src/main/conffile.c

   1 /*
   2  * conffile.c   Read the radiusd.conf file.
   3  *
   4  *              Yep I should learn to use lex & yacc, or at least
   5  *              write a decent parser. I know how to do that, really :)
   6  *              miquels@cistron.nl
   7  *
   8  * Version:     $Id$
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  *
  24  * Copyright 2000,2006  The FreeRADIUS server project
  25  * Copyright 2000  Miquel van Smoorenburg <miquels@cistron.nl>
  26  * Copyright 2000  Alan DeKok <aland@ox.org>
  27  */
  28
  29 #include <freeradius-devel/ident.h>
  30 RCSID("$Id$")
  31
  32 #include <freeradius-devel/radiusd.h>
  33 #include <freeradius-devel/rad_assert.h>
  34
  35 #ifdef HAVE_DIRENT_H
  36 #include <dirent.h>
  37
  38 #ifdef HAVE_SYS_STAT_H
  39 #include <sys/stat.h>
  40 #endif
  41 #endif
  42
  43 #include <ctype.h>
  44
  45 typedef enum conf_type {
  46         CONF_ITEM_INVALID = 0,
  47         CONF_ITEM_PAIR,
  48         CONF_ITEM_SECTION,
  49         CONF_ITEM_DATA
  50 } CONF_ITEM_TYPE;
  51
  52 struct conf_item {
  53         struct conf_item *next;
  54         struct conf_part *parent;
  55         int lineno;
  56         const char *filename;
  57         CONF_ITEM_TYPE type;
  58 };
  59 struct conf_pair {
  60         CONF_ITEM item;
  61         char *attr;
  62         char *value;
  63         LRAD_TOKEN operator;
  64         LRAD_TOKEN value_type;
  65 };
  66 struct conf_part {
  67         CONF_ITEM item;
  68         const char *name1;
  69         const char *name2;
  70         struct conf_item *children;
  71         struct conf_item *tail; /* for speed */
  72         CONF_SECTION    *template;
  73         rbtree_t        *pair_tree; /* and a partridge.. */
  74         rbtree_t        *section_tree; /* no jokes here */
  75         rbtree_t        *name2_tree; /* for sections of the same name2 */
  76         rbtree_t        *data_tree;
  77         void            *base;
  78         int depth;
  79         const CONF_PARSER *variables;
  80 };
  81
  82
  83 /*
  84  *      Internal data that is associated with a configuration section,
  85  *      so that we don't have to track it separately.
  86  */
  87 struct conf_data {
  88         CONF_ITEM  item;
  89         const char *name;
  90         int        flag;
  91         void       *data;       /* user data */
  92         void       (*free)(void *); /* free user data function */
  93 };
  94
  95
  96 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
  97                                 void *data, void (*data_free)(void *),
  98                                 int flag);
  99 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
 100                                    int flag);
 101
 102 /*
 103  *      Isolate the scary casts in these tiny provably-safe functions
 104  */
 105 CONF_PAIR *cf_itemtopair(CONF_ITEM *ci)
 106 {
 107         if (ci == NULL)
 108                 return NULL;
 109         rad_assert(ci->type == CONF_ITEM_PAIR);
 110         return (CONF_PAIR *)ci;
 111 }
 112 CONF_SECTION *cf_itemtosection(CONF_ITEM *ci)
 113 {
 114         if (ci == NULL)
 115                 return NULL;
 116         rad_assert(ci->type == CONF_ITEM_SECTION);
 117         return (CONF_SECTION *)ci;
 118 }
 119 CONF_ITEM *cf_pairtoitem(CONF_PAIR *cp)
 120 {
 121         if (cp == NULL)
 122                 return NULL;
 123         return (CONF_ITEM *)cp;
 124 }
 125 CONF_ITEM *cf_sectiontoitem(CONF_SECTION *cs)
 126 {
 127         if (cs == NULL)
 128                 return NULL;
 129         return (CONF_ITEM *)cs;
 130 }
 131
 132 static CONF_DATA *cf_itemtodata(CONF_ITEM *ci)
 133 {
 134         if (ci == NULL)
 135                 return NULL;
 136         rad_assert(ci->type == CONF_ITEM_DATA);
 137         return (CONF_DATA *)ci;
 138 }
 139 static CONF_ITEM *cf_datatoitem(CONF_DATA *cd)
 140 {
 141         if (cd == NULL)
 142                 return NULL;
 143         return (CONF_ITEM *)cd;
 144 }
 145
 146 /*
 147  *      Create a new CONF_PAIR
 148  */
 149 static CONF_PAIR *cf_pair_alloc(const char *attr, const char *value,
 150                                 LRAD_TOKEN operator, LRAD_TOKEN value_type,
 151                                 CONF_SECTION *parent)
 152 {
 153         CONF_PAIR *cp;
 154
 155         cp = rad_malloc(sizeof(*cp));
 156         memset(cp, 0, sizeof(*cp));
 157         cp->item.type = CONF_ITEM_PAIR;
 158         cp->item.parent = parent;
 159         cp->attr = strdup(attr);
 160         if (value) cp->value = strdup(value);
 161         cp->value_type = value_type;
 162         cp->operator = operator;
 163
 164         return cp;
 165 }
 166
 167 /*
 168  *      Free a CONF_PAIR
 169  */
 170 void cf_pair_free(CONF_PAIR **cp)
 171 {
 172         if (!cp || !*cp) return;
 173
 174         if ((*cp)->attr)
 175                 free((*cp)->attr);
 176         if ((*cp)->value)
 177                 free((*cp)->value);
 178
 179 #ifndef NDEBUG
 180         memset(*cp, 0, sizeof(*cp));
 181 #endif
 182         free(*cp);
 183
 184         *cp = NULL;
 185 }
 186
 187
 188 static void cf_data_free(CONF_DATA **cd)
 189 {
 190         if (!cd || !*cd) return;
 191
 192         if ((*cd)->flag != 0) free((*cd)->name);
 193         if (!(*cd)->free) {
 194                 free((*cd)->data);
 195         } else {
 196                 ((*cd)->free)((*cd)->data);
 197         }
 198 #ifndef NDEBUG
 199         memset(*cd, 0, sizeof(*cd));
 200 #endif
 201         free(*cd);
 202         *cd = NULL;
 203 }
 204
 205 /*
 206  *      rbtree callback function
 207  */
 208 static int pair_cmp(const void *a, const void *b)
 209 {
 210         const CONF_PAIR *one = a;
 211         const CONF_PAIR *two = b;
 212
 213         return strcmp(one->attr, two->attr);
 214 }
 215
 216
 217 /*
 218  *      rbtree callback function
 219  */
 220 static int section_cmp(const void *a, const void *b)
 221 {
 222         const CONF_SECTION *one = a;
 223         const CONF_SECTION *two = b;
 224
 225         return strcmp(one->name1, two->name1);
 226 }
 227
 228
 229 /*
 230  *      rbtree callback function
 231  */
 232 static int name2_cmp(const void *a, const void *b)
 233 {
 234         const CONF_SECTION *one = a;
 235         const CONF_SECTION *two = b;
 236
 237         rad_assert(strcmp(one->name1, two->name1) == 0);
 238
 239         if (!one->name2 && !two->name2) return 0;
 240         if (!one->name2) return -1;
 241         if (!two->name2) return +1;
 242
 243         return strcmp(one->name2, two->name2);
 244 }
 245
 246
 247 /*
 248  *      rbtree callback function
 249  */
 250 static int data_cmp(const void *a, const void *b)
 251 {
 252         int rcode;
 253
 254         const CONF_DATA *one = a;
 255         const CONF_DATA *two = b;
 256
 257         rcode = one->flag - two->flag;
 258         if (rcode != 0) return rcode;
 259
 260         return strcmp(one->name, two->name);
 261 }
 262
 263
 264 /*
 265  *      Free strings we've parsed into data structures.
 266  */
 267 static void cf_section_parse_free(void *base, const CONF_PARSER *variables)
 268 {
 269         int i;
 270
 271         /*
 272          *      Don't automatically free the strings if we're being
 273          *      called from a module.  This is also for clients.c,
 274          *      where client_free() expects to be able to free the
 275          *      client structure.  If we moved everything to key off
 276          *      of the config files, we might solve some problems...
 277          */
 278         if (!variables) return;
 279
 280         /*
 281          *      Free up dynamically allocated string pointers.
 282          */
 283         for (i = 0; variables[i].name != NULL; i++) {
 284                 char **p;
 285
 286                 if ((variables[i].type != PW_TYPE_STRING_PTR) &&
 287                     (variables[i].type != PW_TYPE_FILENAME)) {
 288                         continue;
 289                 }
 290
 291                 /*
 292                  *      No base struct offset, data must be the pointer.
 293                  *      If data doesn't exist, ignore the entry, there
 294                  *      must be something wrong.
