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 #endif
  38
  39 #ifdef HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  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         const char *attr;
  62         const char *value;
  63         FR_TOKEN operator;
  64         FR_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 int cf_log_config = 1;
 103 int cf_log_modules = 1;
 104
 105 /*
 106  *      Isolate the scary casts in these tiny provably-safe functions
 107  */
 108 CONF_PAIR *cf_itemtopair(CONF_ITEM *ci)
 109 {
 110         if (ci == NULL)
 111                 return NULL;
 112         rad_assert(ci->type == CONF_ITEM_PAIR);
 113         return (CONF_PAIR *)ci;
 114 }
 115 CONF_SECTION *cf_itemtosection(CONF_ITEM *ci)
 116 {
 117         if (ci == NULL)
 118                 return NULL;
 119         rad_assert(ci->type == CONF_ITEM_SECTION);
 120         return (CONF_SECTION *)ci;
 121 }
 122 CONF_ITEM *cf_pairtoitem(CONF_PAIR *cp)
 123 {
 124         if (cp == NULL)
 125                 return NULL;
 126         return (CONF_ITEM *)cp;
 127 }
 128 CONF_ITEM *cf_sectiontoitem(CONF_SECTION *cs)
 129 {
 130         if (cs == NULL)
 131                 return NULL;
 132         return (CONF_ITEM *)cs;
 133 }
 134
 135 static CONF_DATA *cf_itemtodata(CONF_ITEM *ci)
 136 {
 137         if (ci == NULL)
 138                 return NULL;
 139         rad_assert(ci->type == CONF_ITEM_DATA);
 140         return (CONF_DATA *)ci;
 141 }
 142 static CONF_ITEM *cf_datatoitem(CONF_DATA *cd)
 143 {
 144         if (cd == NULL)
 145                 return NULL;
 146         return (CONF_ITEM *)cd;
 147 }
 148
 149 /*
 150  *      Create a new CONF_PAIR
 151  */
 152 static CONF_PAIR *cf_pair_alloc(const char *attr, const char *value,
 153                                 FR_TOKEN operator, FR_TOKEN value_type,
 154                                 CONF_SECTION *parent)
 155 {
 156         char *p;
 157         size_t attr_len, value_len = 0;
 158         CONF_PAIR *cp;
 159
 160         if (!attr) return NULL;
 161         attr_len = strlen(attr) + 1;
 162         if (value) value_len = strlen(value) + 1;
 163
 164         p = rad_malloc(sizeof(*cp) + attr_len + value_len);
 165
 166         cp = (CONF_PAIR *) p;
 167         memset(cp, 0, sizeof(*cp));
 168         cp->item.type = CONF_ITEM_PAIR;
 169         cp->item.parent = parent;
 170
 171         p += sizeof(*cp);
 172         memcpy(p, attr, attr_len);
 173         cp->attr = p;
 174
 175         if (value) {
 176                 p += attr_len;
 177                 memcpy(p, value, value_len);
 178                 cp->value = p;
 179         }
 180         cp->value_type = value_type;
 181         cp->operator = operator;
 182
 183         return cp;
 184 }
 185
 186 /*
 187  *      Free a CONF_PAIR
 188  */
 189 void cf_pair_free(CONF_PAIR **cp)
 190 {
 191         if (!cp || !*cp) return;
 192
 193         /*
 194          *      attr && value are allocated contiguous with cp.
 195          */
 196
 197 #ifndef NDEBUG
 198         memset(*cp, 0, sizeof(*cp));
 199 #endif
 200         free(*cp);
 201
 202         *cp = NULL;
 203 }
 204
 205
 206 static void cf_data_free(CONF_DATA **cd)
 207 {
 208         if (!cd || !*cd) return;
 209
 210         /* name is allocated contiguous with cd */
 211         if (!(*cd)->free) {
 212                 free((*cd)->data);
 213         } else {
 214                 ((*cd)->free)((*cd)->data);
 215         }
 216 #ifndef NDEBUG
 217         memset(*cd, 0, sizeof(*cd));
 218 #endif
 219         free(*cd);
 220         *cd = NULL;
 221 }
 222
 223 /*
 224  *      rbtree callback function
 225  */
 226 static int pair_cmp(const void *a, const void *b)
 227 {
 228         const CONF_PAIR *one = a;
 229         const CONF_PAIR *two = b;
 230
 231         return strcmp(one->attr, two->attr);
 232 }
 233
 234
 235 /*
 236  *      rbtree callback function
 237  */
 238 static int section_cmp(const void *a, const void *b)
 239 {
 240         const CONF_SECTION *one = a;
 241         const CONF_SECTION *two = b;
 242
 243         return strcmp(one->name1, two->name1);
 244 }
 245
 246
 247 /*
 248  *      rbtree callback function
 249  */
 250 static int name2_cmp(const void *a, const void *b)
 251 {
 252         const CONF_SECTION *one = a;
 253         const CONF_SECTION *two = b;
 254
 255         rad_assert(strcmp(one->name1, two->name1) == 0);
 256
 257         if (!one->name2 && !two->name2) return 0;
 258         if (!one->name2) return -1;
 259         if (!two->name2) return +1;
 260
 261         return strcmp(one->name2, two->name2);
 262 }
 263
 264
 265 /*
 266  *      rbtree callback function
 267  */
 268 static int data_cmp(const void *a, const void *b)
 269 {
 270         int rcode;
 271
 272         const CONF_DATA *one = a;
 273         const CONF_DATA *two = b;
 274
 275         rcode = one->flag - two->flag;
 276         if (rcode != 0) return rcode;
 277
 278         return strcmp(one->name, two->name);
 279 }
 280
 281
 282 /*
 283  *      Free strings we've parsed into data structures.
 284  */
 285 void cf_section_parse_free(CONF_SECTION *cs, void *base)
 286 {
 287         int i;
 288         const CONF_PARSER *variables = cs->variables;
 289
 290         /*
 291          *      Don't automatically free the strings if we're being
 292          *      called from a module.  This is also for clients.c,
 293          *      where client_free() expects to be able to free the
 294          *      client structure.  If we moved everything to key off
 295          *      of the config files, we might solve some problems...
 296          */
 297         if (!variables) return;
 298
 299         /*
 300          *      Free up dynamically allocated string pointers.
 301          */
 302         for (i = 0; variables[i].name != NULL; i++) {
 303                 char **p;
 304
 305                 if ((variables[i].type != PW_TYPE_STRING_PTR) &&
 306                     (variables[i].type != PW_TYPE_FILENAME)) {
 307                         continue;
 308                 }
 309
 310                 /*
 311                  *      No base struct offset, data must be the pointer.
 312                  *      If data doesn't exist, ignore the entry, there
 313                  *      must be something wrong.
 314                  */
 315                 if (!base) {
 316                         if (!variables[i].data) {
 317                                 continue;
 318                         }
 319
 320                         p = (char **) variables[i].data;;
 321
 322                 } else if (variables[i].data) {
 323                         p = (char **) variables[i].data;;
 324
 325                 } else {
 326                         p = (char **) (((char *)base) + variables[i].offset);
 327                 }
 328
 329                 free(*p);
 330                 *p = NULL;
 331         }
 332 }
 333
 334
 335 /*
 336  *      Free a CONF_SECTION
 337  */
 338 void cf_section_free(CONF_SECTION **cs)
 339 {
 340         CONF_ITEM       *ci, *next;
 341
 342         if (!cs || !*cs) return;
 343
 344         cf_section_parse_free(*cs, (*cs)->base);
 345
 346         for (ci = (*cs)->children; ci; ci = next) {
 347                 next = ci->next;
 348
 349                 switch (ci->type) {
 350                 case CONF_ITEM_PAIR: {
 351                                 CONF_PAIR *pair = cf_itemtopair(ci);
 352                                 cf_pair_free(&pair);
 353                         }
 354                         break;
 355
 356                 case CONF_ITEM_SECTION: {
 357                                 CONF_SECTION *section = cf_itemtosection(ci);
 358                                 cf_section_free(&section);
 359                         }
 360                         break;
 361
 362                 case CONF_ITEM_DATA: {
 363                                 CONF_DATA *data = cf_itemtodata(ci);
 364                                 cf_data_free(&data);
 365                         }
 366                         break;
 367
 368                 default:        /* should really be an error. */
 369                         break;
 370                 }
 371         }
 372
 373         /*
 374          *      Name1 and name2 are allocated contiguous with
 375          *      cs.
 376          */
 377         if ((*cs)->pair_tree)
 378                 rbtree_free((*cs)->pair_tree);
 379         if ((*cs)->section_tree)
 380                 rbtree_free((*cs)->section_tree);
 381         if ((*cs)->name2_tree)
 382                 rbtree_free((*cs)->name2_tree);
 383         if ((*cs)->data_tree)
 384                 rbtree_free((*cs)->data_tree);
 385
 386         /*
 387          * And free the section
 388          */
 389 #ifndef NDEBUG
 390         memset(*cs, 0, sizeof(*cs));
 391 #endif
 392         free(*cs);
 393
 394         *cs = NULL;
 395 }
 396
 397
 398 /*
 399  *      Allocate a CONF_SECTION
 400  */
 401 static CONF_SECTION *cf_section_alloc(const char *name1, const char *name2,
 402                                       CONF_SECTION *parent)
 403 {
 404         size_t name1_len, name2_len = 0;
 405         char *p;
 406         CONF_SECTION    *cs;
 407
 408         if (!name1) return NULL;
 409
 410         name1_len = strlen(name1) + 1;
 411         if (name2) name2_len = strlen(name2) + 1;
 412
 413         p = rad_malloc(sizeof(*cs) + name1_len + name2_len);
 414
 415         cs = (CONF_SECTION *) p;
 416         memset(cs, 0, sizeof(*cs));
 417         cs->item.type = CONF_ITEM_SECTION;
 418         cs->item.parent = parent;
 419
 420         p += sizeof(*cs);
 421         memcpy(p, name1, name1_len);
 422         cs->name1 = p;
 423
 424         if (name2 && *name2) {
 425                 p += name1_len;
 426                 memcpy(p, name2, name2_len);
 427                 cs->name2 = p;
 428         }
 429
 430         cs->pair_tree = rbtree_create(pair_cmp, NULL, 0);
 431         if (!cs->pair_tree) {
 432                 cf_section_free(&cs);
 433                 return NULL;
 434         }
 435
 436         /*
 437          *      Don't create a data tree, it may not be needed.
