         return (NULL);
1569 }
1570
1571 void
1572 option_set(struct option *o, const char *value)
1573 {
1574
1575         free(o->o_value);
1576         o->o_value = checked_strdup(value);
1577 }
1578
1579 static struct connection *
1580 connection_new(struct portal *portal, int fd, const char *host,
1581     const struct sockaddr *client_sa)
1582 {
1583         struct connection *conn;
1584
1585         conn = calloc(1, sizeof(*conn));
1586         if (conn == NULL)
1587                 log_err(1, "calloc");
1588         conn->conn_portal = portal;
1589         conn->conn_socket = fd;
1590         conn->conn_initiator_addr = checked_strdup(host);
1591         memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1592
1593         /*
1594          * Default values, from RFC 3720, section 12.
1595          */
1596         conn->conn_max_recv_data_segment_length = 8192;
1597         conn->conn_max_send_data_segment_length = 8192;
1598         conn->conn_max_burst_length = 262144;
1599         conn->conn_first_burst_length = 65536;
1600         conn->conn_immediate_data = true;
1601
1602         return (conn);
1603 }
1604
1605 #if 0
1606 static void
1607 conf_print(struct conf *conf)
1608 {
1609         struct auth_group *ag;
1610         struct auth *auth;
1611         struct auth_name *auth_name;
1612         struct auth_portal *auth_portal;
1613         struct portal_group *pg;
1614         struct portal *portal;
1615         struct target *targ;
1616         struct lun *lun;
1617         struct option *o;
1618
1619         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1620                 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1621                 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1622                         fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1623                             auth->a_user, auth->a_secret,
1624                             auth->a_mutual_user, auth->a_mutual_secret);
1625                 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1626                         fprintf(stderr, "\t initiator-name %s\n",
1627                             auth_name->an_initator_name);
1628                 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next)
1629                         fprintf(stderr, "\t initiator-portal %s\n",
1630                             auth_portal->an_initator_portal);
1631                 fprintf(stderr, "}\n");
1632         }
1633         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1634                 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1635                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1636                         fprintf(stderr, "\t listen %s\n", portal->p_listen);
1637                 fprintf(stderr, "}\n");
1638         }
1639         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1640                 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1641                 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1642                 TAILQ_FOREACH(o, &lun->l_options, o_next)
1643                         fprintf(stderr, "\t\toption %s %s\n",
1644                             lo->o_name, lo->o_value);
1645                 fprintf(stderr, "\t}\n");
1646         }
1647         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1648                 fprintf(stderr, "target %s {\n", targ->t_name);
1649                 if (targ->t_alias != NULL)
1650                         fprintf(stderr, "\t alias %s\n", targ->t_alias);
1651                 fprintf(stderr, "}\n");
1652         }
1653 }
1654 #endif
1655
1656 static int
1657 conf_verify_lun(struct lun *lun)
1658 {
1659         const struct lun *lun2;
1660
1661         if (lun->l_backend == NULL)
1662                 lun_set_backend(lun, "block");
1663         if (strcmp(lun->l_backend, "block") == 0) {
1664                 if (lun->l_path == NULL) {
1665                         log_warnx("missing path for lun \"%s\"",
1666                             lun->l_name);
1667                         return (1);
1668                 }
1669         } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1670                 if (lun->l_size == 0) {
1671                         log_warnx("missing size for ramdisk-backed lun \"%s\"",
1672                             lun->l_name);
1673                         return (1);
1674                 }
1675                 if (lun->l_path != NULL) {
1676                         log_warnx("path must not be specified "
1677                             "for ramdisk-backed lun \"%s\"",
1678                             lun->l_name);
1679                         return (1);
1680                 }
1681         }
1682         if (lun->l_blocksize == 0) {
1683                 if (lun->l_device_type == 5)
1684                         lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE);
1685                 else
1686                         lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1687         } else if (lun->l_blocksize < 0) {
1688                 log_warnx("invalid blocksize for lun \"%s\"; "
1689                     "must be larger than 0", lun->l_name);
1690                 return (1);
1691         }
1692         if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1693                 log_warnx("invalid size for lun \"%s\"; "
1694                     "must be multiple of blocksize", lun->l_name);
1695                 return (1);
1696         }
1697         TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1698                 if (lun == lun2)
1699                         continue;
1700                 if (lun->l_path != NULL && lun2->l_path != NULL &&
1701                     strcmp(lun->l_path, lun2->l_path) == 0) {
1702                         log_debugx("WARNING: path \"%s\" duplicated "
1703                             "between lun \"%s\", and "
1704                             "lun \"%s\"", lun->l_path,
1705                             lun->l_name, lun2->l_name);
1706                 }
1707         }
1708
1709         return (0);
1710 }
1711
1712 int
1713 conf_verify(struct conf *conf)
1714 {
1715         struct auth_group *ag;
1716         struct portal_group *pg;
1717         struct port *port;
1718         struct target *targ;
1719         struct lun *lun;
1720         bool found;
1721         int error, i;
1722
1723         if (conf->conf_pidfile_path == NULL)
1724                 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1725
1726         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1727                 error = conf_verify_lun(lun);
1728                 if (error != 0)