 295                  */
 296                 if (!base) {
 297                         if (!variables[i].data) {
 298                                 continue;
 299                         }
 300
 301                         p = (char **) variables[i].data;;
 302
 303                 } else if (variables[i].data) {
 304                         p = (char **) variables[i].data;;
 305
 306                 } else {
 307                         p = (char **) (((char *)base) + variables[i].offset);
 308                 }
 309
 310                 free(*p);
 311                 *p = NULL;
 312         }
 313 }
 314
 315
 316 /*
 317  *      Free a CONF_SECTION
 318  */
 319 void cf_section_free(CONF_SECTION **cs)
 320 {
 321         CONF_ITEM       *ci, *next;
 322
 323         if (!cs || !*cs) return;
 324
 325         if ((*cs)->variables) {
 326                 cf_section_parse_free((*cs)->base, (*cs)->variables);
 327         }
 328
 329         for (ci = (*cs)->children; ci; ci = next) {
 330                 next = ci->next;
 331
 332                 switch (ci->type) {
 333                 case CONF_ITEM_PAIR: {
 334                                 CONF_PAIR *pair = cf_itemtopair(ci);
 335                                 cf_pair_free(&pair);
 336                         }
 337                         break;
 338
 339                 case CONF_ITEM_SECTION: {
 340                                 CONF_SECTION *section = cf_itemtosection(ci);
 341                                 cf_section_free(&section);
 342                         }
 343                         break;
 344
 345                 case CONF_ITEM_DATA: {
 346                                 CONF_DATA *data = cf_itemtodata(ci);
 347                                 cf_data_free(&data);
 348                         }
 349                         break;
 350
 351                 default:        /* should really be an error. */
 352                         break;
 353                 }
 354         }
 355
 356         if ((*cs)->name1)
 357                 free((*cs)->name1);
 358         if ((*cs)->name2)
 359                 free((*cs)->name2);
 360         if ((*cs)->pair_tree)
 361                 rbtree_free((*cs)->pair_tree);
 362         if ((*cs)->section_tree)
 363                 rbtree_free((*cs)->section_tree);
 364         if ((*cs)->name2_tree)
 365                 rbtree_free((*cs)->name2_tree);
 366         if ((*cs)->data_tree)
 367                 rbtree_free((*cs)->data_tree);
 368
 369         /*
 370          * And free the section
 371          */
 372 #ifndef NDEBUG
 373         memset(*cs, 0, sizeof(*cs));
 374 #endif
 375         free(*cs);
 376
 377         *cs = NULL;
 378 }
 379
 380
 381 /*
 382  *      Allocate a CONF_SECTION
 383  */
 384 static CONF_SECTION *cf_section_alloc(const char *name1, const char *name2,
 385                                       CONF_SECTION *parent)
 386 {
 387         CONF_SECTION    *cs;
 388
 389         if (!name1) return NULL;
 390
 391         cs = rad_malloc(sizeof(*cs));
 392         memset(cs, 0, sizeof(*cs));
 393         cs->item.type = CONF_ITEM_SECTION;
 394         cs->item.parent = parent;
 395         cs->name1 = strdup(name1);
 396         if (!cs->name1) {
 397                 cf_section_free(&cs);
 398                 return NULL;
 399         }
 400
 401         if (name2 && *name2) {
 402                 cs->name2 = strdup(name2);
 403                 if (!cs->name2) {
 404                         cf_section_free(&cs);
 405                         return NULL;
 406                 }
 407         }
 408         cs->pair_tree = rbtree_create(pair_cmp, NULL, 0);
 409         if (!cs->pair_tree) {
 410                 cf_section_free(&cs);
 411                 return NULL;
 412         }
 413
 414         /*
 415          *      Don't create a data tree, it may not be needed.
 416          */
 417
 418         /*
 419          *      Don't create the section tree here, it may not
 420          *      be needed.
 421          */
 422
 423         if (parent) cs->depth = parent->depth + 1;
 424
 425         return cs;
 426 }
 427
 428
 429 /*
 430  *      Add an item to a configuration section.
 431  */
 432 static void cf_item_add(CONF_SECTION *cs, CONF_ITEM *ci)
 433 {
 434         if (!cs->children) {
 435                 rad_assert(cs->tail == NULL);
 436                 cs->children = ci;
 437         } else {
 438                 rad_assert(cs->tail != NULL);
 439                 cs->tail->next = ci;
 440         }
 441
 442         /*
 443          *      Update the trees (and tail) for each item added.
 444          */
 445         for (/* nothing */; ci != NULL; ci = ci->next) {
 446                 cs->tail = ci;
 447
 448                 /*
 449                  *      For fast lookups, pair's and sections get
 450                  *      added to rbtree's.
 451                  */
 452                 switch (ci->type) {
 453                         case CONF_ITEM_PAIR:
 454                                 rbtree_insert(cs->pair_tree, ci);
 455                                 break;
 456
 457                         case CONF_ITEM_SECTION: {
 458                                 const CONF_SECTION *cs_new = cf_itemtosection(ci);
 459
 460                                 if (!cs->section_tree) {
 461                                         cs->section_tree = rbtree_create(section_cmp, NULL, 0);
 462                                         /* ignore any errors */
 463                                 }
 464
 465                                 if (cs->section_tree) {
 466                                         rbtree_insert(cs->section_tree, cs_new);                                }
 467
 468                                 /*
 469                                  *      Two names: find the named instance.
 470                                  */
 471                                 {
 472                                         CONF_SECTION *old_cs;
 473
 474                                         /*
 475                                          *      Find the FIRST
 476                                          *      CONF_SECTION having
 477                                          *      the given name1, and
 478                                          *      create a new tree
 479                                          *      under it.
 480                                          */
 481                                         old_cs = rbtree_finddata(cs->section_tree, cs_new);
 482                                         if (!old_cs) return; /* this is a bad error! */
 483
 484                                         if (!old_cs->name2_tree) {
 485                                                 old_cs->name2_tree = rbtree_create(name2_cmp,
 486                                                                                    NULL, 0);
 487                                         }
 488                                         if (old_cs->name2_tree) {
 489                                                 rbtree_insert(old_cs->name2_tree, cs_new);
 490                                         }
 491                                 } /* had a name2 */
 492                                 break;
 493                         } /* was a section */
 494
 495                         case CONF_ITEM_DATA:
 496                                 if (!cs->data_tree) {
 497                                         cs->data_tree = rbtree_create(data_cmp, NULL, 0);
 498                                 }
 499                                 if (cs->data_tree) {
 500                                         rbtree_insert(cs->data_tree, ci);
 501                                 }
 502                                 break;
 503
 504                         default: /* FIXME: assert & error! */
 505                                 break;
 506
 507                 } /* switch over conf types */
 508         } /* loop over ci */
 509 }
 510
 511
 512 static const CONF_ITEM *cf_reference_item(const CONF_SECTION *parentcs,
 513                                           const CONF_SECTION *outercs,
 514                                           const char *ptr)
 515 {
 516         CONF_PAIR *cp;
 517         const CONF_SECTION *cs = outercs, *next;
 518         char name[8192];
 519         char *p;
 520
 521         strlcpy(name, ptr, sizeof(name));
 522         p = name;
 523
 524         /*
 525          *      ".foo" means "foo from the current section"
 526          */
 527         if (*p == '.') {
 528                 p++;
 529
 530                 /*
 531                  *      ..foo means "foo from the section
 532                  *      enclosing this section" (etc.)
 533                  */
 534                 while (*p == '.') {
 535                         if (cs->item.parent)
 536                                 cs = cs->item.parent;
 537                         p++;
 538                 }
 539
 540                 /*
 541                  *      "foo.bar.baz" means "from the root"
 542                  */
 543         } else if (strchr(p, '.') != NULL) {
 544                 cs = parentcs;
 545         }
 546
 547         while (*p) {
 548                 char *q = strchr(p, '.');
 549
 550                 if (!q) break;
 551
 552                 *q = '\0';
 553                 next = cf_section_sub_find(cs, p);
 554                 *q = '.';
 555
 556                 if (!next) break; /* it MAY be a pair in this section! */
 557
 558                 cs = next;
 559                 p = q + 1;
 560         }
 561
 562         if (!*p) return NULL;
 563
 564  retry:
 565         /*
 566          *      Find it in the current referenced
 567          *      section.
 568          */
 569         cp = cf_pair_find(cs, p);
 570         if (cp) return cf_pairtoitem(cp);
 571
 572         next = cf_section_sub_find(cs, p);
 573         if (next) return cf_sectiontoitem(next);
 574
 575         /*
 576          *      "foo" is "in the current section, OR in main".