 438          */
 439
 440         /*
 441          *      Don't create the section tree here, it may not
 442          *      be needed.
 443          */
 444
 445         if (parent) cs->depth = parent->depth + 1;
 446
 447         return cs;
 448 }
 449
 450 /*
 451  *      Replace pair in a given section with a new pair,
 452  *      of the given value.
 453  */
 454 int cf_pair_replace(CONF_SECTION *cs, CONF_PAIR *cp, const char *value)
 455 {
 456         CONF_PAIR *newp;
 457         CONF_ITEM *ci, *cn, **last;
 458
 459         newp = cf_pair_alloc(cp->attr, value, cp->operator, cp->value_type,
 460                              cs);
 461         if (!newp) return -1;
 462
 463         ci = cf_pairtoitem(cp);
 464         cn = cf_pairtoitem(newp);
 465
 466         /*
 467          *      Find the old one from the linked list, and replace it
 468          *      with the new one.
 469          */
 470         for (last = &cs->children; (*last) != NULL; last = &(*last)->next) {
 471                 if (*last == ci) {
 472                         cn->next = (*last)->next;
 473                         *last = cn;
 474                         ci->next = NULL;
 475                         break;
 476                 }
 477         }
 478
 479         rbtree_deletebydata(cs->pair_tree, ci);
 480
 481         rbtree_insert(cs->pair_tree, cn);
 482
 483         return 0;
 484 }
 485
 486
 487 /*
 488  *      Add an item to a configuration section.
 489  */
 490 static void cf_item_add(CONF_SECTION *cs, CONF_ITEM *ci)
 491 {
 492         if (!cs->children) {
 493                 rad_assert(cs->tail == NULL);
 494                 cs->children = ci;
 495         } else {
 496                 rad_assert(cs->tail != NULL);
 497                 cs->tail->next = ci;
 498         }
 499
 500         /*
 501          *      Update the trees (and tail) for each item added.
 502          */
 503         for (/* nothing */; ci != NULL; ci = ci->next) {
 504                 cs->tail = ci;
 505
 506                 /*
 507                  *      For fast lookups, pair's and sections get
 508                  *      added to rbtree's.
 509                  */
 510                 switch (ci->type) {
 511                         case CONF_ITEM_PAIR:
 512                                 rbtree_insert(cs->pair_tree, ci);
 513                                 break;
 514
 515                         case CONF_ITEM_SECTION: {
 516                                 CONF_SECTION *cs_new = cf_itemtosection(ci);
 517
 518                                 if (!cs->section_tree) {
 519                                         cs->section_tree = rbtree_create(section_cmp, NULL, 0);
 520                                         if (!cs->section_tree) {
 521                                                 radlog(L_ERR, "Out of memory");
 522                                                 _exit(1);
 523                                         }
 524                                 }
 525
 526                                 rbtree_insert(cs->section_tree, cs_new);
 527
 528                                 /*
 529                                  *      Two names: find the named instance.
 530                                  */
 531                                 {
 532                                         CONF_SECTION *old_cs;
 533
 534                                         /*
 535                                          *      Find the FIRST
 536                                          *      CONF_SECTION having
 537                                          *      the given name1, and
 538                                          *      create a new tree
 539                                          *      under it.
 540                                          */
 541                                         old_cs = rbtree_finddata(cs->section_tree, cs_new);
 542                                         if (!old_cs) return; /* this is a bad error! */
 543
 544                                         if (!old_cs->name2_tree) {
 545                                                 old_cs->name2_tree = rbtree_create(name2_cmp,
 546                                                                                    NULL, 0);
 547                                         }
 548                                         if (old_cs->name2_tree) {
 549                                                 rbtree_insert(old_cs->name2_tree, cs_new);
 550                                         }
 551                                 } /* had a name2 */
 552                                 break;
 553                         } /* was a section */
 554
 555                         case CONF_ITEM_DATA:
 556                                 if (!cs->data_tree) {
 557                                         cs->data_tree = rbtree_create(data_cmp, NULL, 0);
 558                                 }
 559                                 if (cs->data_tree) {
 560                                         rbtree_insert(cs->data_tree, ci);
 561                                 }
 562                                 break;
 563
 564                         default: /* FIXME: assert & error! */
 565                                 break;
 566
 567                 } /* switch over conf types */
 568         } /* loop over ci */
 569 }
 570
 571
 572 CONF_ITEM *cf_reference_item(const CONF_SECTION *parentcs,
 573                              CONF_SECTION *outercs,
 574                              const char *ptr)
 575 {
 576         CONF_PAIR *cp;
 577         CONF_SECTION *next;
 578         const CONF_SECTION *cs = outercs;
 579         char name[8192];
 580         char *p;
 581
 582         strlcpy(name, ptr, sizeof(name));
 583         p = name;
 584
 585         /*
 586          *      ".foo" means "foo from the current section"
 587          */
 588         if (*p == '.') {
 589                 p++;
 590
 591                 /*
 592                  *      ..foo means "foo from the section
 593                  *      enclosing this section" (etc.)
 594                  */
 595                 while (*p == '.') {
 596                         if (cs->item.parent)
 597                                 cs = cs->item.parent;
 598                         p++;
 599                 }
 600
 601                 /*
 602                  *      "foo.bar.baz" means "from the root"
 603                  */
 604         } else if (strchr(p, '.') != NULL) {
 605                 if (!parentcs) goto no_such_item;
 606
 607                 cs = parentcs;
 608         }
 609
 610         while (*p) {
 611                 char *q, *r;
 612
 613                 r = strchr(p, '[');
 614                 q = strchr(p, '.');
 615                 if (!r && !q) break;
 616
 617                 if (r && q > r) q = NULL;
 618                 if (q && q < r) r = NULL;
 619
 620                 /*
 621                  *      Split off name2.
 622                  */
 623                 if (r) {
 624                         q = strchr(r + 1, ']');
 625                         if (!q) return NULL; /* parse error */
 626
 627                         /*
 628                          *      Points to foo[bar]xx: parse error,
 629                          *      it should be foo[bar] or foo[bar].baz
 630                          */
 631                         if (q[1] && q[1] != '.') goto no_such_item;
 632
 633                         *r = '\0';
 634                         *q = '\0';
 635                         next = cf_section_sub_find_name2(cs, p, r + 1);
 636                         *r = '[';
 637                         *q = ']';
 638
 639                         /*
 640                          *      Points to a named instance of a section.
 641                          */
 642                         if (!q[1]) {
 643                                 if (!next) goto no_such_item;
 644                                 return cf_sectiontoitem(next);
 645                         }
 646
 647                         q++;    /* ensure we skip the ']' and '.' */
 648
 649                 } else {
 650                         *q = '\0';
 651                         next = cf_section_sub_find(cs, p);
 652                         *q = '.';
 653                 }
 654
 655                 if (!next) break; /* it MAY be a pair in this section! */
 656
 657                 cs = next;
 658                 p = q + 1;
 659         }
 660
 661         if (!*p) goto no_such_item;
 662
 663  retry:
 664         /*
 665          *      Find it in the current referenced
 666          *      section.
 667          */
 668         cp = cf_pair_find(cs, p);
 669         if (cp) return cf_pairtoitem(cp);
 670
 671         next = cf_section_sub_find(cs, p);
 672         if (next) return cf_sectiontoitem(next);
 673
 674         /*
 675          *      "foo" is "in the current section, OR in main".
 676          */
 677         if ((p == name) && (parentcs != NULL) && (cs != parentcs)) {
 678                 cs = parentcs;
 679                 goto retry;
 680         }
 681
 682 no_such_item:
 683         DEBUG2("WARNING: No such configuration item %s", ptr);
 684         return NULL;
 685 }
 686
 687
 688 CONF_SECTION *cf_top_section(CONF_SECTION *cs)
 689 {
 690         while (cs->item.parent != NULL) {
 691                 cs = cs->item.parent;
 692         }
 693
 694         return cs;
 695 }
 696
 697
 698 /*
 699  *      Expand the variables in an input string.
 700  */
 701 static const char *cf_expand_variables(const char *cf, int *lineno,
 702                                        CONF_SECTION *outercs,
 703                                        char *output, const char *input)
 704 {
 705         char *p;
 706         const char *end, *ptr;
 707         const CONF_SECTION *parentcs;
 708         char name[8192];
 709
 710         /*
 711          *      Find the master parent conf section.
 712          *      We can't use mainconfig.config, because we're in the
 713          *      process of re-building it, and it isn't set up yet...
 714          */
 715         parentcs = cf_top_section(outercs);
 716
 717         p = output;
 718         ptr = input;
 719         while (*ptr) {
 720                 /*
 721                  *      Ignore anything other than "${"
 722                  */
 723                 if ((*ptr == '$') && (ptr[1] == '{')) {
 724                         CONF_ITEM *ci;
 725                         CONF_PAIR *cp;
 726
 727                         /*
 728                          *      FIXME: Add support for ${foo:-bar},
 729                          *      like in xlat.c
 730                          */
 731
 732                         /*
 733                          *      Look for trailing '}', and log a
 734                          *      warning for anything that doesn't match,
 735                          *      and exit with a fatal error.
 736                          */
 737                         end = strchr(ptr, '}');
 738                         if (end == NULL) {
 739                                 *p = '\0';
 740                                 radlog(L_INFO, "%s[%d]: Variable expansion missing }",
 741                                        cf, *lineno);
 742                                 return NULL;
 743                         }
 744
 745                         ptr += 2;
 746
 747                         /*
 748                          *      Can't really happen because input lines are
 749                          *      capped at 8k, which is sizeof(name)
 750                          */
 751                         if ((size_t) (end - ptr) >= sizeof(name)) {
 752                                 radlog(L_ERR, "%s[%d]: Reference string is too large",
 753                                        cf, *lineno);
 754                                 return NULL;
 755                         }
 756
 757                         memcpy(name, ptr, end - ptr);
 758                         name[end - ptr] = '\0';
 759
 760                         ci = cf_reference_item(parentcs, outercs, name);
 761                         if (!ci || (ci->type != CONF_ITEM_PAIR)) {
 762                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" not found",
 763                                        cf, *lineno, input);
 764                                 return NULL;
 765                         }
 766
 767                         /*
 768                          *  Substitute the value of the variable.