1729                         return (error);
1730         }
1731         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1732                 if (targ->t_auth_group == NULL) {
1733                         targ->t_auth_group = auth_group_find(conf,
1734                             "default");
1735                         assert(targ->t_auth_group != NULL);
1736                 }
1737                 if (TAILQ_EMPTY(&targ->t_ports)) {
1738                         pg = portal_group_find(conf, "default");
1739                         assert(pg != NULL);
1740                         port_new(conf, targ, pg);
1741                 }
1742                 found = false;
1743                 for (i = 0; i < MAX_LUNS; i++) {
1744                         if (targ->t_luns[i] != NULL)
1745                                 found = true;
1746                 }
1747                 if (!found && targ->t_redirection == NULL) {
1748                         log_warnx("no LUNs defined for target \"%s\"",
1749                             targ->t_name);
1750                 }
1751                 if (found && targ->t_redirection != NULL) {
1752                         log_debugx("target \"%s\" contains luns, "
1753                             " but configured for redirection",
1754                             targ->t_name);
1755                 }
1756         }
1757         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1758                 assert(pg->pg_name != NULL);
1759                 if (pg->pg_discovery_auth_group == NULL) {
1760                         pg->pg_discovery_auth_group =
1761                             auth_group_find(conf, "default");
1762                         assert(pg->pg_discovery_auth_group != NULL);
1763                 }
1764
1765                 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1766                         pg->pg_discovery_filter = PG_FILTER_NONE;
1767
1768                 if (pg->pg_redirection != NULL) {
1769                         if (!TAILQ_EMPTY(&pg->pg_ports)) {
1770                                 log_debugx("portal-group \"%s\" assigned "
1771                                     "to target, but configured "
1772                                     "for redirection",
1773                                     pg->pg_name);
1774                         }
1775                         pg->pg_unassigned = false;
1776                 } else if (!TAILQ_EMPTY(&pg->pg_ports)) {
1777                         pg->pg_unassigned = false;
1778                 } else {
1779                         if (strcmp(pg->pg_name, "default") != 0)
1780                                 log_warnx("portal-group \"%s\" not assigned "
1781                                     "to any target", pg->pg_name);
1782                         pg->pg_unassigned = true;
1783                 }
1784         }
1785         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1786                 if (ag->ag_name == NULL)
1787                         assert(ag->ag_target != NULL);
1788                 else
1789                         assert(ag->ag_target == NULL);
1790
1791                 found = false;
1792                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1793                         if (targ->t_auth_group == ag) {
1794                                 found = true;
1795                                 break;
1796                         }
1797                 }
1798                 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1799                         if (port->p_auth_group == ag) {
1800                                 found = true;
1801                                 break;
1802                         }
1803                 }
1804                 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1805                         if (pg->pg_discovery_auth_group == ag) {
1806                                 found = true;
1807                                 break;
1808                         }
1809                 }
1810                 if (!found && ag->ag_name != NULL &&
1811                     strcmp(ag->ag_name, "default") != 0 &&
1812                     strcmp(ag->ag_name, "no-authentication") != 0 &&
1813                     strcmp(ag->ag_name, "no-access") != 0) {
1814                         log_warnx("auth-group \"%s\" not assigned "
1815                             "to any target", ag->ag_name);
1816                 }
1817         }
1818
1819         return (0);
1820 }
1821
1822 static int
1823 conf_apply(struct conf *oldconf, struct conf *newconf)
1824 {
1825         struct lun *oldlun, *newlun, *tmplun;
1826         struct portal_group *oldpg, *newpg;
1827         struct portal *oldp, *newp;
1828         struct port *oldport, *newport, *tmpport;
1829         struct isns *oldns, *newns;
1830         pid_t otherpid;
1831         int changed, cumulated_error = 0, error, sockbuf;
1832         int one = 1;
1833
1834         if (oldconf->conf_debug != newconf->conf_debug) {
1835                 log_debugx("changing debug level to %d", newconf->conf_debug);
1836                 log_init(newconf->conf_debug);
1837         }
1838
1839         if (oldconf->conf_pidfh != NULL) {
1840                 assert(oldconf->conf_pidfile_path != NULL);
1841                 if (newconf->conf_pidfile_path != NULL &&
1842                     strcmp(oldconf->conf_pidfile_path,
1843                     newconf->conf_pidfile_path) == 0) {
1844                         newconf->conf_pidfh = oldconf->conf_pidfh;
1845                         oldconf->conf_pidfh = NULL;
1846                 } else {
1847                         log_debugx("removing pidfile %s",
1848                             oldconf->conf_pidfile_path);
1849                         pidfile_remove(oldconf->conf_pidfh);
1850                         oldconf->conf_pidfh = NULL;
1851                 }
1852         }
1853
1854         if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1855                 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1856                 newconf->conf_pidfh =
1857                     pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1858                 if (newconf->conf_pidfh == NULL) {
1859                         if (errno == EEXIST)
1860                                 log_errx(1, "daemon already running, pid: %jd.",
1861                                     (intmax_t)otherpid);
1862                         log_err(1, "cannot open or create pidfile \"%s\"",
1863                             newconf->conf_pidfile_path);
1864                 }
1865         }
1866
1867         /*
1868          * Go through the new portal groups, assigning tags or preserving old.