 577          */
 578         if ((p == name) && (cs != parentcs)) {
 579                 cs = parentcs;
 580                 goto retry;
 581         }
 582
 583         return NULL;
 584 }
 585
 586
 587 CONF_SECTION *cf_top_section(const CONF_SECTION *cs)
 588 {
 589         while (cs->item.parent != NULL) {
 590                 cs = cs->item.parent;
 591         }
 592
 593         return cs;
 594 }
 595
 596
 597 /*
 598  *      Expand the variables in an input string.
 599  */
 600 static const char *cf_expand_variables(const char *cf, int *lineno,
 601                                        const CONF_SECTION *outercs,
 602                                        char *output, const char *input)
 603 {
 604         char *p;
 605         const char *end, *ptr;
 606         const CONF_SECTION *parentcs;
 607         char name[8192];
 608
 609         /*
 610          *      Find the master parent conf section.
 611          *      We can't use mainconfig.config, because we're in the
 612          *      process of re-building it, and it isn't set up yet...
 613          */
 614         parentcs = cf_top_section(outercs);
 615
 616         p = output;
 617         ptr = input;
 618         while (*ptr) {
 619                 /*
 620                  *      Ignore anything other than "${"
 621                  */
 622                 if ((*ptr == '$') && (ptr[1] == '{')) {
 623                         CONF_ITEM *ci;
 624                         CONF_PAIR *cp;
 625
 626                         /*
 627                          *      FIXME: Add support for ${foo:-bar},
 628                          *      like in xlat.c
 629                          */
 630
 631                         /*
 632                          *      Look for trailing '}', and log a
 633                          *      warning for anything that doesn't match,
 634                          *      and exit with a fatal error.
 635                          */
 636                         end = strchr(ptr, '}');
 637                         if (end == NULL) {
 638                                 *p = '\0';
 639                                 radlog(L_INFO, "%s[%d]: Variable expansion missing }",
 640                                        cf, *lineno);
 641                                 return NULL;
 642                         }
 643
 644                         ptr += 2;
 645
 646                         /*
 647                          *      Can't really happen because input lines are
 648                          *      capped at 8k, which is sizeof(name)
 649                          */
 650                         if ((end - ptr) >= sizeof(name)) {
 651                                 radlog(L_ERR, "%s[%d]: Reference string is too large",
 652                                        cf, *lineno);
 653                                 return NULL;
 654                         }
 655
 656                         memcpy(name, ptr, end - ptr);
 657                         name[end - ptr] = '\0';
 658
 659                         ci = cf_reference_item(parentcs, outercs, name);
 660                         if (!ci || (ci->type != CONF_ITEM_PAIR)) {
 661                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" not found",
 662                                        cf, *lineno, input);
 663                                 return NULL;
 664                         }
 665
 666                         /*
 667                          *  Substitute the value of the variable.
 668                          */
 669                         cp = cf_itemtopair(ci);
 670                         strcpy(p, cp->value);
 671                         p += strlen(p);
 672                         ptr = end + 1;
 673
 674                 } else if (memcmp(ptr, "$ENV{", 5) == 0) {
 675                         char *env;
 676
 677                         ptr += 5;
 678
 679                         /*
 680                          *      Look for trailing '}', and log a
 681                          *      warning for anything that doesn't match,
 682                          *      and exit with a fatal error.
 683                          */
 684                         end = strchr(ptr, '}');
 685                         if (end == NULL) {
 686                                 *p = '\0';
 687                                 radlog(L_INFO, "%s[%d]: Environment variable expansion missing }",
 688                                        cf, *lineno);
 689                                 return NULL;
 690                         }
 691
 692                         /*
 693                          *      Can't really happen because input lines are
 694                          *      capped at 8k, which is sizeof(name)
 695                          */
 696                         if ((end - ptr) >= sizeof(name)) {
 697                                 radlog(L_ERR, "%s[%d]: Environment variable name is too large",
 698                                        cf, *lineno);
 699                                 return NULL;
 700                         }
 701
 702                         memcpy(name, ptr, end - ptr);
 703                         name[end - ptr] = '\0';
 704
 705                         /*
 706                          *      Get the environment variable.
 707                          *      If none exists, then make it an empty string.
 708                          */
 709                         env = getenv(name);
 710                         if (env == NULL) {
 711                                 *name = '\0';
 712                                 env = name;
 713                         }
 714
 715                         strcpy(p, env);
 716                         p += strlen(p);
 717                         ptr = end + 1;
 718
 719                 } else {
 720                         /*
 721                          *      Copy it over verbatim.
 722                          */
 723                         *(p++) = *(ptr++);
 724                 }
 725         } /* loop over all of the input string. */
 726
 727         *p = '\0';
 728
 729         return output;
 730 }
 731
 732
 733 /*
 734  *      Parses an item (not a CONF_ITEM) into the specified format,
 735  *      with a default value.
 736  *
 737  *      Returns -1 on error, 0 for correctly parsed, and 1 if the
 738  *      default value was used.  Note that the default value will be
 739  *      used ONLY if the CONF_PAIR is NULL.
 740  */
 741 int cf_item_parse(CONF_SECTION *cs, const char *name,
 742                   int type, void *data, const char *dflt)
 743 {
 744         int rcode = 0;
 745         char **q;
 746         const char *value;
 747         lrad_ipaddr_t ipaddr;
 748         const CONF_PAIR *cp;
 749         char ipbuf[128];
 750
 751         cp = cf_pair_find(cs, name);
 752         if (cp) {
 753                 value = cp->value;
 754
 755         } else if (!dflt) {
 756                 return 1;       /* nothing to parse, return default value */
 757
 758         } else {
 759                 rcode = 1;
 760                 value = dflt;
 761         }
 762
 763         switch (type) {
 764         case PW_TYPE_BOOLEAN:
 765                 /*
 766                  *      Allow yes/no and on/off
 767                  */
 768                 if ((strcasecmp(value, "yes") == 0) ||
 769                     (strcasecmp(value, "on") == 0)) {
 770                         *(int *)data = 1;
 771                 } else if ((strcasecmp(value, "no") == 0) ||
 772                            (strcasecmp(value, "off") == 0)) {
 773                         *(int *)data = 0;
 774                 } else {
 775                         *(int *)data = 0;
 776                         radlog(L_ERR, "Bad value \"%s\" for boolean variable %s", value, name);
 777                         return -1;
 778                 }
 779                 DEBUG2("\t%s = %s", name, value);
 780                 break;
 781
 782         case PW_TYPE_INTEGER:
 783                 *(int *)data = strtol(value, 0, 0);
 784                 DEBUG2("\t%s = %d", name, *(int *)data);
 785                 break;
 786
 787         case PW_TYPE_STRING_PTR:
 788                 q = (char **) data;
 789                 if (*q != NULL) {
 790                         free(*q);
 791                 }
 792
 793                 /*
 794                  *      Expand variables which haven't already been
 795                  *      expanded automagically when the configuration
 796                  *      file was read.
 797                  */
 798                 if (value == dflt) {
 799                         char buffer[8192];
 800
 801                         int lineno = cs->item.lineno;
 802
 803                         /*
 804                          *      FIXME: sizeof(buffer)?
 805                          */
 806                         value = cf_expand_variables("?",
 807                                                     &lineno,
 808                                                     cs, buffer, value);
 809                         if (!value) return -1;
 810                 }
 811
 812                 DEBUG2("\t%s = \"%s\"", name, value ? value : "(null)");
 813                 *q = value ? strdup(value) : NULL;
 814                 break;
 815
 816                 /*
 817                  *      This is the same as PW_TYPE_STRING_PTR,
 818                  *      except that we also "stat" the file, and
 819                  *      cache the result.
 820                  */
 821         case PW_TYPE_FILENAME:
 822                 q = (char **) data;
 823                 if (*q != NULL) {
 824                         free(*q);
 825                 }
 826
 827                 /*
 828                  *      Expand variables which haven't already been
 829                  *      expanded automagically when the configuration
 830                  *      file was read.
 831                  */
 832                 if (value == dflt) {
 833                         char buffer[8192];
 834
 835                         int lineno = cs->item.lineno;
 836
 837                         /*
 838                          *      FIXME: sizeof(buffer)?
 839                          */
 840                         value = cf_expand_variables("?",
 841                                                     &lineno,
 842                                                     cs, buffer, value);
 843                         if (!value) return -1;
 844                 }
 845
 846                 DEBUG2("\t%s = \"%s\"", name, value ? value : "(null)");
 847                 *q = value ? strdup(value) : NULL;
 848
 849                 /*
 850                  *      And now we "stat" the file.