 769                          */
 770                         cp = cf_itemtopair(ci);
 771                         if (!cp->value) {
 772                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" has no value",
 773                                        cf, *lineno, input);
 774                                 return NULL;
 775                         }
 776                         strcpy(p, cp->value);
 777                         p += strlen(p);
 778                         ptr = end + 1;
 779
 780                 } else if (memcmp(ptr, "$ENV{", 5) == 0) {
 781                         char *env;
 782
 783                         ptr += 5;
 784
 785                         /*
 786                          *      Look for trailing '}', and log a
 787                          *      warning for anything that doesn't match,
 788                          *      and exit with a fatal error.
 789                          */
 790                         end = strchr(ptr, '}');
 791                         if (end == NULL) {
 792                                 *p = '\0';
 793                                 radlog(L_INFO, "%s[%d]: Environment variable expansion missing }",
 794                                        cf, *lineno);
 795                                 return NULL;
 796                         }
 797
 798                         /*
 799                          *      Can't really happen because input lines are
 800                          *      capped at 8k, which is sizeof(name)
 801                          */
 802                         if ((size_t) (end - ptr) >= sizeof(name)) {
 803                                 radlog(L_ERR, "%s[%d]: Environment variable name is too large",
 804                                        cf, *lineno);
 805                                 return NULL;
 806                         }
 807
 808                         memcpy(name, ptr, end - ptr);
 809                         name[end - ptr] = '\0';
 810
 811                         /*
 812                          *      Get the environment variable.
 813                          *      If none exists, then make it an empty string.
 814                          */
 815                         env = getenv(name);
 816                         if (env == NULL) {
 817                                 *name = '\0';
 818                                 env = name;
 819                         }
 820
 821                         strcpy(p, env);
 822                         p += strlen(p);
 823                         ptr = end + 1;
 824
 825                 } else {
 826                         /*
 827                          *      Copy it over verbatim.
 828                          */
 829                         *(p++) = *(ptr++);
 830                 }
 831         } /* loop over all of the input string. */
 832
 833         *p = '\0';
 834
 835         return output;
 836 }
 837
 838
 839 /*
 840  *      Parses an item (not a CONF_ITEM) into the specified format,
 841  *      with a default value.
 842  *
 843  *      Returns -1 on error, 0 for correctly parsed, and 1 if the
 844  *      default value was used.  Note that the default value will be
 845  *      used ONLY if the CONF_PAIR is NULL.
 846  */
 847 int cf_item_parse(CONF_SECTION *cs, const char *name,
 848                   int type, void *data, const char *dflt)
 849 {
 850         int rcode = 0;
 851         char **q;
 852         const char *value;
 853         fr_ipaddr_t ipaddr;
 854         const CONF_PAIR *cp = NULL;
 855         char ipbuf[128];
 856
 857         if (cs) cp = cf_pair_find(cs, name);
 858         if (cp) {
 859                 value = cp->value;
 860
 861         } else if (!dflt) {
 862                 return 1;       /* nothing to parse, return default value */
 863
 864         } else {
 865                 rcode = 1;
 866                 value = dflt;
 867         }
 868
 869         if (!value) {
 870                 return 0;
 871         }
 872
 873         switch (type) {
 874         case PW_TYPE_BOOLEAN:
 875                 /*
 876                  *      Allow yes/no and on/off
 877                  */
 878                 if ((strcasecmp(value, "yes") == 0) ||
 879                     (strcasecmp(value, "on") == 0)) {
 880                         *(int *)data = 1;
 881                 } else if ((strcasecmp(value, "no") == 0) ||
 882                            (strcasecmp(value, "off") == 0)) {
 883                         *(int *)data = 0;
 884                 } else {
 885                         *(int *)data = 0;
 886                         radlog(L_ERR, "Bad value \"%s\" for boolean variable %s", value, name);
 887                         return -1;
 888                 }
 889                 cf_log_info(cs, "\t%s = %s", name, value);
 890                 break;
 891
 892         case PW_TYPE_INTEGER:
 893                 *(int *)data = strtol(value, 0, 0);
 894                 cf_log_info(cs, "\t%s = %d", name, *(int *)data);
 895                 break;
 896
 897         case PW_TYPE_STRING_PTR:
 898                 q = (char **) data;
 899                 if (*q != NULL) {
 900                         free(*q);
 901                 }
 902
 903                 /*
 904                  *      Expand variables which haven't already been
 905                  *      expanded automagically when the configuration
 906                  *      file was read.
 907                  */
 908                 if (value == dflt) {
 909                         char buffer[8192];
 910
 911                         int lineno = 0;
 912
 913                         if (cs) lineno = cs->item.lineno;
 914
 915                         /*
 916                          *      FIXME: sizeof(buffer)?
 917                          */
 918                         value = cf_expand_variables("?",
 919                                                     &lineno,
 920                                                     cs, buffer, value);
 921                         if (!value) return -1;
 922                 }
 923
 924                 cf_log_info(cs, "\t%s = \"%s\"", name, value ? value : "(null)");
 925                 *q = value ? strdup(value) : NULL;
 926                 break;
 927
 928                 /*
 929                  *      This is the same as PW_TYPE_STRING_PTR,
 930                  *      except that we also "stat" the file, and
 931                  *      cache the result.
 932                  */
 933         case PW_TYPE_FILENAME:
 934                 q = (char **) data;
 935                 if (*q != NULL) {
 936                         free(*q);
 937                 }
 938
 939                 /*
 940                  *      Expand variables which haven't already been
 941                  *      expanded automagically when the configuration
 942                  *      file was read.
 943                  */
 944                 if (value == dflt) {
 945                         char buffer[8192];
 946
 947                         int lineno = 0;
 948
 949                         if (cs) lineno = cs->item.lineno;
 950
 951                         /*
 952                          *      FIXME: sizeof(buffer)?
 953                          */
 954                         value = cf_expand_variables("?",
 955                                                     &lineno,
 956                                                     cs, buffer, value);
 957                         if (!value) return -1;
 958                 }
 959
 960                 cf_log_info(cs, "\t%s = \"%s\"", name, value ? value : "(null)");
 961                 *q = value ? strdup(value) : NULL;
 962
 963                 /*
 964                  *      And now we "stat" the file.
 965                  *
 966                  *      FIXME: This appears to leak memory on exit,
 967                  *      and we don't use this information.  So it's
 968                  *      commented out for now.
 969                  */
 970                 if (0 && *q) {
 971                         struct stat buf;
 972
 973                         if (stat(*q, &buf) == 0) {
 974                                 time_t *mtime;
 975
 976                                 mtime = rad_malloc(sizeof(*mtime));
 977                                 *mtime = buf.st_mtime;
 978                                 /* FIXME: error? */
 979                                 cf_data_add_internal(cs, *q, mtime, free,
 980                                                      PW_TYPE_FILENAME);
 981                         }
 982                 }
 983                 break;
 984
 985         case PW_TYPE_IPADDR:
 986                 /*
 987                  *      Allow '*' as any address
 988                  */
 989                 if (strcmp(value, "*") == 0) {
 990                         *(uint32_t *) data = htonl(INADDR_ANY);
 991                         cf_log_info(cs, "\t%s = *", name);
 992                         break;
 993                 }
 994                 if (ip_hton(value, AF_INET, &ipaddr) < 0) {
 995                         radlog(L_ERR, "Can't find IP address for host %s", value);
 996                         return -1;
 997                 }
 998
 999                 if (strspn(value, "0123456789.") == strlen(value)) {
1000                         cf_log_info(cs, "\t%s = %s", name, value);
1001                 } else {
1002                         cf_log_info(cs, "\t%s = %s IP address [%s]", name, value,
1003                                ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
1004                 }
1005                 *(uint32_t *) data = ipaddr.ipaddr.ip4addr.s_addr;
1006                 break;
1007
1008         case PW_TYPE_IPV6ADDR:
1009                 if (ip_hton(value, AF_INET6, &ipaddr) < 0) {
1010                         radlog(L_ERR, "Can't find IPv6 address for host %s", value);
1011                         return -1;
1012                 }
1013                 cf_log_info(cs, "\t%s = %s IPv6 address [%s]", name, value,
1014                                ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
1015                 memcpy(data, &ipaddr.ipaddr.ip6addr,
1016                        sizeof(ipaddr.ipaddr.ip6addr));
1017                 break;
1018
1019         default:
1020                 radlog(L_ERR, "type %d not supported yet", type);
1021                 return -1;
1022                 break;
1023         } /* switch over variable type */
1024
1025         return rcode;
1026 }
1027
1028 static const char *parse_spaces = "                                                                                                                                                                                                                                                                ";
1029
1030 /*
1031  *      Parse a configuration section into user-supplied variables.
1032  */
1033 int cf_section_parse(CONF_SECTION *cs, void *base,
1034                      const CONF_PARSER *variables)
1035 {
1036         int i;
1037         void *data;
1038
1039         cs->variables = variables; /* this doesn't hurt anything */
1040
1041         if (!cs->name2) {
1042                 cf_log_info(cs, "%.*s%s {", cs->depth, parse_spaces,
1043                        cs->name1);
1044         } else {
1045                 cf_log_info(cs, "%.*s%s %s {", cs->depth, parse_spaces,
1046                        cs->name1, cs->name2);
1047         }
1048
1049         /*
1050          *      Handle the known configuration parameters.
1051          */
1052         for (i = 0; variables[i].name != NULL; i++) {
1053                 /*
1054                  *      Handle subsections specially
1055                  */
1056                 if (variables[i].type == PW_TYPE_SUBSECTION) {
1057                         CONF_SECTION *subcs;
1058                         subcs = cf_section_sub_find(cs, variables[i].name);
1059
1060                         /*
1061                          *      If the configuration section is NOT there,
1062                          *      then ignore it.
1063                          *
1064                          *      FIXME! This is probably wrong... we should
1065                          *      probably set the items to their default values.