1869          */
1870         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1871                 if (newpg->pg_tag != 0)
1872                         continue;
1873                 oldpg = portal_group_find(oldconf, newpg->pg_name);
1874                 if (oldpg != NULL)
1875                         newpg->pg_tag = oldpg->pg_tag;
1876                 else
1877                         newpg->pg_tag = ++last_portal_group_tag;
1878         }
1879
1880         /* Deregister on removed iSNS servers. */
1881         TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1882                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1883                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1884                                 break;
1885                 }
1886                 if (newns == NULL)
1887                         isns_deregister(oldns);
1888         }
1889
1890         /*
1891          * XXX: If target or lun removal fails, we should somehow "move"
1892          *      the old lun or target into newconf, so that subsequent
1893          *      conf_apply() would try to remove them again.  That would
1894          *      be somewhat hairy, though, and lun deletion failures don't
1895          *      really happen, so leave it as it is for now.
1896          */
1897         /*
1898          * First, remove any ports present in the old configuration
1899          * and missing in the new one.
1900          */
1901         TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1902                 if (port_is_dummy(oldport))
1903                         continue;
1904                 newport = port_find(newconf, oldport->p_name);
1905                 if (newport != NULL && !port_is_dummy(newport))
1906                         continue;
1907                 log_debugx("removing port \"%s\"", oldport->p_name);
1908                 error = kernel_port_remove(oldport);
1909                 if (error != 0) {
1910                         log_warnx("failed to remove port %s",
1911                             oldport->p_name);
1912                         /*
1913                          * XXX: Uncomment after fixing the root cause.
1914                          *
1915                          * cumulated_error++;
1916                          */
1917                 }
1918         }
1919
1920         /*
1921          * Second, remove any LUNs present in the old configuration
1922          * and missing in the new one.
1923          */
1924         TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
1925                 newlun = lun_find(newconf, oldlun->l_name);
1926                 if (newlun == NULL) {
1927                         log_debugx("lun \"%s\", CTL lun %d "
1928                             "not found in new configuration; "
1929                             "removing", oldlun->l_name, oldlun->l_ctl_lun);
1930                         error = kernel_lun_remove(oldlun);
1931                         if (error != 0) {
1932                                 log_warnx("failed to remove lun \"%s\", "
1933                                     "CTL lun %d",
1934                                     oldlun->l_name, oldlun->l_ctl_lun);
1935                                 cumulated_error++;
1936                         }
1937                         continue;
1938                 }
1939
1940                 /*
1941                  * Also remove the LUNs changed by more than size.
1942                  */
1943                 changed = 0;
1944                 assert(oldlun->l_backend != NULL);
1945                 assert(newlun->l_backend != NULL);
1946                 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
1947                         log_debugx("backend for lun \"%s\", "
1948                             "CTL lun %d changed; removing",
1949                             oldlun->l_name, oldlun->l_ctl_lun);
1950                         changed = 1;
1951                 }
1952                 if (oldlun->l_blocksize != newlun->l_blocksize) {
1953                         log_debugx("blocksize for lun \"%s\", "
1954                             "CTL lun %d changed; removing",
1955                             oldlun->l_name, oldlun->l_ctl_lun);
1956                         changed = 1;
1957                 }
1958                 if (newlun->l_device_id != NULL &&
1959                     (oldlun->l_device_id == NULL ||
1960                      strcmp(oldlun->l_device_id, newlun->l_device_id) !=
1961                      0)) {
1962                         log_debugx("device-id for lun \"%s\", "
1963                             "CTL lun %d changed; removing",
1964                             oldlun->l_name, oldlun->l_ctl_lun);
1965                         changed = 1;
1966                 }
1967                 if (newlun->l_path != NULL &&
1968                     (oldlun->l_path == NULL ||
1969                      strcmp(oldlun->l_path, newlun->l_path) != 0)) {
1970                         log_debugx("path for lun \"%s\", "
1971                             "CTL lun %d, changed; removing",
1972                             oldlun->l_name, oldlun->l_ctl_lun);
1973                         changed = 1;
1974                 }
1975                 if (newlun->l_serial != NULL &&
1976                     (oldlun->l_serial == NULL ||
1977                      strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
1978                         log_debugx("serial for lun \"%s\", "
1979                             "CTL lun %d changed; removing",
1980                             oldlun->l_name, oldlun->l_ctl_lun);
1981                         changed = 1;
1982                 }
1983                 if (changed) {
1984                         error = kernel_lun_remove(oldlun);
1985                         if (error != 0) {
1986                                 log_warnx("failed to remove lun \"%s\", "
1987                                     "CTL lun %d",
1988                                     oldlun->l_name, oldlun->l_ctl_lun);
1989                                 cumulated_error++;
1990                         }
1991                         lun_delete(oldlun);
1992                         continue;
1993                 }
1994
1995                 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
1996         }
1997
1998         TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
1999                 oldlun = lun_find(oldconf, newlun->l_name);
2000                 if (oldlun != NULL) {
2001                         log_debugx("modifying lun \"%s\", CTL lun %d",
2002                             newlun->l_name, newlun->l_ctl_lun);
2003                         error = kernel_lun_modify(newlun);
2004                         if (error != 0) {
2005                                 log_warnx("failed to "
2006                                     "modify lun \"%s\", CTL lun %d",
2007                                     newlun->l_name, newlun->l_ctl_lun);
2008                                 cumulated_error++;
2009                         }
2010                         continue;
2011                 }
2012                 log_debugx("adding lun \"%s\"", newlun->l_name);
2013                 error = kernel_lun_add(newlun);
2014                 if (error != 0) {
2015                         log_warnx("failed to add lun \"%s\"", newlun->l_name);
2016                         lun_delete(newlun);
2017                         cumulated_error++;
2018                 }
2019         }
2020
2021         /*
2022          * Now add new ports or modify existing ones.