 851                  */
 852                 if (*q) {
 853                         struct stat buf;
 854
 855                         if (stat(*q, &buf) == 0) {
 856                                 time_t *mtime;
 857
 858                                 mtime = rad_malloc(sizeof(*mtime));
 859                                 *mtime = buf.st_mtime;
 860                                 /* FIXME: error? */
 861                                 cf_data_add_internal(cs, *q, mtime, free,
 862                                                      PW_TYPE_FILENAME);
 863                         }
 864                 }
 865                 break;
 866
 867         case PW_TYPE_IPADDR:
 868                 /*
 869                  *      Allow '*' as any address
 870                  */
 871                 if (strcmp(value, "*") == 0) {
 872                         *(uint32_t *) data = htonl(INADDR_ANY);
 873                         DEBUG2("\t%s = *", name);
 874                         break;
 875                 }
 876                 if (ip_hton(value, AF_INET, &ipaddr) < 0) {
 877                         radlog(L_ERR, "Can't find IP address for host %s", value);
 878                         return -1;
 879                 }
 880                 DEBUG2("\t%s = %s IP address [%s]", name, value,
 881                                ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
 882                 *(uint32_t *) data = ipaddr.ipaddr.ip4addr.s_addr;
 883                 break;
 884
 885         case PW_TYPE_IPV6ADDR:
 886                 if (ip_hton(value, AF_INET6, &ipaddr) < 0) {
 887                         radlog(L_ERR, "Can't find IPv6 address for host %s", value);
 888                         return -1;
 889                 }
 890                 DEBUG2("\t%s = %s IPv6 address [%s]", name, value,
 891                                ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
 892                 memcpy(data, &ipaddr.ipaddr.ip6addr,
 893                        sizeof(ipaddr.ipaddr.ip6addr));
 894                 break;
 895
 896         default:
 897                 radlog(L_ERR, "type %d not supported yet", type);
 898                 return -1;
 899                 break;
 900         } /* switch over variable type */
 901
 902         return rcode;
 903 }
 904
 905 static const char *parse_spaces = "                                                                                                                                                                                                                                                                ";
 906
 907 /*
 908  *      Parse a configuration section into user-supplied variables.
 909  */
 910 int cf_section_parse(CONF_SECTION *cs, void *base,
 911                      const CONF_PARSER *variables)
 912 {
 913         int i;
 914         void *data;
 915
 916         if (!cs->name2) {
 917                 DEBUG2("%.*s%s {", cs->depth, parse_spaces,
 918                        cs->name1);
 919         } else {
 920                 DEBUG2("%.*s%s %s {", cs->depth, parse_spaces,
 921                        cs->name1, cs->name2);
 922         }
 923
 924         /*
 925          *      Handle the known configuration parameters.
 926          */
 927         for (i = 0; variables[i].name != NULL; i++) {
 928                 /*
 929                  *      Handle subsections specially
 930                  */
 931                 if (variables[i].type == PW_TYPE_SUBSECTION) {
 932                         const CONF_SECTION *subcs;
 933                         subcs = cf_section_sub_find(cs, variables[i].name);
 934
 935                         /*
 936                          *      If the configuration section is NOT there,
 937                          *      then ignore it.
 938                          *
 939                          *      FIXME! This is probably wrong... we should
 940                          *      probably set the items to their default values.
 941                          */
 942                         if (!subcs) continue;
 943
 944                         if (!variables[i].dflt) {
 945                                 DEBUG2("Internal sanity check 1 failed in cf_section_parse");
 946                                 goto error;
 947                         }
 948
 949                         if (cf_section_parse(subcs, base,
 950                                              (const CONF_PARSER *) variables[i].dflt) < 0) {
 951                                 goto error;
 952                         }
 953                         continue;
 954                 } /* else it's a CONF_PAIR */
 955
 956                 if (variables[i].data) {
 957                         data = variables[i].data; /* prefer this. */
 958                 } else if (base) {
 959                         data = ((char *)base) + variables[i].offset;
 960                 } else {
 961                         DEBUG2("Internal sanity check 2 failed in cf_section_parse");
 962                         goto error;
 963                 }
 964
 965                 /*
 966                  *      Parse the pair we found, or a default value.
 967                  */
 968                 if (cf_item_parse(cs, variables[i].name, variables[i].type,
 969                                   data, variables[i].dflt) < 0) {
 970                         goto error;
 971                 }
 972         } /* for all variables in the configuration section */
 973
 974         DEBUG2("%.*s}", cs->depth, parse_spaces);
 975
 976         cs->base = base;
 977         cs->variables = variables;
 978
 979         return 0;
 980
 981  error:
 982         DEBUG2("%.*s}", cs->depth, parse_spaces);
 983         cf_section_parse_free(base, variables);
 984         return -1;
 985 }
 986
 987
 988 /*
 989  *      Sanity check the "if" or "elsif", presuming that the first '('
 990  *      has already been eaten.
 991  *
 992  *      We're not really parsing it here, just checking if it's mostly
 993  *      well-formed.
 994  */
 995 static int condition_looks_ok(const char **ptr)
 996 {
 997         int num_braces = 1;
 998         int quote = 0;
 999         const char *p = *ptr;
1000
1001         while (*p) {
1002                 if (quote) {
1003                         if (*p == quote) {
1004                                 p++;
1005                                 quote = 0;
1006                                 continue;
1007                         }
1008
1009                         if (*p == '\\') {
1010                                 if (!p[1]) {
1011                                         return 0; /* no trailing slash */
1012                                 }
1013                                 p += 2;
1014                                 continue;
1015                         }
1016                         p++;
1017                         continue;
1018                 }
1019
1020                 switch (*p) {
1021                 case '\\':
1022                         if (!p[1]) {
1023                                 return 0; /* no trailing slash */
1024                         }
1025                         p += 2;
1026                         continue;
1027
1028                 case '(':
1029                         num_braces++;
1030                         p++;
1031                         continue;
1032
1033                 case ')':
1034                         if (num_braces == 1) {
1035                                 const char *q = p + 1;
1036
1037                                 /*
1038                                  *      Validate that there isn't much
1039                                  *      else after the closing brace.
1040                                  */
1041                                 while ((*q == ' ') || (*q == '\t')) q++;
1042
1043                                 /*
1044                                  *      Parse error.
1045                                  */
1046                                 if (*q != '{') {
1047                                         return 0;
1048                                 }
1049
1050                                 *ptr = p + 1; /* include the trailing ')' */
1051                                 return 1;
1052                         }
1053                         num_braces--;
1054                         p++;
1055                         continue;
1056
1057                 case '"':
1058                 case '\'':
1059                 case '/':
1060                 case '`':
1061                         quote = *p;
1062                         /* FALL-THROUGH */
1063
1064                 default:
1065                         p++;
1066                         break;
1067                 }
1068         }
1069
1070         return 0;
1071 }
1072
1073
1074 /*
1075  *      Read a part of the config file.
1076  */
1077 static int cf_section_read(const char *filename, int *lineno, FILE *fp,
1078                            CONF_SECTION *current)
1079
1080 {
1081         CONF_SECTION *this, *css;
1082         CONF_PAIR *cpn;
1083         char *ptr;
1084         const char *value;
1085         char buf[8192];
1086         char buf1[8192];
1087         char buf2[8192];
1088         char buf3[8192];
1089         int t1, t2, t3;
1090         char *cbuf = buf;
1091         int len;
1092
1093         this = current;         /* add items here */
1094
1095         /*
1096          *      Read, checking for line continuations ('\\' at EOL)
1097          */
1098         for (;;) {
1099                 int eof;
1100
1101                 /*
1102                  *      Get data, and remember if we are at EOF.
1103                  */
1104                 eof = (fgets(cbuf, sizeof(buf) - (cbuf - buf), fp) == NULL);
1105                 (*lineno)++;
1106
1107                 len = strlen(cbuf);
1108
1109                 /*
1110                  *      We've filled the buffer, and there isn't
1111                  *      a CR in it.  Die!
1112                  */
1113                 if ((cbuf[len - 1] != '\n') && !feof(fp)) {
1114                         radlog(L_ERR, "%s[%d]: Line too long",
1115                                filename, *lineno);
1116                         return -1;
1117                 }
1118
1119                 /*
1120                  *  Check for continuations.
1121                  */
1122                 if (cbuf[len - 1] == '\n') len--;
1123
1124                 /*
1125                  *      Last character is '\\'.  Over-write it,
1126                  *      and read another line.
1127                  */
1128                 if ((len > 0) && (cbuf[len - 1] == '\\')) {
1129                         if (len >= (sizeof(buf) - 5)) {
1130                                 radlog(L_ERR, "%s[%d]: Line too long",
1131                                        filename, *lineno);
1132                                 return -1;
1133                         }
1134
1135                         cbuf[len - 1] = '\0';
1136                         cbuf += len - 1;
1137                         continue;
1138                 }
1139
1140                 /*
1141                  *  We're at EOF, and haven't read anything.  Stop.
1142                  */
1143                 if (eof && (cbuf == buf)) {
1144                         break;
1145                 }
1146
1147                 ptr = cbuf = buf;
1148                 t1 = gettoken(&ptr, buf1, sizeof(buf1));
1149
1150                 if ((*buf1 == '#') || (*buf1 == '\0')) {
1151                         continue;
1152                 }
1153
1154                 /*
1155                  *      The caller eats "name1 name2 {", and calls us
1156                  *      for the data inside of the section.  So if we
1157                  *      receive a closing brace, then it must mean the
1158                  *      end of the section.