1066                          */
1067                         if (!subcs) continue;
1068
1069                         if (!variables[i].dflt) {
1070                                 DEBUG2("Internal sanity check 1 failed in cf_section_parse");
1071                                 goto error;
1072                         }
1073
1074                         if (cf_section_parse(subcs, base,
1075                                              (const CONF_PARSER *) variables[i].dflt) < 0) {
1076                                 goto error;
1077                         }
1078                         continue;
1079                 } /* else it's a CONF_PAIR */
1080
1081                 if (variables[i].data) {
1082                         data = variables[i].data; /* prefer this. */
1083                 } else if (base) {
1084                         data = ((char *)base) + variables[i].offset;
1085                 } else {
1086                         DEBUG2("Internal sanity check 2 failed in cf_section_parse");
1087                         goto error;
1088                 }
1089
1090                 /*
1091                  *      Parse the pair we found, or a default value.
1092                  */
1093                 if (cf_item_parse(cs, variables[i].name, variables[i].type,
1094                                   data, variables[i].dflt) < 0) {
1095                         goto error;
1096                 }
1097         } /* for all variables in the configuration section */
1098
1099         cf_log_info(cs, "%.*s}", cs->depth, parse_spaces);
1100
1101         cs->base = base;
1102
1103         return 0;
1104
1105  error:
1106         cf_log_info(cs, "%.*s}", cs->depth, parse_spaces);
1107         cf_section_parse_free(cs, base);
1108         return -1;
1109 }
1110
1111
1112 /*
1113  *      Sanity check the "if" or "elsif", presuming that the first '('
1114  *      has already been eaten.
1115  *
1116  *      We're not really parsing it here, just checking if it's mostly
1117  *      well-formed.
1118  */
1119 static int condition_looks_ok(const char **ptr)
1120 {
1121         int num_braces = 1;
1122         int quote = 0;
1123         const char *p = *ptr;
1124
1125         while (*p) {
1126                 if (quote) {
1127                         if (*p == quote) {
1128                                 p++;
1129                                 quote = 0;
1130                                 continue;
1131                         }
1132
1133                         if (*p == '\\') {
1134                                 if (!p[1]) {
1135                                         return 0; /* no trailing slash */
1136                                 }
1137                                 p += 2;
1138                                 continue;
1139                         }
1140                         p++;
1141                         continue;
1142                 }
1143
1144                 switch (*p) {
1145                 case '\\':
1146                         if (!p[1]) {
1147                                 return 0; /* no trailing slash */
1148                         }
1149                         p += 2;
1150                         continue;
1151
1152                 case '(':
1153                         num_braces++;
1154                         p++;
1155                         continue;
1156
1157                 case ')':
1158                         if (num_braces == 1) {
1159                                 const char *q = p + 1;
1160
1161                                 /*
1162                                  *      Validate that there isn't much
1163                                  *      else after the closing brace.
1164                                  */
1165                                 while ((*q == ' ') || (*q == '\t')) q++;
1166
1167                                 /*
1168                                  *      Parse error.
1169                                  */
1170                                 if (*q != '{') {
1171                                         return 0;
1172                                 }
1173
1174                                 *ptr = p + 1; /* include the trailing ')' */
1175                                 return 1;
1176                         }
1177                         num_braces--;
1178                         p++;
1179                         continue;
1180
1181                 case '"':
1182                 case '\'':
1183                 case '/':
1184                 case '`':
1185                         quote = *p;
1186                         /* FALL-THROUGH */
1187
1188                 default:
1189                         p++;
1190                         break;
1191                 }
1192         }
1193
1194         return 0;
1195 }
1196
1197
1198 static const char *cf_local_file(CONF_SECTION *cs, const char *local,
1199                                  char *buffer, size_t bufsize)
1200 {
1201         size_t dirsize;
1202         const char *p;
1203         CONF_SECTION *parentcs = cf_top_section(cs);
1204
1205         p = strrchr(parentcs->item.filename, FR_DIR_SEP);
1206         if (!p) return local;
1207
1208         dirsize = (p - parentcs->item.filename) + 1;
1209
1210         if ((dirsize + strlen(local)) >= bufsize) {
1211                 return NULL;
1212         }
1213
1214         memcpy(buffer, parentcs->item.filename, dirsize);
1215         strlcpy(buffer + dirsize, local, bufsize - dirsize);
1216
1217         return buffer;
1218 }
1219
1220
1221 /*
1222  *      Read a part of the config file.
1223  */
1224 static int cf_section_read(const char *filename, int *lineno, FILE *fp,
1225                            CONF_SECTION *current)
1226
1227 {
1228         CONF_SECTION *this, *css;
1229         CONF_PAIR *cpn;
1230         const char *ptr;
1231         const char *value;
1232         char buf[8192];
1233         char buf1[8192];
1234         char buf2[8192];
1235         char buf3[8192];
1236         int t1, t2, t3;
1237         char *cbuf = buf;
1238         size_t len;
1239
1240         this = current;         /* add items here */
1241
1242         /*
1243          *      Read, checking for line continuations ('\\' at EOL)
1244          */
1245         for (;;) {
1246                 int at_eof;
1247
1248                 /*
1249                  *      Get data, and remember if we are at EOF.
1250                  */
1251                 at_eof = (fgets(cbuf, sizeof(buf) - (cbuf - buf), fp) == NULL);
1252                 (*lineno)++;
1253
1254                 /*
1255                  *      We read the entire 8k worth of data: complain.
1256                  *      Note that we don't care if the last character
1257                  *      is \n: it's still forbidden.  This means that
1258                  *      the maximum allowed length of text is 8k-1, which
1259                  *      should be plenty.
1260                  */
1261                 len = strlen(cbuf);
1262                 if ((cbuf + len + 1) >= (buf + sizeof(buf))) {
1263                         radlog(L_ERR, "%s[%d]: Line too long",
1264                                filename, *lineno);
1265                         return -1;
1266                 }
1267
1268                 /*
1269                  *      Not doing continuations: check for edge
1270                  *      conditions.
1271                  */
1272                 if (cbuf == buf) {
1273                         if (at_eof) break;
1274
1275                         ptr = buf;
1276                         while (*ptr && isspace((int) *ptr)) ptr++;
1277
1278                         if (!*ptr || (*ptr == '#')) continue;
1279
1280                 } else if (at_eof || (len == 0)) {
1281                         radlog(L_ERR, "%s[%d]: Continuation at EOF is illegal",
1282                                filename, *lineno);
1283                         return -1;
1284                 }
1285
1286                 /*
1287                  *      See if there's a continuation.
1288                  */
1289                 while ((len > 0) &&
1290                        ((cbuf[len - 1] == '\n') || (cbuf[len - 1] == '\r'))) {
1291                         len--;
1292                         cbuf[len] = '\0';
1293                 }
1294
1295                 if ((len > 0) && (cbuf[len - 1] == '\\')) {
1296                         cbuf[len - 1] = '\0';
1297                         cbuf += len - 1;
1298                         continue;
1299                 }
1300
1301                 ptr = cbuf = buf;
1302
1303                 /*
1304                  *      The parser is getting to be evil.
1305                  */
1306                 while ((*ptr == ' ') || (*ptr == '\t')) ptr++;
1307
1308                 if (((ptr[0] == '%') && (ptr[1] == '{')) ||
1309                     (ptr[0] == '`')) {
1310                         int hack;
1311
1312                         if (ptr[0] == '%') {
1313                                 hack = rad_copy_variable(buf1, ptr);
1314                         } else {
1315                                 hack = rad_copy_string(buf1, ptr);
1316                         }
1317                         if (hack < 0) {
1318                                 radlog(L_ERR, "%s[%d]: Invalid expansion: %s",
1319                                        filename, *lineno, ptr);
1320                                 return -1;
1321                         }
1322
1323                         t1 = T_BARE_WORD;
1324                         ptr += hack;
1325
1326                         t2 = gettoken(&ptr, buf2, sizeof(buf2));
1327                         switch (t2) {
1328                         case T_EOL:
1329                         case T_HASH:
1330                                 goto do_bare_word;
1331
1332                         default:
1333                                 radlog(L_ERR, "%s[%d]: Invalid expansion: %s",
1334                                        filename, *lineno, ptr);
1335                                 return -1;
1336                         }
1337                 } else {
1338                         t1 = gettoken(&ptr, buf1, sizeof(buf1));
1339                 }
1340
1341                 /*
1342                  *      The caller eats "name1 name2 {", and calls us
1343                  *      for the data inside of the section.  So if we
1344                  *      receive a closing brace, then it must mean the
1345                  *      end of the section.
1346                  */
1347                if (t1 == T_RCBRACE) {
1348                        if (this == current) {
1349                                radlog(L_ERR, "%s[%d]: Too many closing braces",
1350                                       filename, *lineno);
1351                                return -1;
1352
1353                        }
1354                        this = this->item.parent;
1355                        continue;
1356                 }
1357
1358                 /*
1359                  *      Allow for $INCLUDE files
1360                  *
1361                  *      This *SHOULD* work for any level include.
1362                  *      I really really really hate this file.  -cparker
1363                  */
1364                if ((strcasecmp(buf1, "$INCLUDE") == 0) ||
1365                    (strcasecmp(buf1, "$-INCLUDE") == 0)) {
1366                        int relative = 1;
1367
1368                         t2 = getword(&ptr, buf2, sizeof(buf2));
1369
1370                         if (buf2[0] == '$') relative = 0;
1371
1372                         value = cf_expand_variables(filename, lineno, this, buf, buf2);
1373                         if (!value) return -1;
1374
1375                         if (!FR_DIR_IS_RELATIVE(value)) relative = 0;
1376
1377                         if (relative) {
1378                                 value = cf_local_file(current, value, buf3,
1379                                                       sizeof(buf3));
1380                                 if (!value) {
1381                                         radlog(L_ERR, "%s[%d]: Directories too deep.",
1382                                                filename, *lineno);
1383                                         return -1;
1384                                 }
1385                         }
1386
1387
1388 #ifdef HAVE_DIRENT_H
1389                         /*
1390                          *      $INCLUDE foo/
1391                          *
1392                          *      Include ALL non-"dot" files in the directory.
1393                          *      careful!
1394                          */
1395                         if (value[strlen(value) - 1] == '/') {
1396                                 DIR             *dir;
1397                                 struct dirent   *dp;
1398                                 struct stat stat_buf;
1399
1400                                 DEBUG2("including files in directory %s", value );
1401                                 dir = opendir(value);
1402                                 if (!dir) {
1403                                         radlog(L_ERR, "%s[%d]: Error reading directory %s: %s",
1404                                                filename, *lineno, value,
1405                                                strerror(errno));
1406                                         return -1;
1407                                 }
1408
1409                                 /*
1410                                  *      Read the directory, ignoring "." files.