2023          */
2024         TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) {
2025                 if (port_is_dummy(newport))
2026                         continue;
2027                 oldport = port_find(oldconf, newport->p_name);
2028
2029                 if (oldport == NULL || port_is_dummy(oldport)) {
2030                         log_debugx("adding port \"%s\"", newport->p_name);
2031                         error = kernel_port_add(newport);
2032                 } else {
2033                         log_debugx("updating port \"%s\"", newport->p_name);
2034                         newport->p_ctl_port = oldport->p_ctl_port;
2035                         error = kernel_port_update(newport, oldport);
2036                 }
2037                 if (error != 0) {
2038                         log_warnx("failed to %s port %s",
2039                             (oldport == NULL) ? "add" : "update",
2040                             newport->p_name);
2041                         /*
2042                          * XXX: Uncomment after fixing the root cause.
2043                          *
2044                          * cumulated_error++;
2045                          */
2046                 }
2047         }
2048
2049         /*
2050          * Go through the new portals, opening the sockets as necessary.
2051          */
2052         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
2053                 if (newpg->pg_foreign)
2054                         continue;
2055                 if (newpg->pg_unassigned) {
2056                         log_debugx("not listening on portal-group \"%s\", "
2057                             "not assigned to any target",
2058                             newpg->pg_name);
2059                         continue;
2060                 }
2061                 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2062                         /*
2063                          * Try to find already open portal and reuse
2064                          * the listening socket.  We don't care about
2065                          * what portal or portal group that was, what
2066                          * matters is the listening address.
2067                          */
2068                         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2069                             pg_next) {
2070                                 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2071                                     p_next) {
2072                                         if (strcmp(newp->p_listen,
2073                                             oldp->p_listen) == 0 &&
2074                                             oldp->p_socket > 0) {
2075                                                 newp->p_socket =
2076                                                     oldp->p_socket;
2077                                                 oldp->p_socket = 0;
2078                                                 break;
2079                                         }
2080                                 }
2081                         }
2082                         if (newp->p_socket > 0) {
2083                                 /*
2084                                  * We're done with this portal.