1159                  */
1160                if (t1 == T_RCBRACE) {
1161                        if (this == current) {
1162                                radlog(L_ERR, "%s[%d]: Too many closing braces",
1163                                       filename, *lineno);
1164                                return -1;
1165
1166                        }
1167                        this = this->item.parent;
1168                        continue;
1169                 }
1170
1171                 /*
1172                  *      Allow for $INCLUDE files
1173                  *
1174                  *      This *SHOULD* work for any level include.
1175                  *      I really really really hate this file.  -cparker
1176                  */
1177                if ((strcasecmp(buf1, "$INCLUDE") == 0) ||
1178                    (strcasecmp(buf1, "$-INCLUDE") == 0)) {
1179                         t2 = getword(&ptr, buf2, sizeof(buf2));
1180
1181                         value = cf_expand_variables(filename, lineno, this, buf, buf2);
1182                         if (!value) return -1;
1183
1184 #ifdef HAVE_DIRENT_H
1185                         /*
1186                          *      $INCLUDE foo/
1187                          *
1188                          *      Include ALL non-"dot" files in the directory.
1189                          *      careful!
1190                          */
1191                         if (value[strlen(value) - 1] == '/') {
1192                                 DIR             *dir;
1193                                 struct dirent   *dp;
1194                                 struct stat stat_buf;
1195
1196                                 DEBUG2( "Config:   including files in directory: %s", value );
1197                                 dir = opendir(value);
1198                                 if (!dir) {
1199                                         radlog(L_ERR, "%s[%d]: Error reading directory %s: %s",
1200                                                filename, *lineno, value,
1201                                                strerror(errno));
1202                                         return -1;
1203                                 }
1204
1205                                 /*
1206                                  *      Read the directory, ignoring "." files.
1207                                  */
1208                                 while ((dp = readdir(dir)) != NULL) {
1209                                         const char *p;
1210
1211                                         if (dp->d_name[0] == '.') continue;
1212
1213                                         /*
1214                                          *      Check for valid characters
1215                                          */
1216                                         for (p = dp->d_name; *p != '\0'; p++) {
1217                                                 if (isalpha((int)*p) ||
1218                                                     isdigit((int)*p) ||
1219                                                     (*p == '-') ||
1220                                                     (*p == '_') ||
1221                                                     (*p == '.')) continue;
1222                                                 break;
1223                                         }
1224                                         if (*p != '\0') continue;
1225
1226                                         snprintf(buf2, sizeof(buf2), "%s%s",
1227                                                  value, dp->d_name);
1228                                         if ((stat(buf2, &stat_buf) != 0) ||
1229                                             S_ISDIR(stat_buf.st_mode)) continue;
1230                                         /*
1231                                          *      Read the file into the current
1232                                          *      configuration sectoin.
1233                                          */
1234                                         if (cf_file_include(buf2, this) < 0) {
1235                                                 closedir(dir);
1236                                                 return -1;
1237                                         }
1238                                 }
1239                                 closedir(dir);
1240                         }  else
1241 #endif
1242                         { /* it was a normal file */
1243                                 if (buf1[1] == '-') {
1244                                         struct stat statbuf;
1245
1246                                         if (stat(value, &statbuf) < 0) {
1247                                                 DEBUG("WARNING: Not including file %s: %s", value, strerror(errno));
1248                                                 continue;
1249                                         }
1250                                 }
1251
1252                                 if (cf_file_include(value, this) < 0) {
1253                                         return -1;
1254                                 }
1255                         }
1256                         continue;
1257                 } /* we were in an include */
1258
1259                if (strcasecmp(buf1, "$template") == 0) {
1260                        CONF_ITEM *ci;
1261                        CONF_SECTION *parentcs;
1262                        t2 = getword(&ptr, buf2, sizeof(buf2));
1263
1264                        parentcs = cf_top_section(current);
1265
1266                        ci = cf_reference_item(parentcs, this, buf2);
1267                        if (!ci || (ci->type != CONF_ITEM_SECTION)) {
1268                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" not found",
1269                                        filename, *lineno, buf2);
1270                                 return -1;
1271                        }
1272
1273                        if (this->template) {
1274                                 radlog(L_ERR, "%s[%d]: Section already has a template",
1275                                        filename, *lineno);
1276                                 return -1;
1277                        }
1278
1279                        this->template = cf_itemtosection(ci);
1280                        continue;
1281                }
1282
1283                 /*
1284                  *      Ensure that the user can't add CONF_PAIRs
1285                  *      with 'internal' names;
1286                  */
1287                 if (buf1[0] == '_') {
1288                         radlog(L_ERR, "%s[%d]: Illegal configuration pair name \"%s\"",
1289                                         filename, *lineno, buf1);
1290                         return -1;
1291                 }
1292
1293                 /*
1294                  *      Grab the next token.
1295                  */
1296                 t2 = gettoken(&ptr, buf2, sizeof(buf2));
1297                 switch (t2) {
1298                 case T_EOL:
1299                 case T_HASH:
1300                         t2 = T_OP_EQ;
1301                         value = NULL;
1302                         goto do_set;
1303
1304                 case T_OP_ADD:
1305                 case T_OP_CMP_EQ:
1306                 case T_OP_SUB:
1307                 case T_OP_LE:
1308                 case T_OP_GE:
1309                         if (!this || (strcmp(this->name1, "update") != 0)) {
1310                                 radlog(L_ERR, "%s[%d]: Invalid operator in assignment",
1311                                        filename, *lineno);
1312                                 return -1;
1313                         }
1314
1315                 case T_OP_EQ:
1316                 case T_OP_SET:
1317                 do_set:
1318                         t3 = getstring(&ptr, buf3, sizeof(buf3));
1319
1320                         /*
1321                          *      Handle variable substitution via ${foo}
1322                          */
1323                         if ((t3 == T_BARE_WORD) ||
1324                             (t3 == T_DOUBLE_QUOTED_STRING)) {
1325                                 value = cf_expand_variables(filename, lineno, this,
1326                                                             buf, buf3);
1327                                 if (!value) return -1;
1328                         } else if ((t3 == T_EOL) ||
1329                                    (t3 == T_HASH)) {
1330                                 value = NULL;
1331                         } else {
1332                                 value = buf3;
1333                         }
1334
1335                         /*
1336                          *      Add this CONF_PAIR to our CONF_SECTION
1337                          */
1338                         cpn = cf_pair_alloc(buf1, value, t2, t3, this);
1339                         cpn->item.filename = filename;
1340                         cpn->item.lineno = *lineno;
1341                         cf_item_add(this, cf_pairtoitem(cpn));
1342                         continue;
1343
1344                         /*
1345                          *      This horrible code is here to support
1346                          *      if/then/else failover in the
1347                          *      authorize, etc. sections.  It makes no
1348                          *      sense anywhere else.
1349                          */
1350                 case T_LBRACE:
1351                         if ((strcmp(buf1, "if") == 0) ||
1352                             (strcmp(buf1, "elsif") == 0)) {
1353                                 const char *end = ptr;
1354                                 CONF_SECTION *server;
1355
1356                                 if (!condition_looks_ok(&end)) {
1357                                         radlog(L_ERR, "%s[%d]: Parse error in condition at: %s",
1358                                                filename, *lineno, ptr);
1359                                         return -1;
1360                                 }
1361
1362                                 if ((end - ptr) >= (sizeof(buf2) - 1)) {
1363                                         radlog(L_ERR, "%s[%d]: Statement too complicated after \"%s\"",
1364                                                filename, *lineno, buf1);
1365                                         return -1;
1366                                 }
1367
1368                                 /*
1369                                  *      More sanity checking.  This is
1370                                  *      getting to be a horrible hack.
1371                                  */
1372                                 server = this;
1373                                 while (server) {
1374                                         if (strcmp(server->name1, "server") == 0) break;
1375                                         server = server->item.parent;
1376                                 }
1377
1378                                 if (0 && !server) {
1379                                         radlog(L_ERR, "%s[%d]: Processing directives such as \"%s\" cannot be used here.",
1380                                                filename, *lineno, buf1);
1381                                         return -1;
1382                                 }
1383
1384                                 buf2[0] = '(';
1385                                 memcpy(buf2 + 1, ptr, end - ptr);
1386                                 buf2[end - ptr + 1] = '\0';
1387                                 ptr = end + 1;
1388                                 t2 = T_BARE_WORD;
1389                                 goto section_alloc;
1390
1391                         } else {
1392                                 radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1393                                        filename, *lineno, buf1);
1394                                 return -1;
1395                         }
1396
1397                         /* FALL-THROUGH */
1398
1399                         /*
1400                          *      No '=', must be a section or sub-section.