1411                                  */
1412                                 while ((dp = readdir(dir)) != NULL) {
1413                                         const char *p;
1414
1415                                         if (dp->d_name[0] == '.') continue;
1416
1417                                         /*
1418                                          *      Check for valid characters
1419                                          */
1420                                         for (p = dp->d_name; *p != '\0'; p++) {
1421                                                 if (isalpha((int)*p) ||
1422                                                     isdigit((int)*p) ||
1423                                                     (*p == '-') ||
1424                                                     (*p == '_') ||
1425                                                     (*p == '.')) continue;
1426                                                 break;
1427                                         }
1428                                         if (*p != '\0') continue;
1429
1430                                         snprintf(buf2, sizeof(buf2), "%s%s",
1431                                                  value, dp->d_name);
1432                                         if ((stat(buf2, &stat_buf) != 0) ||
1433                                             S_ISDIR(stat_buf.st_mode)) continue;
1434                                         /*
1435                                          *      Read the file into the current
1436                                          *      configuration sectoin.
1437                                          */
1438                                         if (cf_file_include(buf2, this) < 0) {
1439                                                 closedir(dir);
1440                                                 return -1;
1441                                         }
1442                                 }
1443                                 closedir(dir);
1444                         }  else
1445 #endif
1446                         { /* it was a normal file */
1447                                 if (buf1[1] == '-') {
1448                                         struct stat statbuf;
1449
1450                                         if (stat(value, &statbuf) < 0) {
1451                                                 DEBUG("WARNING: Not including file %s: %s", value, strerror(errno));
1452                                                 continue;
1453                                         }
1454                                 }
1455
1456                                 if (cf_file_include(value, this) < 0) {
1457                                         return -1;
1458                                 }
1459                         }
1460                         continue;
1461                 } /* we were in an include */
1462
1463                if (strcasecmp(buf1, "$template") == 0) {
1464                        CONF_ITEM *ci;
1465                        CONF_SECTION *parentcs;
1466                        t2 = getword(&ptr, buf2, sizeof(buf2));
1467
1468                        parentcs = cf_top_section(current);
1469
1470                        ci = cf_reference_item(parentcs, this, buf2);
1471                        if (!ci || (ci->type != CONF_ITEM_SECTION)) {
1472                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" not found",
1473                                        filename, *lineno, buf2);
1474                                 return -1;
1475                        }
1476
1477                        if (this->template) {
1478                                 radlog(L_ERR, "%s[%d]: Section already has a template",
1479                                        filename, *lineno);
1480                                 return -1;
1481                        }
1482
1483                        this->template = cf_itemtosection(ci);
1484                        continue;
1485                }
1486
1487                 /*
1488                  *      Ensure that the user can't add CONF_PAIRs
1489                  *      with 'internal' names;
1490                  */
1491                 if (buf1[0] == '_') {
1492                         radlog(L_ERR, "%s[%d]: Illegal configuration pair name \"%s\"",
1493                                         filename, *lineno, buf1);
1494                         return -1;
1495                 }
1496
1497                 /*
1498                  *      Grab the next token.
1499                  */
1500                 t2 = gettoken(&ptr, buf2, sizeof(buf2));
1501                 switch (t2) {
1502                 case T_EOL:
1503                 case T_HASH:
1504                 do_bare_word:
1505                         t2 = T_OP_EQ;
1506                         value = NULL;
1507                         goto do_set;
1508
1509                 case T_OP_ADD:
1510                 case T_OP_CMP_EQ:
1511                 case T_OP_SUB:
1512                 case T_OP_LE:
1513                 case T_OP_GE:
1514                         if (!this || (strcmp(this->name1, "update") != 0)) {
1515                                 radlog(L_ERR, "%s[%d]: Invalid operator in assignment",
1516                                        filename, *lineno);
1517                                 return -1;
1518                         }
1519
1520                 case T_OP_EQ:
1521                 case T_OP_SET:
1522                 do_set:
1523                         t3 = getstring(&ptr, buf3, sizeof(buf3));
1524                         if (t3 == T_OP_INVALID) {
1525                                 radlog(L_ERR, "%s[%d]: Parse error: %s",
1526                                        filename, *lineno,
1527                                        fr_strerror());
1528                                 return -1;
1529                         }
1530
1531                         /*
1532                          *      Handle variable substitution via ${foo}
1533                          */
1534                         if ((t3 == T_BARE_WORD) ||
1535                             (t3 == T_DOUBLE_QUOTED_STRING)) {
1536                                 value = cf_expand_variables(filename, lineno, this,
1537                                                             buf, buf3);
1538                                 if (!value) return -1;
1539                         } else if ((t3 == T_EOL) ||
1540                                    (t3 == T_HASH)) {
1541                                 value = NULL;
1542                         } else {
1543                                 value = buf3;
1544                         }
1545
1546                         /*
1547                          *      Add this CONF_PAIR to our CONF_SECTION
1548                          */
1549                         cpn = cf_pair_alloc(buf1, value, t2, t3, this);
1550                         cpn->item.filename = filename;
1551                         cpn->item.lineno = *lineno;
1552                         cf_item_add(this, cf_pairtoitem(cpn));
1553                         continue;
1554
1555                         /*
1556                          *      This horrible code is here to support
1557                          *      if/then/else failover in the
1558                          *      authorize, etc. sections.  It makes no
1559                          *      sense anywhere else.
1560                          */
1561                 case T_LBRACE:
1562                         if ((strcmp(buf1, "if") == 0) ||
1563                             (strcmp(buf1, "elsif") == 0)) {
1564                                 const char *end = ptr;
1565                                 CONF_SECTION *server;
1566
1567                                 if (!condition_looks_ok(&end)) {
1568                                         radlog(L_ERR, "%s[%d]: Parse error in condition at: %s",
1569                                                filename, *lineno, ptr);
1570                                         return -1;
1571                                 }
1572
1573                                 if ((size_t) (end - ptr) >= (sizeof(buf2) - 1)) {
1574                                         radlog(L_ERR, "%s[%d]: Statement too complicated after \"%s\"",
1575                                                filename, *lineno, buf1);
1576                                         return -1;
1577                                 }
1578
1579                                 /*
1580                                  *      More sanity checking.  This is
1581                                  *      getting to be a horrible hack.
1582                                  */
1583                                 server = this;
1584                                 while (server) {
1585                                         if (strcmp(server->name1, "server") == 0) break;
1586                                         server = server->item.parent;
1587                                 }
1588
1589                                 if (0 && !server) {
1590                                         radlog(L_ERR, "%s[%d]: Processing directives such as \"%s\" cannot be used here.",
1591                                                filename, *lineno, buf1);
1592                                         return -1;
1593                                 }
1594
1595                                 buf2[0] = '(';
1596                                 memcpy(buf2 + 1, ptr, end - ptr);
1597                                 buf2[end - ptr + 1] = '\0';
1598                                 ptr = end + 1;
1599                                 t2 = T_BARE_WORD;
1600                                 goto section_alloc;
1601
1602                         } else {
1603                                 radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1604                                        filename, *lineno, buf1);
1605                                 return -1;
1606                         }
1607
1608                         /* FALL-THROUGH */
1609
1610                         /*
1611                          *      No '=', must be a section or sub-section.
1612                          */
1613                 case T_BARE_WORD:
1614                 case T_DOUBLE_QUOTED_STRING:
1615                 case T_SINGLE_QUOTED_STRING:
1616                         t3 = gettoken(&ptr, buf3, sizeof(buf3));
1617                         if (t3 != T_LCBRACE) {
1618                                 radlog(L_ERR, "%s[%d]: Expecting section start brace '{' after \"%s %s\"",
1619                                        filename, *lineno, buf1, buf2);
1620                                 return -1;
1621                         }
1622
1623                 case T_LCBRACE:
1624                 section_alloc:
1625                         css = cf_section_alloc(buf1,
1626                                                t2 == T_LCBRACE ? NULL : buf2,
1627                                                this);
1628                         if (!css) {
1629                                 radlog(L_ERR, "%s[%d]: Failed allocating memory for section",
1630                                                 filename, *lineno);
1631                                 return -1;
1632                         }
1633                         cf_item_add(this, cf_sectiontoitem(css));
1634                         css->item.filename = filename;
1635                         css->item.lineno = *lineno;
1636
1637                         /*
1638                          *      The current section is now the child section.
1639                          */
1640                         this = css;
1641                         continue;
1642
1643                 default:
1644                         radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1645                                filename, *lineno, buf1);
1646                         return -1;
1647                 }
1648         }
1649
1650         /*
1651          *      See if EOF was unexpected ..
1652          */
1653         if (feof(fp) && (this != current)) {
1654                 radlog(L_ERR, "%s[%d]: EOF reached without closing brace for section %s starting at line %d",
1655                        filename, *lineno,
1656                        cf_section_name1(this), cf_section_lineno(this));
1657                 return -1;
1658         }
1659
1660         return 0;
1661 }
1662
1663 /*
1664  *      Include one config file in another.