2085                                  */
2086                                 continue;
2087                         }
2088
2089 #ifdef ICL_KERNEL_PROXY
2090                         if (proxy_mode) {
2091                                 newpg->pg_conf->conf_portal_id++;
2092                                 newp->p_id = newpg->pg_conf->conf_portal_id;
2093                                 log_debugx("listening on %s, portal-group "
2094                                     "\"%s\", portal id %d, using ICL proxy",
2095                                     newp->p_listen, newpg->pg_name, newp->p_id);
2096                                 kernel_listen(newp->p_ai, newp->p_iser,
2097                                     newp->p_id);
2098                                 continue;
2099                         }
2100 #endif
2101                         assert(proxy_mode == false);
2102                         assert(newp->p_iser == false);
2103
2104                         log_debugx("listening on %s, portal-group \"%s\"",
2105                             newp->p_listen, newpg->pg_name);
2106                         newp->p_socket = socket(newp->p_ai->ai_family,
2107                             newp->p_ai->ai_socktype,
2108                             newp->p_ai->ai_protocol);
2109                         if (newp->p_socket < 0) {
2110                                 log_warn("socket(2) failed for %s",
2111                                     newp->p_listen);
2112                                 cumulated_error++;
2113                                 continue;
2114                         }
2115                         sockbuf = SOCKBUF_SIZE;
2116                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2117                             &sockbuf, sizeof(sockbuf)) == -1)
2118                                 log_warn("setsockopt(SO_RCVBUF) failed "
2119                                     "for %s", newp->p_listen);
2120                         sockbuf = SOCKBUF_SIZE;
2121                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2122                             &sockbuf, sizeof(sockbuf)) == -1)
2123                                 log_warn("setsockopt(SO_SNDBUF) failed "
2124                                     "for %s", newp->p_listen);
2125                         error = setsockopt(newp->p_socket, SOL_SOCKET,
2126                             SO_REUSEADDR, &one, sizeof(one));
2127                         if (error != 0) {
2128                                 log_warn("setsockopt(SO_REUSEADDR) failed "
2129                                     "for %s", newp->p_listen);
2130                                 close(newp->p_socket);
2131                                 newp->p_socket = 0;
2132                                 cumulated_error++;
2133                                 continue;
2134                         }
2135                         error = bind(newp->p_socket, newp->p_ai->ai_addr,
2136                             newp->p_ai->ai_addrlen);
2137                         if (error != 0) {
2138                                 log_warn("bind(2) failed for %s",
2139                                     newp->p_listen);
2140                                 close(newp->p_socket);
2141                                 newp->p_socket = 0;
2142                                 cumulated_error++;
2143                                 continue;
2144                         }
2145                         error = listen(newp->p_socket, -1);
2146                         if (error != 0) {
2147                                 log_warn("listen(2) failed for %s",
2148                                     newp->p_listen);
2149                                 close(newp->p_socket);
2150                                 newp->p_socket = 0;
2151                                 cumulated_error++;
2152                                 continue;
2153                         }
2154                 }
2155         }
2156
2157         /*
2158          * Go through the no longer used sockets, closing them.
2159          */
2160         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2161                 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2162                         if (oldp->p_socket <= 0)
2163                                 continue;
2164                         log_debugx("closing socket for %s, portal-group \"%s\"",
2165                             oldp->p_listen, oldpg->pg_name);
2166                         close(oldp->p_socket);
2167                         oldp->p_socket = 0;
2168                 }
2169         }
2170
2171         /* (Re-)Register on remaining/new iSNS servers. */
2172         TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2173                 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2174                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2175                                 break;
2176                 }
2177                 isns_register(newns, oldns);
2178         }
2179
2180         /* Schedule iSNS update */
2181         if (!TAILQ_EMPTY(&newconf->conf_isns))
2182                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2183
2184         return (cumulated_error);
2185 }
2186
2187 bool
2188 timed_out(void)
2189 {
2190
2191         return (sigalrm_received);
2192 }
2193
2194 static void
2195 sigalrm_handler_fatal(int dummy __unused)
2196 {
2197         /*
2198          * It would be easiest to just log an error and exit.  We can't
2199          * do this, though, because log_errx() is not signal safe, since
2200          * it calls syslog(3).  Instead, set a flag checked by pdu_send()
2201          * and pdu_receive(), to call log_errx() there.  Should they fail
2202          * to notice, we'll exit here one second later.
2203          */
2204         if (sigalrm_received) {
2205                 /*
2206                  * Oh well.  Just give up and quit.
2207                  */
2208                 _exit(2);
2209         }
2210
2211         sigalrm_received = true;
2212 }
2213
2214 static void
2215 sigalrm_handler(int dummy __unused)
2216 {
2217
2218         sigalrm_received = true;
2219 }
2220
2221 void
2222 set_timeout(int timeout, int fatal)
2223 {
2224         struct sigaction sa;
2225         struct itimerval itv;
2226         int error;
2227
2228         if (timeout <= 0) {
2229                 log_debugx("session timeout disabled");
2230                 bzero(&itv, sizeof(itv));
2231                 error = setitimer(ITIMER_REAL, &itv, NULL);
2232                 if (error != 0)
2233                         log_err(1, "setitimer");
2234                 sigalrm_received = false;
2235                 return;
2236         }
2237
2238         sigalrm_received = false;
2239         bzero(&sa, sizeof(sa));
2240         if (fatal)
2241                 sa.sa_handler = sigalrm_handler_fatal;
2242         else
2243                 sa.sa_handler = sigalrm_handler;
2244         sigfillset(&sa.sa_mask);
2245         error = sigaction(SIGALRM, &sa, NULL);
2246         if (error != 0)
2247                 log_err(1, "sigaction");
2248
2249         /*
2250          * First SIGALRM will arive after conf_timeout seconds.
2251          * If we do nothing, another one will arrive a second later.
2252          */
2253         log_debugx("setting session timeout to %d seconds", timeout);
2254         bzero(&itv, sizeof(itv));
2255         itv.it_interval.tv_sec = 1;
2256         itv.it_value.tv_sec = timeout;
2257         error = setitimer(ITIMER_REAL, &itv, NULL);
2258         if (error != 0)
2259                 log_err(1, "setitimer");
2260 }
2261
2262 static int
2263 wait_for_children(bool block)
2264 {
2265         pid_t pid;
2266         int status;
2267         int num = 0;
2268
2269         for (;;) {
2270                 /*
2271                  * If "block" is true, wait for at least one process.