1401                          */
1402                 case T_BARE_WORD:
1403                 case T_DOUBLE_QUOTED_STRING:
1404                 case T_SINGLE_QUOTED_STRING:
1405                         t3 = gettoken(&ptr, buf3, sizeof(buf3));
1406                         if (t3 != T_LCBRACE) {
1407                                 radlog(L_ERR, "%s[%d]: Expecting section start brace '{' after \"%s %s\"",
1408                                        filename, *lineno, buf1, buf2);
1409                                 return -1;
1410                         }
1411
1412                 case T_LCBRACE:
1413                 section_alloc:
1414                         css = cf_section_alloc(buf1,
1415                                                t2 == T_LCBRACE ? NULL : buf2,
1416                                                this);
1417                         if (!css) {
1418                                 radlog(L_ERR, "%s[%d]: Failed allocating memory for section",
1419                                                 filename, *lineno);
1420                                 return -1;
1421                         }
1422                         cf_item_add(this, cf_sectiontoitem(css));
1423                         css->item.filename = filename;
1424                         css->item.lineno = *lineno;
1425
1426                         /*
1427                          *      The current section is now the child section.
1428                          */
1429                         this = css;
1430                         continue;
1431
1432                 default:
1433                         radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1434                                filename, *lineno, buf1);
1435                         return -1;
1436                 }
1437         }
1438
1439         /*
1440          *      See if EOF was unexpected ..
1441          */
1442         if (feof(fp) && (this != current)) {
1443                 radlog(L_ERR, "%s[%d]: EOF reached without closing brace for section %s starting at line %d",
1444                        filename, *lineno,
1445                        cf_section_name1(this), cf_section_lineno(this));
1446                 return -1;
1447         }
1448
1449         return 0;
1450 }
1451
1452 /*
1453  *      Include one config file in another.
1454  */
1455 int cf_file_include(const char *filename, CONF_SECTION *cs)
1456 {
1457         FILE            *fp;
1458         int             lineno = 0;
1459         struct stat     statbuf;
1460         time_t          *mtime;
1461         CONF_DATA       *cd;
1462
1463         DEBUG2( "Config:   including file: %s", filename);
1464
1465         if (stat(filename, &statbuf) == 0) {
1466 #ifdef S_IWOTH
1467                 if ((statbuf.st_mode & S_IWOTH) != 0) {
1468                         radlog(L_ERR|L_CONS, "Configuration file %s is globally writable.  Refusing to start due to insecure configuration.",
1469                                filename);
1470                         return -1;
1471                 }
1472 #endif
1473
1474 #ifdef S_IROTH
1475                 if (0 && (statbuf.st_mode & S_IROTH) != 0) {
1476                         radlog(L_ERR|L_CONS, "Configuration file %s is globally readable.  Refusing to start due to insecure configuration.",
1477                                filename);
1478                         return -1;
1479                 }
1480 #endif
1481         }
1482
1483         fp = fopen(filename, "r");
1484         if (!fp) {
1485                 radlog(L_ERR|L_CONS, "Unable to open file \"%s\": %s",
1486                        filename, strerror(errno));
1487                 return -1;
1488         }
1489
1490         /*
1491          *      Add the filename to the section
1492          */
1493         mtime = rad_malloc(sizeof(*mtime));
1494         *mtime = statbuf.st_mtime;
1495
1496         if (cf_data_add_internal(cs, filename, mtime, free,
1497                                  PW_TYPE_FILENAME) < 0) {
1498                 radlog(L_ERR|L_CONS, "Internal error open file \"%s\"",
1499                        filename);
1500                 return -1;
1501         }
1502
1503         cd = cf_data_find_internal(cs, filename, PW_TYPE_FILENAME);
1504         if (!cd) {
1505                 radlog(L_ERR|L_CONS, "Internal error open file \"%s\"",
1506                        filename);
1507                 return -1;
1508         }
1509
1510         /*
1511          *      Read the section.  It's OK to have EOF without a
1512          *      matching close brace.
1513          */
1514         if (cf_section_read(cd->name, &lineno, fp, cs) < 0) {
1515                 fclose(fp);
1516                 return -1;
1517         }
1518
1519         fclose(fp);
1520         return 0;
1521 }
1522
1523 /*
1524  *      Bootstrap a config file.
1525  */
1526 CONF_SECTION *cf_file_read(const char *filename)
1527 {
1528         CONF_SECTION *cs;
1529
1530         cs = cf_section_alloc("main", NULL, NULL);
1531         if (!cs) return NULL;
1532
1533         if (cf_file_include(filename, cs) < 0) {
1534                 cf_section_free(&cs);
1535                 return NULL;
1536         }
1537
1538         return cs;
1539 }
1540
1541 /*
1542  * Return a CONF_PAIR within a CONF_SECTION.
1543  */
1544 CONF_PAIR *cf_pair_find(const CONF_SECTION *cs, const char *name)
1545 {
1546         CONF_ITEM       *ci;
1547         CONF_PAIR       *cp = NULL;
1548
1549         if (!cs) cs = mainconfig.config;
1550
1551         /*
1552          *      Find the name in the tree, for speed.
1553          */
1554         if (name) {
1555                 CONF_PAIR mycp;
1556
1557                 mycp.attr = name;
1558                 cp = rbtree_finddata(cs->pair_tree, &mycp);
1559         } else {
1560                 /*
1561                  *      Else find the first one that matches
1562                  */
1563                 for (ci = cs->children; ci; ci = ci->next) {
1564                         if (ci->type == CONF_ITEM_PAIR) {
1565                                 return cf_itemtopair(ci);
1566                         }
1567                 }
1568         }
1569
1570         if (cp || !cs->template) return cp;
1571
1572         return cf_pair_find(cs->template, name);
1573 }
1574
1575 /*
1576  * Return the attr of a CONF_PAIR
1577  */
1578
1579 char *cf_pair_attr(CONF_PAIR *pair)
1580 {
1581         return (pair ? pair->attr : NULL);
1582 }
1583
1584 /*
1585  * Return the value of a CONF_PAIR
1586  */
1587
1588 char *cf_pair_value(CONF_PAIR *pair)
1589 {
1590         return (pair ? pair->value : NULL);
1591 }
1592
1593 /*
1594  *      Copied here for error reporting.
1595  */
1596 extern void librad_log(const char *, ...);
1597
1598 /*
1599  * Turn a CONF_PAIR into a VALUE_PAIR
1600  * For now, ignore the "value_type" field...
1601  */
1602 VALUE_PAIR *cf_pairtovp(CONF_PAIR *pair)
1603 {
1604         DICT_ATTR *da;
1605         VALUE_PAIR *vp;
1606
1607         if (!pair) {
1608                 librad_log("Internal error");
1609                 return NULL;
1610         }
1611
1612         da = dict_attrbyname(pair->attr);
1613         if (!da) {
1614                 librad_log("Unknown attribute %s", pair->attr);
1615                 return NULL;
1616         }
1617
1618         if (!pair->value) {
1619                 librad_log("No value given for attribute %s", pair->attr);
1620                 return NULL;
1621         }
1622
1623         vp = pairalloc(da);
1624         if (!vp) {
1625                 librad_log("Out of memory");
1626                 return NULL;
1627         }
1628
1629         vp->operator = pair->operator;
1630
1631         if ((pair->value_type == T_BARE_WORD) ||
1632             (pair->value_type == T_SINGLE_QUOTED_STRING)) {
1633                 if (!pairparsevalue(vp, pair->value)) {
1634                         pairfree(&vp);
1635                         return NULL;
1636                 }
1637                 vp->flags.do_xlat = 0;
1638         } else {
1639                 vp->flags.do_xlat = 1;
1640         }
1641
1642         return vp;
1643 }
1644
1645 /*
1646  * Return the first label of a CONF_SECTION
1647  */
1648
1649 const char *cf_section_name1(const CONF_SECTION *cs)
1650 {
1651         return (cs ? cs->name1 : NULL);
1652 }
1653
1654 /*
1655  * Return the second label of a CONF_SECTION
1656  */
1657
1658 const char *cf_section_name2(const CONF_SECTION *cs)
1659 {
1660         return (cs ? cs->name2 : NULL);
1661 }
1662
1663 /*
1664  * Find a value in a CONF_SECTION
1665  */
1666 char *cf_section_value_find(const CONF_SECTION *cs, const char *attr)
1667 {
1668         CONF_PAIR       *cp;
1669
1670         cp = cf_pair_find(cs, attr);
1671
1672         return (cp ? cp->value : NULL);
1673 }
1674
1675 /*
1676  * Return the next pair after a CONF_PAIR
1677  * with a certain name (char *attr) If the requested
1678  * attr is NULL, any attr matches.