1665  */
1666 int cf_file_include(const char *filename, CONF_SECTION *cs)
1667 {
1668         FILE            *fp;
1669         int             lineno = 0;
1670         struct stat     statbuf;
1671         time_t          *mtime;
1672         CONF_DATA       *cd;
1673
1674         DEBUG2( "including configuration file %s", filename);
1675
1676         if (stat(filename, &statbuf) == 0) {
1677 #ifdef S_IWOTH
1678                 if ((statbuf.st_mode & S_IWOTH) != 0) {
1679                         radlog(L_ERR|L_CONS, "Configuration file %s is globally writable.  Refusing to start due to insecure configuration.",
1680                                filename);
1681                         return -1;
1682                 }
1683 #endif
1684
1685 #ifdef S_IROTH
1686                 if (0 && (statbuf.st_mode & S_IROTH) != 0) {
1687                         radlog(L_ERR|L_CONS, "Configuration file %s is globally readable.  Refusing to start due to insecure configuration.",
1688                                filename);
1689                         return -1;
1690                 }
1691 #endif
1692         }
1693
1694         fp = fopen(filename, "r");
1695         if (!fp) {
1696                 radlog(L_ERR|L_CONS, "Unable to open file \"%s\": %s",
1697                        filename, strerror(errno));
1698                 return -1;
1699         }
1700
1701         if (cf_data_find_internal(cs, filename, PW_TYPE_FILENAME)) {
1702                 radlog(L_ERR, "Cannot include the same file twice: \"%s\"",
1703                        filename);
1704                 return -1;
1705         }
1706
1707         /*
1708          *      Add the filename to the section
1709          */
1710         mtime = rad_malloc(sizeof(*mtime));
1711         *mtime = statbuf.st_mtime;
1712
1713         if (cf_data_add_internal(cs, filename, mtime, free,
1714                                  PW_TYPE_FILENAME) < 0) {
1715                 fclose(fp);
1716                 radlog(L_ERR|L_CONS, "Internal error opening file \"%s\"",
1717                        filename);
1718                 return -1;
1719         }
1720
1721         cd = cf_data_find_internal(cs, filename, PW_TYPE_FILENAME);
1722         if (!cd) {
1723                 fclose(fp);
1724                 radlog(L_ERR|L_CONS, "Internal error opening file \"%s\"",
1725                        filename);
1726                 return -1;
1727         }
1728
1729         if (!cs->item.filename) cs->item.filename = filename;
1730
1731         /*
1732          *      Read the section.  It's OK to have EOF without a
1733          *      matching close brace.
1734          */
1735         if (cf_section_read(cd->name, &lineno, fp, cs) < 0) {
1736                 fclose(fp);
1737                 return -1;
1738         }
1739
1740         fclose(fp);
1741         return 0;
1742 }
1743
1744 /*
1745  *      Bootstrap a config file.
1746  */
1747 CONF_SECTION *cf_file_read(const char *filename)
1748 {
1749         char *p;
1750         CONF_PAIR *cp;
1751         CONF_SECTION *cs;
1752
1753         cs = cf_section_alloc("main", NULL, NULL);
1754         if (!cs) return NULL;
1755
1756         cp = cf_pair_alloc("confdir", filename, T_OP_SET, T_BARE_WORD, cs);
1757         if (!cp) return NULL;
1758
1759         p = strrchr(cp->value, FR_DIR_SEP);
1760         if (p) *p = '\0';
1761
1762         cp->item.filename = "internal";
1763         cp->item.lineno = 0;
1764         cf_item_add(cs, cf_pairtoitem(cp));
1765
1766         if (cf_file_include(filename, cs) < 0) {
1767                 cf_section_free(&cs);
1768                 return NULL;
1769         }
1770
1771         return cs;
1772 }
1773
1774 /*
1775  * Return a CONF_PAIR within a CONF_SECTION.
1776  */
1777 CONF_PAIR *cf_pair_find(const CONF_SECTION *cs, const char *name)
1778 {
1779         CONF_ITEM       *ci;
1780         CONF_PAIR       *cp = NULL;
1781
1782         if (!cs) return NULL;
1783
1784         /*
1785          *      Find the name in the tree, for speed.
1786          */
1787         if (name) {
1788                 CONF_PAIR mycp;
1789
1790                 mycp.attr = name;
1791                 cp = rbtree_finddata(cs->pair_tree, &mycp);
1792         } else {
1793                 /*
1794                  *      Else find the first one that matches
1795                  */
1796                 for (ci = cs->children; ci; ci = ci->next) {
1797                         if (ci->type == CONF_ITEM_PAIR) {
1798                                 return cf_itemtopair(ci);
1799                         }
1800                 }
1801         }
1802
1803         if (cp || !cs->template) return cp;
1804
1805         return cf_pair_find(cs->template, name);
1806 }
1807
1808 /*
1809  * Return the attr of a CONF_PAIR
1810  */
1811
1812 const char *cf_pair_attr(CONF_PAIR *pair)
1813 {
1814         return (pair ? pair->attr : NULL);
1815 }
1816
1817 /*
1818  * Return the value of a CONF_PAIR
1819  */
1820
1821 const char *cf_pair_value(CONF_PAIR *pair)
1822 {
1823         return (pair ? pair->value : NULL);
1824 }
1825
1826 /*
1827  *      Copied here for error reporting.
1828  */
1829 extern void fr_strerror_printf(const char *, ...);
1830
1831 /*
1832  * Turn a CONF_PAIR into a VALUE_PAIR
1833  * For now, ignore the "value_type" field...
1834  */
1835 VALUE_PAIR *cf_pairtovp(CONF_PAIR *pair)
1836 {
1837         VALUE_PAIR *vp;
1838
1839         if (!pair) {
1840                 fr_strerror_printf("Internal error");
1841                 return NULL;
1842         }
1843
1844         if (!pair->value) {
1845                 fr_strerror_printf("No value given for attribute %s", pair->attr);
1846                 return NULL;
1847         }
1848
1849         /*
1850          *      pairmake handles tags.  pairalloc() doesn't.
1851          */
1852         vp = pairmake(pair->attr, NULL, pair->operator);
1853         if (!vp) {
1854                 return NULL;
1855         }
1856
1857         if (pair->value_type == T_BARE_WORD) {
1858                 if ((vp->type == PW_TYPE_STRING) &&
1859                     (pair->value[0] == '0') && (pair->value[1] == 'x')) {
1860                         vp->type = PW_TYPE_OCTETS;
1861                 }
1862                 if (!pairparsevalue(vp, pair->value)) {
1863                         pairfree(&vp);
1864                         return NULL;
1865                 }
1866                 vp->flags.do_xlat = 0;
1867
1868         } else if (pair->value_type == T_SINGLE_QUOTED_STRING) {
1869                 if (!pairparsevalue(vp, pair->value)) {
1870                         pairfree(&vp);
1871                         return NULL;
1872                 }
1873                 vp->flags.do_xlat = 0;
1874         } else {
1875                 vp->flags.do_xlat = 1;
1876         }
1877
1878         return vp;
1879 }
1880
1881 /*
1882  * Return the first label of a CONF_SECTION
1883  */
1884
1885 const char *cf_section_name1(const CONF_SECTION *cs)
1886 {
1887         return (cs ? cs->name1 : NULL);
1888 }
1889
1890 /*
1891  * Return the second label of a CONF_SECTION
1892  */
1893
1894 const char *cf_section_name2(const CONF_SECTION *cs)
1895 {
1896         return (cs ? cs->name2 : NULL);
1897 }
1898
1899 /*
1900  * Find a value in a CONF_SECTION
1901  */
1902 const char *cf_section_value_find(const CONF_SECTION *cs, const char *attr)
1903 {
1904         CONF_PAIR       *cp;
1905
1906         cp = cf_pair_find(cs, attr);
1907
1908         return (cp ? cp->value : NULL);
1909 }
1910
1911 /*
1912  * Return the next pair after a CONF_PAIR
1913  * with a certain name (char *attr) If the requested
1914  * attr is NULL, any attr matches.
1915  */
1916
1917 CONF_PAIR *cf_pair_find_next(const CONF_SECTION *cs,
1918                              CONF_PAIR *pair, const char *attr)
1919 {
1920         CONF_ITEM       *ci;
1921
1922         /*
1923          * If pair is NULL this must be a first time run
1924          * Find the pair with correct name
1925          */
1926
1927         if (pair == NULL){
1928                 return cf_pair_find(cs, attr);
1929         }
1930
1931         ci = cf_pairtoitem(pair)->next;
1932
1933         for (; ci; ci = ci->next) {
1934                 if (ci->type != CONF_ITEM_PAIR)
1935                         continue;
1936                 if (attr == NULL || strcmp(cf_itemtopair(ci)->attr, attr) == 0)
1937                         break;
1938         }
1939
1940         return cf_itemtopair(ci);
1941 }
1942
1943 /*
1944  * Find a CONF_SECTION, or return the root if name is NULL
1945  */
1946
1947 CONF_SECTION *cf_section_find(const char *name)
1948 {
1949         if (name)
1950                 return cf_section_sub_find(mainconfig.config, name);
1951         else
1952                 return mainconfig.config;
1953 }
1954
1955 /*
1956  * Find a sub-section in a section
1957  */
1958
1959 CONF_SECTION *cf_section_sub_find(const CONF_SECTION *cs, const char *name)
1960 {
1961         CONF_ITEM *ci;
1962
1963         if (!name) return NULL; /* can't find an un-named section */
1964
1965         /*
1966          *      Do the fast lookup if possible.
1967          */
1968         if (cs->section_tree) {
1969                 CONF_SECTION mycs;
1970
1971                 mycs.name1 = name;
1972                 mycs.name2 = NULL;
1973                 return rbtree_finddata(cs->section_tree, &mycs);
1974         }
1975
1976         for (ci = cs->children; ci; ci = ci->next) {
1977                 if (ci->type != CONF_ITEM_SECTION)
1978                         continue;
1979                 if (strcmp(cf_itemtosection(ci)->name1, name) == 0)
1980                         break;
1981         }
1982
1983         return cf_itemtosection(ci);
1984
1985 }
1986
1987
1988 /*
1989  *      Find a CONF_SECTION with both names.
1990  */
1991 CONF_SECTION *cf_section_sub_find_name2(const CONF_SECTION *cs,
1992                                         const char *name1, const char *name2)
1993 {
1994         CONF_ITEM    *ci;
1995
1996         if (!cs) cs = mainconfig.config;
1997
1998         if (name1 && (cs->section_tree)) {
1999                 CONF_SECTION mycs, *master_cs;
2000
2001                 mycs.name1 = name1;
2002                 mycs.name2 = name2;
2003
2004                 master_cs = rbtree_finddata(cs->section_tree, &mycs);
2005                 if (master_cs) {
2006                         return rbtree_finddata(master_cs->name2_tree, &mycs);
2007                 }
2008         }
2009
2010         /*
2011          *      Else do it the old-fashioned way.