2272                  */
2273                 if (block && num == 0)
2274                         pid = wait4(-1, &status, 0, NULL);
2275                 else
2276                         pid = wait4(-1, &status, WNOHANG, NULL);
2277                 if (pid <= 0)
2278                         break;
2279                 if (WIFSIGNALED(status)) {
2280                         log_warnx("child process %d terminated with signal %d",
2281                             pid, WTERMSIG(status));
2282                 } else if (WEXITSTATUS(status) != 0) {
2283                         log_warnx("child process %d terminated with exit status %d",
2284                             pid, WEXITSTATUS(status));
2285                 } else {
2286                         log_debugx("child process %d terminated gracefully", pid);
2287                 }
2288                 num++;
2289         }
2290
2291         return (num);
2292 }
2293
2294 static void
2295 handle_connection(struct portal *portal, int fd,
2296     const struct sockaddr *client_sa, bool dont_fork)
2297 {
2298         struct connection *conn;
2299         int error;
2300         pid_t pid;
2301         char host[NI_MAXHOST + 1];
2302         struct conf *conf;
2303
2304         conf = portal->p_portal_group->pg_conf;
2305
2306         if (dont_fork) {
2307                 log_debugx("incoming connection; not forking due to -d flag");
2308         } else {
2309                 nchildren -= wait_for_children(false);
2310                 assert(nchildren >= 0);
2311
2312                 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2313                         log_debugx("maxproc limit of %d child processes hit; "
2314                             "waiting for child process to exit", conf->conf_maxproc);
2315                         nchildren -= wait_for_children(true);
2316                         assert(nchildren >= 0);
2317                 }
2318                 log_debugx("incoming connection; forking child process #%d",
2319                     nchildren);
2320                 nchildren++;
2321                 pid = fork();
2322                 if (pid < 0)
2323                         log_err(1, "fork");
2324                 if (pid > 0) {
2325                         close(fd);
2326                         return;
2327                 }
2328         }
2329         pidfile_close(conf->conf_pidfh);
2330
2331         error = getnameinfo(client_sa, client_sa->sa_len,
2332             host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2333         if (error != 0)
2334                 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2335
2336         log_debugx("accepted connection from %s; portal group \"%s\"",
2337             host, portal->p_portal_group->pg_name);
2338         log_set_peer_addr(host);
2339         setproctitle("%s", host);
2340
2341         conn = connection_new(portal, fd, host, client_sa);
2342         set_timeout(conf->conf_timeout, true);
2343         kernel_capsicate();
2344         login(conn);
2345         if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2346                 kernel_handoff(conn);
2347                 log_debugx("connection handed off to the kernel");
2348         } else {
2349                 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2350                 discovery(conn);
2351         }
2352         log_debugx("nothing more to do; exiting");
2353         exit(0);
2354 }
2355
2356 static int
2357 fd_add(int fd, fd_set *fdset, int nfds)
2358 {
2359
2360         /*
2361          * Skip sockets which we failed to bind.
2362          */
2363         if (fd <= 0)
2364                 return (nfds);
2365
2366         FD_SET(fd, fdset);
2367         if (fd > nfds)
2368                 nfds = fd;
2369         return (nfds);
2370 }
2371
2372 static void
2373 main_loop(struct conf *conf, bool dont_fork)
2374 {
2375         struct portal_group *pg;
2376         struct portal *portal;
2377         struct sockaddr_storage client_sa;
2378         socklen_t client_salen;
2379 #ifdef ICL_KERNEL_PROXY
2380         int connection_id;
2381         int portal_id;
2382 #endif
2383         fd_set fdset;
2384         int error, nfds, client_fd;
2385
2386         pidfile_write(conf->conf_pidfh);
2387
2388         for (;;) {
2389                 if (sighup_received || sigterm_received || timed_out())
2390                         return;
2391
2392 #ifdef ICL_KERNEL_PROXY
2393                 if (proxy_mode) {
2394                         client_salen = sizeof(client_sa);
2395                         kernel_accept(&connection_id, &portal_id,
2396                             (struct sockaddr *)&client_sa, &client_salen);
2397                         assert(client_salen >= client_sa.ss_len);
2398
2399                         log_debugx("incoming connection, id %d, portal id %d",
2400                             connection_id, portal_id);
2401                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2402                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2403                                         if (portal->p_id == portal_id) {
2404                                                 goto found;
2405                                         }
2406                                 }
2407                         }
2408
2409                         log_errx(1, "kernel returned invalid portal_id %d",
2410                             portal_id);
2411
2412 found:
2413                         handle_connection(portal, connection_id,
2414                             (struct sockaddr *)&client_sa, dont_fork);
2415                 } else {
2416 #endif
2417                         assert(proxy_mode == false);
2418
2419                         FD_ZERO(&fdset);
2420                         nfds = 0;
2421                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2422                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2423                                         nfds = fd_add(portal->p_socket, &fdset, nfds);
2424                         }