1679  */
1680
1681 CONF_PAIR *cf_pair_find_next(const CONF_SECTION *cs,
1682                              const CONF_PAIR *pair, const char *attr)
1683 {
1684         CONF_ITEM       *ci;
1685
1686         /*
1687          * If pair is NULL this must be a first time run
1688          * Find the pair with correct name
1689          */
1690
1691         if (pair == NULL){
1692                 return cf_pair_find(cs, attr);
1693         }
1694
1695         ci = cf_pairtoitem(pair)->next;
1696
1697         for (; ci; ci = ci->next) {
1698                 if (ci->type != CONF_ITEM_PAIR)
1699                         continue;
1700                 if (attr == NULL || strcmp(cf_itemtopair(ci)->attr, attr) == 0)
1701                         break;
1702         }
1703
1704         return cf_itemtopair(ci);
1705 }
1706
1707 /*
1708  * Find a CONF_SECTION, or return the root if name is NULL
1709  */
1710
1711 CONF_SECTION *cf_section_find(const char *name)
1712 {
1713         if (name)
1714                 return cf_section_sub_find(mainconfig.config, name);
1715         else
1716                 return mainconfig.config;
1717 }
1718
1719 /*
1720  * Find a sub-section in a section
1721  */
1722
1723 CONF_SECTION *cf_section_sub_find(const CONF_SECTION *cs, const char *name)
1724 {
1725         CONF_ITEM *ci;
1726
1727         /*
1728          *      Do the fast lookup if possible.
1729          */
1730         if (name && cs->section_tree) {
1731                 CONF_SECTION mycs;
1732
1733                 mycs.name1 = name;
1734                 mycs.name2 = NULL;
1735                 return rbtree_finddata(cs->section_tree, &mycs);
1736         }
1737
1738         for (ci = cs->children; ci; ci = ci->next) {
1739                 if (ci->type != CONF_ITEM_SECTION)
1740                         continue;
1741                 if (strcmp(cf_itemtosection(ci)->name1, name) == 0)
1742                         break;
1743         }
1744
1745         return cf_itemtosection(ci);
1746
1747 }
1748
1749
1750 /*
1751  *      Find a CONF_SECTION with both names.
1752  */
1753 CONF_SECTION *cf_section_sub_find_name2(const CONF_SECTION *cs,
1754                                         const char *name1, const char *name2)
1755 {
1756         CONF_ITEM    *ci;
1757
1758         if (!cs) cs = mainconfig.config;
1759
1760         if (name1 && (cs->section_tree)) {
1761                 CONF_SECTION mycs, *master_cs;
1762
1763                 mycs.name1 = name1;
1764                 mycs.name2 = name2;
1765
1766                 master_cs = rbtree_finddata(cs->section_tree, &mycs);
1767                 if (master_cs) {
1768                         return rbtree_finddata(master_cs->name2_tree, &mycs);
1769                 }
1770         }
1771
1772         /*
1773          *      Else do it the old-fashioned way.
1774          */
1775         for (ci = cs->children; ci; ci = ci->next) {
1776                 CONF_SECTION *subcs;
1777
1778                 if (ci->type != CONF_ITEM_SECTION)
1779                         continue;
1780
1781                 subcs = cf_itemtosection(ci);
1782                 if (!name1) {
1783                         if (!subcs->name2) {
1784                                 if (strcmp(subcs->name1, name2) == 0) break;
1785                         } else {
1786                                 if (strcmp(subcs->name2, name2) == 0) break;
1787                         }
1788                         continue; /* don't do the string comparisons below */
1789                 }
1790
1791                 if ((strcmp(subcs->name1, name1) == 0) &&
1792                     (subcs->name2 != NULL) &&
1793                     (strcmp(subcs->name2, name2) == 0))
1794                         break;
1795         }
1796
1797         return cf_itemtosection(ci);
1798 }
1799
1800 /*
1801  * Return the next subsection after a CONF_SECTION
1802  * with a certain name1 (char *name1). If the requested
1803  * name1 is NULL, any name1 matches.
1804  */
1805
1806 CONF_SECTION *cf_subsection_find_next(CONF_SECTION *section,
1807                                       CONF_SECTION *subsection,
1808                                       const char *name1)
1809 {
1810         CONF_ITEM       *ci;
1811
1812         /*
1813          * If subsection is NULL this must be a first time run
1814          * Find the subsection with correct name
1815          */
1816
1817         if (subsection == NULL){
1818                 ci = section->children;
1819         } else {
1820                 ci = cf_sectiontoitem(subsection)->next;
1821         }
1822
1823         for (; ci; ci = ci->next) {
1824                 if (ci->type != CONF_ITEM_SECTION)
1825                         continue;
1826                 if ((name1 == NULL) ||
1827                     (strcmp(cf_itemtosection(ci)->name1, name1) == 0))
1828                         break;
1829         }
1830
1831         return cf_itemtosection(ci);
1832 }
1833
1834
1835 /*
1836  * Return the next section after a CONF_SECTION
1837  * with a certain name1 (char *name1). If the requested
1838  * name1 is NULL, any name1 matches.
1839  */
1840
1841 CONF_SECTION *cf_section_find_next(CONF_SECTION *section,
1842                                    CONF_SECTION *subsection,
1843                                    const char *name1)
1844 {
1845         if (!section->item.parent) return NULL;
1846
1847         return cf_subsection_find_next(section->item.parent, subsection, name1);
1848 }
1849
1850 /*
1851  * Return the next item after a CONF_ITEM.
1852  */
1853
1854 CONF_ITEM *cf_item_find_next(CONF_SECTION *section, CONF_ITEM *item)
1855 {
1856         /*
1857          * If item is NULL this must be a first time run
1858          * Return the first item
1859          */
1860
1861         if (item == NULL) {
1862                 return section->children;
1863         } else {
1864                 return item->next;
1865         }
1866 }
1867
1868 int cf_section_lineno(CONF_SECTION *section)
1869 {
1870         return cf_sectiontoitem(section)->lineno;
1871 }
1872
1873 const char *cf_pair_filename(CONF_PAIR *pair)
1874 {
1875         return cf_pairtoitem(pair)->filename;
1876 }
1877
1878 const char *cf_section_filename(CONF_SECTION *section)
1879 {
1880         return cf_sectiontoitem(section)->filename;
1881 }
1882
1883 int cf_pair_lineno(CONF_PAIR *pair)
1884 {
1885         return cf_pairtoitem(pair)->lineno;
1886 }
1887
1888 int cf_item_is_section(CONF_ITEM *item)
1889 {
1890         return item->type == CONF_ITEM_SECTION;
1891 }
1892 int cf_item_is_pair(CONF_ITEM *item)
1893 {
1894         return item->type == CONF_ITEM_PAIR;
1895 }
1896
1897
1898 static CONF_DATA *cf_data_alloc(CONF_SECTION *parent, const char *name,
1899                                 void *data, void (*data_free)(void *))
1900 {
1901         CONF_DATA *cd;
1902
1903         cd = rad_malloc(sizeof(*cd));
1904         memset(cd, 0, sizeof(*cd));
1905
1906         cd->item.type = CONF_ITEM_DATA;
1907         cd->item.parent = parent;
1908         cd->name = strdup(name);
1909         cd->data = data;
1910         cd->free = data_free;
1911
1912         return cd;
1913 }
1914
1915
1916 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
1917                                    int flag)
1918 {
1919         if (!cs || !name) return NULL;
1920
1921         /*
1922          *      Find the name in the tree, for speed.
1923          */
1924         if (cs->data_tree) {
1925                 CONF_DATA mycd;
1926
1927                 mycd.name = name;
1928                 mycd.flag = flag;
1929                 return rbtree_finddata(cs->data_tree, &mycd);
1930         }
1931
1932         return NULL;
1933 }
1934
1935 /*
1936  *      Find data from a particular section.
1937  */
1938 void *cf_data_find(CONF_SECTION *cs, const char *name)
1939 {
1940         CONF_DATA *cd = cf_data_find_internal(cs, name, 0);
1941
1942         if (cd) return cd->data;
1943         return NULL;
1944 }
1945
1946
1947 /*
1948  *      Add named data to a configuration section.
1949  */
1950 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
1951                                 void *data, void (*data_free)(void *),
1952                                 int flag)
1953 {
1954         CONF_DATA *cd;
1955
1956         if (!cs || !name) return -1;
1957
1958         /*
1959          *      Already exists.  Can't add it.
1960          */
1961         if (cf_data_find_internal(cs, name, flag) != NULL) return -1;
1962
1963         cd = cf_data_alloc(cs, name, data, data_free);
1964         if (!cd) return -1;
1965         cd->flag = flag;
1966
1967         cf_item_add(cs, cf_datatoitem(cd));
1968
1969         return 0;
1970 }
1971
1972 /*
1973  *      Add named data to a configuration section.
