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