2425                         error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2426                         if (error <= 0) {
2427                                 if (errno == EINTR)
2428                                         return;
2429                                 log_err(1, "select");
2430                         }
2431                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2432                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2433                                         if (!FD_ISSET(portal->p_socket, &fdset))
2434                                                 continue;
2435                                         client_salen = sizeof(client_sa);
2436                                         client_fd = accept(portal->p_socket,
2437                                             (struct sockaddr *)&client_sa,
2438                                             &client_salen);
2439                                         if (client_fd < 0) {
2440                                                 if (errno == ECONNABORTED)
2441                                                         continue;
2442                                                 log_err(1, "accept");
2443                                         }
2444                                         assert(client_salen >= client_sa.ss_len);
2445
2446                                         handle_connection(portal, client_fd,
2447                                             (struct sockaddr *)&client_sa,
2448                                             dont_fork);
2449                                         break;
2450                                 }
2451                         }
2452 #ifdef ICL_KERNEL_PROXY
2453                 }
2454 #endif
2455         }
2456 }
2457
2458 static void
2459 sighup_handler(int dummy __unused)
2460 {
2461
2462         sighup_received = true;
2463 }
2464
2465 static void
2466 sigterm_handler(int dummy __unused)
2467 {
2468
2469         sigterm_received = true;
2470 }
2471
2472 static void
2473 sigchld_handler(int dummy __unused)
2474 {
2475
2476         /*
2477          * The only purpose of this handler is to make SIGCHLD
2478          * interrupt the ISCSIDWAIT ioctl(2), so we can call
2479          * wait_for_children().
2480          */
2481 }
2482
2483 static void
2484 register_signals(void)
2485 {
2486         struct sigaction sa;
2487         int error;
2488
2489         bzero(&sa, sizeof(sa));
2490         sa.sa_handler = sighup_handler;
2491         sigfillset(&sa.sa_mask);
2492         error = sigaction(SIGHUP, &sa, NULL);
2493         if (error != 0)
2494                 log_err(1, "sigaction");
2495
2496         sa.sa_handler = sigterm_handler;
2497         error = sigaction(SIGTERM, &sa, NULL);
2498         if (error != 0)
2499                 log_err(1, "sigaction");
2500
2501         sa.sa_handler = sigterm_handler;
2502         error = sigaction(SIGINT, &sa, NULL);
2503         if (error != 0)
2504                 log_err(1, "sigaction");
2505
2506         sa.sa_handler = sigchld_handler;
2507         error = sigaction(SIGCHLD, &sa, NULL);
2508         if (error != 0)
2509                 log_err(1, "sigaction");
2510 }
2511
2512 static void
2513 check_perms(const char *path)
2514 {
2515         struct stat sb;
2516         int error;
2517
2518         error = stat(path, &sb);
2519         if (error != 0) {
2520                 log_warn("stat");
2521                 return;
2522         }
2523         if (sb.st_mode & S_IWOTH) {
2524                 log_warnx("%s is world-writable", path);
2525         } else if (sb.st_mode & S_IROTH) {
2526                 log_warnx("%s is world-readable", path);
2527         } else if (sb.st_mode & S_IXOTH) {
2528                 /*
2529                  * Ok, this one doesn't matter, but still do it,
2530                  * just for consistency.
2531                  */
2532                 log_warnx("%s is world-executable", path);
2533         }
2534
2535         /*
2536          * XXX: Should we also check for owner != 0?
2537          */
2538 }
2539
2540 static struct conf *
2541 conf_new_from_file(const char *path, struct conf *oldconf, bool ucl)
2542 {
2543         struct conf *conf;
2544         struct auth_group *ag;
2545         struct portal_group *pg;
2546         struct pport *pp;
2547         int error;
2548
2549         log_debugx("obtaining configuration from %s", path);
2550
2551         conf = conf_new();
2552
2553         TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next)
2554                 pport_copy(pp, conf);
2555
2556         ag = auth_group_new(conf, "default");
2557         assert(ag != NULL);
2558
2559         ag = auth_group_new(conf, "no-authentication");
2560         assert(ag != NULL);
2561         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
2562
2563         ag = auth_group_new(conf, "no-access");
2564         assert(ag != NULL);
2565         ag->ag_type = AG_TYPE_DENY;
2566
2567         pg = portal_group_new(conf, "default");
2568         assert(pg != NULL);
2569
2570         if (ucl)
2571                 error = uclparse_conf(conf, path);
2572         else
2573                 error = parse_conf(conf, path);
2574
2575         if (error != 0) {
2576                 conf_delete(conf);
2577                 return (NULL);
2578         }
2579
2580         check_perms(path);
2581
2582         if (conf->conf_default_ag_defined == false) {
2583                 log_debugx("auth-group \"default\" not defined; "
2584                     "going with defaults");
2585                 ag = auth_group_find(conf, "default");
2586                 assert(ag != NULL);
2587                 ag->ag_type = AG_TYPE_DENY;
2588         }
2589
2590         if (conf->conf_default_pg_defined == false) {
2591                 log_debugx("portal-group \"default\" not defined; "
2592                     "going with defaults");
2593                 pg = portal_group_find(conf, "default");
2594                 assert(pg != NULL);