1974  */
1975 int cf_data_add(CONF_SECTION *cs, const char *name,
1976                 void *data, void (*data_free)(void *))
1977 {
1978         return cf_data_add_internal(cs, name, data, data_free, 0);
1979 }
1980
1981
1982 /*
1983  *      Copy CONF_DATA from src to dst
1984  */
1985 static void cf_section_copy_data(CONF_SECTION *s, CONF_SECTION *d)
1986 {
1987
1988         CONF_ITEM *cd, *next, **last;
1989
1990         /*
1991          *      Don't check if s->data_tree is NULL.  It's child
1992          *      sections may have data, even if this section doesn't.
1993          */
1994
1995         rad_assert(d->data_tree == NULL);
1996         d->data_tree = s->data_tree;
1997         s->data_tree = NULL;
1998
1999         /*
2000          *      Walk through src, moving CONF_ITEM_DATA
2001          *      to dst, by hand.
2002          */
2003         last = &(s->children);
2004         for (cd = s->children; cd != NULL; cd = next) {
2005                 next = cd->next;
2006
2007                 /*
2008                  *      Recursively copy data from child sections.
2009                  */
2010                 if (cd->type == CONF_ITEM_SECTION) {
2011                         CONF_SECTION *s1, *d1;
2012
2013                         s1 = cf_itemtosection(cd);
2014                         d1 = cf_section_sub_find_name2(d, s1->name1, s1->name2);
2015                         if (d1) {
2016                                 cf_section_copy_data(s1, d1);
2017                         }
2018                         last = &(cd->next);
2019                         continue;
2020                 }
2021
2022                 /*
2023                  *      Not conf data, remember last ptr.
2024                  */
2025                 if (cd->type != CONF_ITEM_DATA) {
2026                         last = &(cd->next);
2027                         continue;
2028                 }
2029
2030                 /*
2031                  *      Remove it from the src list
2032                  */
2033                 *last = cd->next;
2034                 cd->next = NULL;
2035
2036                 /*
2037                  *      Add it to the dst list
2038                  */
2039                 if (!d->children) {
2040                         rad_assert(d->tail == NULL);
2041                         d->children = cd;
2042                 } else {
2043                         rad_assert(d->tail != NULL);
2044                         d->tail->next = cd;
2045                 }
2046                 d->tail = cd;
2047         }
2048 }
2049
2050 /*
2051  *      For a CONF_DATA element, stat the filename, if necessary.
2052  */
2053 static int filename_stat(void *context, void *data)
2054 {
2055         struct stat buf;
2056         CONF_DATA *cd = data;
2057
2058         context = context;      /* -Wunused */
2059
2060         if (cd->flag != PW_TYPE_FILENAME) return 0;
2061
2062         if (stat(cd->name, &buf) < 0) return -1;
2063
2064         if (buf.st_mtime != *(time_t *) cd->data) return -1;
2065
2066         return 0;
2067 }
2068
2069
2070 /*
2071  *      Compare two CONF_SECTIONS.  The items MUST be in the same
2072  *      order.
2073  */
2074 static int cf_section_cmp(CONF_SECTION *a, CONF_SECTION *b)
2075 {
2076         CONF_ITEM *ca = a->children;
2077         CONF_ITEM *cb = b->children;
2078
2079         while (1) {
2080                 CONF_PAIR *pa, *pb;
2081
2082                 /*
2083                  *      Done.  Stop.
2084                  */
2085                 if (!ca && !cb) break;
2086
2087                 /*
2088                  *      Skip CONF_DATA.
2089                  */
2090                 if (ca && ca->type == CONF_ITEM_DATA) {
2091                         ca = ca->next;
2092                         continue;
2093                 }
2094                 if (cb && cb->type == CONF_ITEM_DATA) {
2095                         cb = cb->next;
2096                         continue;
2097                 }
2098
2099                 /*
2100                  *      One is smaller than the other.  Exit.
2101                  */
2102                 if (!ca || !cb) return 0;
2103
2104                 if (ca->type != cb->type) return 0;
2105
2106                 /*
2107                  *      Deal with subsections.
2108                  */
2109                 if (ca->type == CONF_ITEM_SECTION) {
2110                         CONF_SECTION *sa = cf_itemtosection(ca);
2111                         CONF_SECTION *sb = cf_itemtosection(cb);
2112
2113                         if (!cf_section_cmp(sa, sb)) return 0;
2114                         goto next;
2115                 }
2116
2117                 rad_assert(ca->type == CONF_ITEM_PAIR);
2118
2119                 pa = cf_itemtopair(ca);
2120                 pb = cf_itemtopair(cb);
2121
2122                 /*
2123                  *      Different attr and/or value, Exit.
2124                  */
2125                 if ((strcmp(pa->attr, pb->attr) != 0) ||
2126                     (strcmp(pa->value, pb->value) != 0)) return 0;
2127
2128
2129                 /*
2130                  *      And go to the next element.
2131                  */
2132         next:
2133                 ca = ca->next;
2134                 cb = cb->next;
2135         }
2136
2137         /*
2138          *      Walk over the CONF_DATA, stat'ing PW_TYPE_FILENAME.
2139          */
2140         if (a->data_tree &&
2141             (rbtree_walk(a->data_tree, InOrder, filename_stat, NULL) != 0)) {
2142                 return 0;
2143         }
2144
2145         /*
2146          *      They must be the same, say so.
2147          */
2148         return 1;
2149 }
2150
2151
2152 /*
2153  *      Migrate CONF_DATA from one section to another.
2154  */
2155 int cf_section_migrate(CONF_SECTION *dst, CONF_SECTION *src)
2156 {
2157         CONF_ITEM *ci;
2158         CONF_SECTION *s, *d;
2159
2160         for (ci = src->children; ci != NULL; ci = ci->next) {
2161                 if (ci->type != CONF_ITEM_SECTION)
2162                         continue;
2163
2164                 s = cf_itemtosection(ci);
2165                 d = cf_section_sub_find_name2(dst, s->name1, s->name2);
2166
2167                 if (!d) continue; /* not in new one, don't migrate it */
2168
2169                 /*
2170                  *      A section of the same name is in BOTH src & dst,
2171                  *      compare the CONF_PAIR's.  If they're all the same,
2172                  *      then copy the CONF_DATA from one to the other.
2173                  */
2174                 if (cf_section_cmp(s, d)) {
2175                         cf_section_copy_data(s, d);
2176                 }
2177         }
2178
2179         return 1;               /* rcode means anything? */
2180 }
2181
2182 int cf_section_template(CONF_SECTION *cs, CONF_SECTION *template)
2183 {
2184         if (!cs || !template || cs->template || template->template) return -1;
2185
2186         cs->template = template;
2187
2188         return 0;
2189 }
2190
2191
2192 /*
2193  *      This is here to make the rest of the code easier to read.  It
2194  *      ties conffile.c to log.c, but it means we don't have to
2195  *      pollute the
2196  */
2197 void cf_log_err(CONF_ITEM *ci, const char *fmt, ...)
2198 {
2199         va_list ap;
2200         char buffer[256];
2201
2202         va_start(ap, fmt);
2203         vsnprintf(buffer, sizeof(buffer), fmt, ap);
2204         va_end(ap);
2205
2206         radlog(L_ERR, "%s[%d]: %s", ci->filename, ci->lineno, buffer);
2207 }
2208
2209
2210 #if 0
2211 /*
2212  * JMG dump_config tries to dump the config structure in a readable format
2213  *
2214 */
2215
2216 static int dump_config_section(CONF_SECTION *cs, int indent)
2217 {
2218         CONF_SECTION    *scs;
2219         CONF_PAIR       *cp;
2220         CONF_ITEM       *ci;
2221
2222         /* The DEBUG macro doesn't let me
2223          *   for(i=0;i<indent;++i) debugputchar('\t');
2224          * so I had to get creative. --Pac. */
2225
2226         for (ci = cs->children; ci; ci = ci->next) {
2227                 switch (ci->type) {
2228                 case CONF_ITEM_PAIR:
2229                         cp=cf_itemtopair(ci);
2230                         DEBUG("%.*s%s = %s",
2231                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2232                                 cp->attr, cp->value);
2233                         break;
2234
2235                 case CONF_ITEM_SECTION:
2236                         scs=cf_itemtosection(ci);
2237                         DEBUG("%.*s%s %s%s{",
2238                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2239                                 scs->name1,
2240                                 scs->name2 ? scs->name2 : "",
2241                                 scs->name2 ?  " " : "");
2242                         dump_config_section(scs, indent+1);
2243                         DEBUG("%.*s}",
2244                                 indent, "\t\t\t\t\t\t\t\t\t\t\t");
2245                         break;
2246
2247                 default:        /* FIXME: Do more! */
2248                         break;
2249                 }
2250         }
2251
2252         return 0;
2253 }
2254
2255 int dump_config(CONF_SECTION *cs)
2256 {
2257         return dump_config_section(cs, 0);
2258 }
2259 #endif