2012          */
2013         for (ci = cs->children; ci; ci = ci->next) {
2014                 CONF_SECTION *subcs;
2015
2016                 if (ci->type != CONF_ITEM_SECTION)
2017                         continue;
2018
2019                 subcs = cf_itemtosection(ci);
2020                 if (!name1) {
2021                         if (!subcs->name2) {
2022                                 if (strcmp(subcs->name1, name2) == 0) break;
2023                         } else {
2024                                 if (strcmp(subcs->name2, name2) == 0) break;
2025                         }
2026                         continue; /* don't do the string comparisons below */
2027                 }
2028
2029                 if ((strcmp(subcs->name1, name1) == 0) &&
2030                     (subcs->name2 != NULL) &&
2031                     (strcmp(subcs->name2, name2) == 0))
2032                         break;
2033         }
2034
2035         return cf_itemtosection(ci);
2036 }
2037
2038 /*
2039  * Return the next subsection after a CONF_SECTION
2040  * with a certain name1 (char *name1). If the requested
2041  * name1 is NULL, any name1 matches.
2042  */
2043
2044 CONF_SECTION *cf_subsection_find_next(CONF_SECTION *section,
2045                                       CONF_SECTION *subsection,
2046                                       const char *name1)
2047 {
2048         CONF_ITEM       *ci;
2049
2050         /*
2051          * If subsection is NULL this must be a first time run
2052          * Find the subsection with correct name
2053          */
2054
2055         if (subsection == NULL){
2056                 ci = section->children;
2057         } else {
2058                 ci = cf_sectiontoitem(subsection)->next;
2059         }
2060
2061         for (; ci; ci = ci->next) {
2062                 if (ci->type != CONF_ITEM_SECTION)
2063                         continue;
2064                 if ((name1 == NULL) ||
2065                     (strcmp(cf_itemtosection(ci)->name1, name1) == 0))
2066                         break;
2067         }
2068
2069         return cf_itemtosection(ci);
2070 }
2071
2072
2073 /*
2074  * Return the next section after a CONF_SECTION
2075  * with a certain name1 (char *name1). If the requested
2076  * name1 is NULL, any name1 matches.
2077  */
2078
2079 CONF_SECTION *cf_section_find_next(CONF_SECTION *section,
2080                                    CONF_SECTION *subsection,
2081                                    const char *name1)
2082 {
2083         if (!section->item.parent) return NULL;
2084
2085         return cf_subsection_find_next(section->item.parent, subsection, name1);
2086 }
2087
2088 /*
2089  * Return the next item after a CONF_ITEM.
2090  */
2091
2092 CONF_ITEM *cf_item_find_next(CONF_SECTION *section, CONF_ITEM *item)
2093 {
2094         /*
2095          * If item is NULL this must be a first time run
2096          * Return the first item
2097          */
2098
2099         if (item == NULL) {
2100                 return section->children;
2101         } else {
2102                 return item->next;
2103         }
2104 }
2105
2106 int cf_section_lineno(CONF_SECTION *section)
2107 {
2108         return cf_sectiontoitem(section)->lineno;
2109 }
2110
2111 const char *cf_pair_filename(CONF_PAIR *pair)
2112 {
2113         return cf_pairtoitem(pair)->filename;
2114 }
2115
2116 const char *cf_section_filename(CONF_SECTION *section)
2117 {
2118         return cf_sectiontoitem(section)->filename;
2119 }
2120
2121 int cf_pair_lineno(CONF_PAIR *pair)
2122 {
2123         return cf_pairtoitem(pair)->lineno;
2124 }
2125
2126 int cf_item_is_section(CONF_ITEM *item)
2127 {
2128         return item->type == CONF_ITEM_SECTION;
2129 }
2130 int cf_item_is_pair(CONF_ITEM *item)
2131 {
2132         return item->type == CONF_ITEM_PAIR;
2133 }
2134
2135
2136 static CONF_DATA *cf_data_alloc(CONF_SECTION *parent, const char *name,
2137                                 void *data, void (*data_free)(void *))
2138 {
2139         char *p;
2140         size_t name_len;
2141         CONF_DATA *cd;
2142
2143         name_len = strlen(name) + 1;
2144
2145         p = rad_malloc(sizeof(*cd) + name_len);
2146         cd = (CONF_DATA *) p;
2147         memset(cd, 0, sizeof(*cd));
2148
2149         cd->item.type = CONF_ITEM_DATA;
2150         cd->item.parent = parent;
2151         cd->data = data;
2152         cd->free = data_free;
2153
2154         p += sizeof(*cd);
2155         memcpy(p, name, name_len);
2156         cd->name = p;
2157         return cd;
2158 }
2159
2160
2161 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
2162                                    int flag)
2163 {
2164         if (!cs || !name) return NULL;
2165
2166         /*
2167          *      Find the name in the tree, for speed.
2168          */
2169         if (cs->data_tree) {
2170                 CONF_DATA mycd;
2171
2172                 mycd.name = name;
2173                 mycd.flag = flag;
2174                 return rbtree_finddata(cs->data_tree, &mycd);
2175         }
2176
2177         return NULL;
2178 }
2179
2180 /*
2181  *      Find data from a particular section.
2182  */
2183 void *cf_data_find(CONF_SECTION *cs, const char *name)
2184 {
2185         CONF_DATA *cd = cf_data_find_internal(cs, name, 0);
2186
2187         if (cd) return cd->data;
2188         return NULL;
2189 }
2190
2191
2192 /*
2193  *      Add named data to a configuration section.
2194  */
2195 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
2196                                 void *data, void (*data_free)(void *),
2197                                 int flag)
2198 {
2199         CONF_DATA *cd;
2200
2201         if (!cs || !name) return -1;
2202
2203         /*
2204          *      Already exists.  Can't add it.
2205          */
2206         if (cf_data_find_internal(cs, name, flag) != NULL) return -1;
2207
2208         cd = cf_data_alloc(cs, name, data, data_free);
2209         if (!cd) return -1;
2210         cd->flag = flag;
2211
2212         cf_item_add(cs, cf_datatoitem(cd));
2213
2214         return 0;
2215 }
2216
2217 /*
2218  *      Add named data to a configuration section.
2219  */
2220 int cf_data_add(CONF_SECTION *cs, const char *name,
2221                 void *data, void (*data_free)(void *))
2222 {
2223         return cf_data_add_internal(cs, name, data, data_free, 0);
2224 }
2225
2226 #if 0
2227 /*
2228  *      Copy CONF_DATA from src to dst
2229  */
2230 static void cf_section_copy_data(CONF_SECTION *s, CONF_SECTION *d)
2231 {
2232
2233         CONF_ITEM *cd, *next, **last;
2234
2235         /*
2236          *      Don't check if s->data_tree is NULL.  It's child
2237          *      sections may have data, even if this section doesn't.
2238          */
2239
2240         rad_assert(d->data_tree == NULL);
2241         d->data_tree = s->data_tree;
2242         s->data_tree = NULL;
2243
2244         /*
2245          *      Walk through src, moving CONF_ITEM_DATA
2246          *      to dst, by hand.
2247          */
2248         last = &(s->children);
2249         for (cd = s->children; cd != NULL; cd = next) {
2250                 next = cd->next;
2251
2252                 /*
2253                  *      Recursively copy data from child sections.
2254                  */
2255                 if (cd->type == CONF_ITEM_SECTION) {
2256                         CONF_SECTION *s1, *d1;
2257
2258                         s1 = cf_itemtosection(cd);
2259                         d1 = cf_section_sub_find_name2(d, s1->name1, s1->name2);
2260                         if (d1) {
2261                                 cf_section_copy_data(s1, d1);
2262                         }
2263                         last = &(cd->next);
2264                         continue;
2265                 }
2266
2267                 /*
2268                  *      Not conf data, remember last ptr.
2269                  */
2270                 if (cd->type != CONF_ITEM_DATA) {
2271                         last = &(cd->next);
2272                         continue;
2273                 }
2274
2275                 /*
2276                  *      Remove it from the src list
2277                  */
2278                 *last = cd->next;
2279                 cd->next = NULL;
2280
2281                 /*
2282                  *      Add it to the dst list
2283                  */
2284                 if (!d->children) {
2285                         rad_assert(d->tail == NULL);
2286                         d->children = cd;
2287                 } else {
2288                         rad_assert(d->tail != NULL);
2289                         d->tail->next = cd;
2290                 }
2291                 d->tail = cd;
2292         }
2293 }
2294
2295 /*
2296  *      For a CONF_DATA element, stat the filename, if necessary.
2297  */
2298 static int filename_stat(void *context, void *data)
2299 {
2300         struct stat buf;
2301         CONF_DATA *cd = data;
2302
2303         context = context;      /* -Wunused */
2304
2305         if (cd->flag != PW_TYPE_FILENAME) return 0;
2306
2307         if (stat(cd->name, &buf) < 0) return -1;
2308
2309         if (buf.st_mtime != *(time_t *) cd->data) return -1;
2310
2311         return 0;
2312 }
2313
2314
2315 /*
2316  *      Compare two CONF_SECTIONS.  The items MUST be in the same
2317  *      order.
2318  */
2319 static int cf_section_cmp(CONF_SECTION *a, CONF_SECTION *b)
2320 {
2321         CONF_ITEM *ca = a->children;
2322         CONF_ITEM *cb = b->children;
2323
2324         while (1) {
2325                 CONF_PAIR *pa, *pb;
2326
2327                 /*
2328                  *      Done.  Stop.
2329                  */
2330                 if (!ca && !cb) break;
2331
2332                 /*
2333                  *      Skip CONF_DATA.
2334                  */
2335                 if (ca && ca->type == CONF_ITEM_DATA) {
2336                         ca = ca->next;
2337                         continue;
2338                 }
2339                 if (cb && cb->type == CONF_ITEM_DATA) {
2340                         cb = cb->next;
2341                         continue;
2342                 }
2343
2344                 /*
2345                  *      One is smaller than the other.  Exit.
2346                  */
2347                 if (!ca || !cb) return 0;
2348
2349                 if (ca->type != cb->type) return 0;
2350
2351                 /*
2352                  *      Deal with subsections.
2353                  */
2354                 if (ca->type == CONF_ITEM_SECTION) {
2355                         CONF_SECTION *sa = cf_itemtosection(ca);
2356                         CONF_SECTION *sb = cf_itemtosection(cb);
2357
2358                         if (!cf_section_cmp(sa, sb)) return 0;
2359                         goto next;
2360                 }
2361
2362                 rad_assert(ca->type == CONF_ITEM_PAIR);
2363
2364                 pa = cf_itemtopair(ca);
2365                 pb = cf_itemtopair(cb);
2366
2367                 /*
2368                  *      Different attr and/or value, Exit.