2595                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
2596                 portal_group_add_listen(pg, "[::]:3260", false);
2597         }
2598
2599         conf->conf_kernel_port_on = true;
2600
2601         error = conf_verify(conf);
2602         if (error != 0) {
2603                 conf_delete(conf);
2604                 return (NULL);
2605         }
2606
2607         return (conf);
2608 }
2609
2610 int
2611 main(int argc, char **argv)
2612 {
2613         struct conf *oldconf, *newconf, *tmpconf;
2614         struct isns *newns;
2615         const char *config_path = DEFAULT_CONFIG_PATH;
2616         int debug = 0, ch, error;
2617         bool dont_daemonize = false;
2618         bool use_ucl = false;
2619
2620         while ((ch = getopt(argc, argv, "duf:R")) != -1) {
2621                 switch (ch) {
2622                 case 'd':
2623                         dont_daemonize = true;
2624                         debug++;
2625                         break;
2626                 case 'u':
2627                         use_ucl = true;
2628                         break;
2629                 case 'f':
2630                         config_path = optarg;
2631                         break;
2632                 case 'R':
2633 #ifndef ICL_KERNEL_PROXY
2634                         log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2635                             "does not support iSER protocol");
2636 #endif
2637                         proxy_mode = true;
2638                         break;
2639                 case '?':
2640                 default:
2641                         usage();
2642                 }
2643         }
2644         argc -= optind;
2645         if (argc != 0)
2646                 usage();
2647
2648         log_init(debug);
2649         kernel_init();
2650
2651         oldconf = conf_new_from_kernel();
2652         newconf = conf_new_from_file(config_path, oldconf, use_ucl);
2653
2654         if (newconf == NULL)
2655                 log_errx(1, "configuration error; exiting");
2656         if (debug > 0) {
2657                 oldconf->conf_debug = debug;
2658                 newconf->conf_debug = debug;
2659         }
2660
2661         error = conf_apply(oldconf, newconf);
2662         if (error != 0)
2663                 log_errx(1, "failed to apply configuration; exiting");
2664
2665         conf_delete(oldconf);
2666         oldconf = NULL;
2667
2668         register_signals();
2669
2670         if (dont_daemonize == false) {
2671                 log_debugx("daemonizing");
2672                 if (daemon(0, 0) == -1) {
2673                         log_warn("cannot daemonize");
2674                         pidfile_remove(newconf->conf_pidfh);
2675                         exit(1);
2676                 }
2677         }
2678
2679         /* Schedule iSNS update */
2680         if (!TAILQ_EMPTY(&newconf->conf_isns))
2681                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2682
2683         for (;;) {
2684                 main_loop(newconf, dont_daemonize);
2685                 if (sighup_received) {
2686                         sighup_received = false;
2687                         log_debugx("received SIGHUP, reloading configuration");
2688                         tmpconf = conf_new_from_file(config_path, newconf,
2689                             use_ucl);
2690
2691                         if (tmpconf == NULL) {
2692                                 log_warnx("configuration error, "
2693                                     "continuing with old configuration");
2694                         } else {
2695                                 if (debug > 0)
2696                                         tmpconf->conf_debug = debug;
2697                                 oldconf = newconf;
2698                                 newconf = tmpconf;
2699                                 error = conf_apply(oldconf, newconf);
2700                                 if (error != 0)
2701                                         log_warnx("failed to reload "
2702                                             "configuration");
2703                                 conf_delete(oldconf);
2704                                 oldconf = NULL;
2705                         }
2706                 } else if (sigterm_received) {
2707                         log_debugx("exiting on signal; "
2708                             "reloading empty configuration");
2709
2710                         log_debugx("removing CTL iSCSI ports "
2711                             "and terminating all connections");
2712
2713                         oldconf = newconf;
2714                         newconf = conf_new();
2715                         if (debug > 0)
2716                                 newconf->conf_debug = debug;
2717                         error = conf_apply(oldconf, newconf);
2718                         if (error != 0)
2719                                 log_warnx("failed to apply configuration");
2720                         conf_delete(oldconf);
2721                         oldconf = NULL;
2722
2723                         log_warnx("exiting on signal");
2724                         exit(0);
2725                 } else {
2726                         nchildren -= wait_for_children(false);
2727                         assert(nchildren >= 0);
2728                         if (timed_out()) {
2729                                 set_timeout(0, false);
2730                                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2731                                         isns_check(newns);
2732                                 /* Schedule iSNS update */
2733                                 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2734                                         set_timeout((newconf->conf_isns_period
2735                                             + 2) / 3,
2736                                             false);
2737                                 }
2738                         }
2739                 }
2740         }
2741         /* NOTREACHED */
2742 }