2369                  */
2370                 if ((strcmp(pa->attr, pb->attr) != 0) ||
2371                     (strcmp(pa->value, pb->value) != 0)) return 0;
2372
2373
2374                 /*
2375                  *      And go to the next element.
2376                  */
2377         next:
2378                 ca = ca->next;
2379                 cb = cb->next;
2380         }
2381
2382         /*
2383          *      Walk over the CONF_DATA, stat'ing PW_TYPE_FILENAME.
2384          */
2385         if (a->data_tree &&
2386             (rbtree_walk(a->data_tree, InOrder, filename_stat, NULL) != 0)) {
2387                 return 0;
2388         }
2389
2390         /*
2391          *      They must be the same, say so.
2392          */
2393         return 1;
2394 }
2395
2396
2397 /*
2398  *      Migrate CONF_DATA from one section to another.
2399  */
2400 int cf_section_migrate(CONF_SECTION *dst, CONF_SECTION *src)
2401 {
2402         CONF_ITEM *ci;
2403         CONF_SECTION *s, *d;
2404
2405         for (ci = src->children; ci != NULL; ci = ci->next) {
2406                 if (ci->type != CONF_ITEM_SECTION)
2407                         continue;
2408
2409                 s = cf_itemtosection(ci);
2410                 d = cf_section_sub_find_name2(dst, s->name1, s->name2);
2411
2412                 if (!d) continue; /* not in new one, don't migrate it */
2413
2414                 /*
2415                  *      A section of the same name is in BOTH src & dst,
2416                  *      compare the CONF_PAIR's.  If they're all the same,
2417                  *      then copy the CONF_DATA from one to the other.
2418                  */
2419                 if (cf_section_cmp(s, d)) {
2420                         cf_section_copy_data(s, d);
2421                 }
2422         }
2423
2424         return 1;               /* rcode means anything? */
2425 }
2426 #endif
2427
2428 int cf_section_template(CONF_SECTION *cs, CONF_SECTION *template)
2429 {
2430         if (!cs || !template || cs->template || template->template) return -1;
2431
2432         cs->template = template;
2433
2434         return 0;
2435 }
2436
2437
2438 /*
2439  *      This is here to make the rest of the code easier to read.  It
2440  *      ties conffile.c to log.c, but it means we don't have to
2441  *      pollute every other function with the knowledge of the
2442  *      configuration internals.
2443  */
2444 void cf_log_err(CONF_ITEM *ci, const char *fmt, ...)
2445 {
2446         va_list ap;
2447         char buffer[256];
2448
2449         va_start(ap, fmt);
2450         vsnprintf(buffer, sizeof(buffer), fmt, ap);
2451         va_end(ap);
2452
2453         radlog(L_ERR, "%s[%d]: %s", ci->filename, ci->lineno, buffer);
2454 }
2455
2456
2457 void cf_log_info(CONF_SECTION *cs, const char *fmt, ...)
2458 {
2459         va_list ap;
2460
2461         va_start(ap, fmt);
2462         if (debug_flag > 1 && cf_log_config && cs) vradlog(L_DBG, fmt, ap);
2463         va_end(ap);
2464 }
2465
2466 /*
2467  *      Wrapper to simplify the code.
2468  */
2469 void cf_log_module(CONF_SECTION *cs, const char *fmt, ...)
2470 {
2471         va_list ap;
2472         char buffer[256];
2473
2474         va_start(ap, fmt);
2475         if (debug_flag > 1 && cf_log_modules && cs) {
2476                 vsnprintf(buffer, sizeof(buffer), fmt, ap);
2477
2478                 radlog(L_DBG, " Module: %s", buffer);
2479         }
2480         va_end(ap);
2481 }
2482
2483 const CONF_PARSER *cf_section_parse_table(CONF_SECTION *cs)
2484 {
2485         if (!cs) return NULL;
2486
2487         return cs->variables;
2488 }
2489
2490 #if 0
2491 /*
2492  * JMG dump_config tries to dump the config structure in a readable format
2493  *
2494 */
2495
2496 static int dump_config_section(CONF_SECTION *cs, int indent)
2497 {
2498         CONF_SECTION    *scs;
2499         CONF_PAIR       *cp;
2500         CONF_ITEM       *ci;
2501
2502         /* The DEBUG macro doesn't let me
2503          *   for(i=0;i<indent;++i) debugputchar('\t');
2504          * so I had to get creative. --Pac. */
2505
2506         for (ci = cs->children; ci; ci = ci->next) {
2507                 switch (ci->type) {
2508                 case CONF_ITEM_PAIR:
2509                         cp=cf_itemtopair(ci);
2510                         DEBUG("%.*s%s = %s",
2511                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2512                                 cp->attr, cp->value);
2513                         break;
2514
2515                 case CONF_ITEM_SECTION:
2516                         scs=cf_itemtosection(ci);
2517                         DEBUG("%.*s%s %s%s{",
2518                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2519                                 scs->name1,
2520                                 scs->name2 ? scs->name2 : "",
2521                                 scs->name2 ?  " " : "");
2522                         dump_config_section(scs, indent+1);
2523                         DEBUG("%.*s}",
2524                                 indent, "\t\t\t\t\t\t\t\t\t\t\t");
2525                         break;
2526
2527                 default:        /* FIXME: Do more! */
2528                         break;
2529                 }
2530         }
2531
2532         return 0;
2533 }
2534
2535 int dump_config(CONF_SECTION *cs)
2536 {
2537         return dump_config_section(cs, 0);
2538 }
2539 #endif
2540
2541 static const char *cf_pair_print_value(const CONF_PAIR *cp,
2542                                        char *buffer, size_t buflen)
2543 {
2544         char *p;
2545
2546         if (!cp->value) return "";
2547
2548         switch (cp->value_type) {
2549         default:
2550         case T_BARE_WORD:
2551                 snprintf(buffer, buflen, "%s", cp->value);
2552                 break;
2553
2554         case T_SINGLE_QUOTED_STRING:
2555                 snprintf(buffer, buflen, "'%s'", cp->value);
2556                 break;
2557
2558         case T_DOUBLE_QUOTED_STRING:
2559                 buffer[0] = '"';
2560                 fr_print_string(cp->value, strlen(cp->value),
2561                                 buffer + 1, buflen - 3);
2562                 p = buffer + strlen(buffer); /* yuck... */
2563                 p[0] = '"';
2564                 p[1] = '\0';
2565                 break;
2566         }
2567
2568         return buffer;
2569 }
2570
2571
2572 int cf_pair2xml(FILE *fp, CONF_PAIR *cp)
2573 {
2574         fprintf(fp, "<%s>", cp->attr);
2575         if (cp->value) {
2576                 char buffer[2048];
2577
2578                 char *p = buffer;
2579                 const char *q = cp->value;
2580
2581                 while (*q && (p < (buffer + sizeof(buffer)))) {
2582                         if (q[0] == '&') {
2583                                 memcpy(p, "&amp;", 4);
2584                                 p += 5;
2585
2586                         } else if (q[0] == '<') {
2587                                 memcpy(p, "&lt;", 4);
2588                                 p += 4;
2589
2590                         } else if (q[0] == '>') {
2591                                 memcpy(p, "&gt;", 4);
2592                                 p += 4;
2593
2594                         } else {
2595                                 *(p++) = *q;
2596                         }
2597                         q++;
2598                 }
2599
2600                 *p = '\0';
2601                 fprintf(fp, "%s", buffer);
2602         }
2603
2604         fprintf(fp, "</%s>\n", cp->attr);
2605
2606         return 1;
2607 }
2608
2609 int cf_section2xml(FILE *fp, CONF_SECTION *cs)
2610 {
2611         CONF_ITEM *ci, *next;
2612
2613         /*
2614          *      Section header
2615          */
2616         fprintf(fp, "<%s>\n", cs->name1);
2617         if (cs->name2) {
2618                 fprintf(fp, "<_name2>%s</_name2>\n", cs->name2);
2619         }
2620
2621         /*
2622          *      Loop over contents.
2623          */
2624         for (ci = cs->children; ci; ci = next) {
2625                 next = ci->next;
2626
2627                 switch (ci->type) {
2628                 case CONF_ITEM_PAIR:
2629                         if (!cf_pair2xml(fp, (CONF_PAIR *) ci)) return 0;
2630                         break;
2631
2632                 case CONF_ITEM_SECTION:
2633                         if (!cf_section2xml(fp, (CONF_SECTION *) ci)) return 0;
2634                         break;
2635
2636                 default:        /* should really be an error. */
2637                         break;
2638
2639                 }
2640         }
2641
2642         fprintf(fp, "</%s>\n", cs->name1);
2643
2644         return 1;               /* success */
2645 }
2646
2647 int cf_pair2file(FILE *fp, CONF_PAIR *cp)
2648 {
2649         char buffer[2048];
2650
2651         fprintf(fp, "\t%s = %s\n", cp->attr,
2652                 cf_pair_print_value(cp, buffer, sizeof(buffer)));
2653
2654         return 1;
2655 }
2656
2657 int cf_section2file(FILE *fp, CONF_SECTION *cs)
2658 {
2659         CONF_ITEM *ci, *next;
2660
2661         /*
2662          *      Section header
2663          */
2664         if (!cs->name2) {
2665                 fprintf(fp, "%s {\n", cs->name1);
2666         } else {
2667                 fprintf(fp, "%s %s {\n",
2668                         cs->name1, cs->name2);
2669         }
2670
2671         /*
2672          *      Loop over contents.
2673          */
2674         for (ci = cs->children; ci; ci = next) {
2675                 next = ci->next;
2676
2677                 switch (ci->type) {
2678                 case CONF_ITEM_PAIR:
2679                         if (!cf_pair2file(fp, (CONF_PAIR *) ci)) return 0;
2680                         break;
2681
2682                 case CONF_ITEM_SECTION:
2683                         if (!cf_section2file(fp, (CONF_SECTION *) ci)) return 0;
2684                         break;
2685
2686                 default:        /* should really be an error. */
2687                         break;
2688
2689                 }
2690         }
2691
2692         fprintf(fp, "}\n");
2693
2694         return 1;               /* success */
2695 }