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                                         DEBUG2("Expected open brace '{' after condition at %s", p);
1172                                         return 0;
1173                                 }
1174
1175                                 *ptr = p + 1; /* include the trailing ')' */
1176                                 return 1;
1177                         }
1178                         num_braces--;
1179                         p++;
1180                         continue;
1181
1182                 case '"':
1183                 case '\'':
1184                 case '/':
1185                 case '`':
1186                         quote = *p;
1187                         /* FALL-THROUGH */
1188
1189                 default:
1190                         p++;
1191                         break;
1192                 }
1193         }
1194
1195         DEBUG3("Unexpected error");
1196         return 0;
1197 }
1198
1199
1200 static const char *cf_local_file(CONF_SECTION *cs, const char *local,
1201                                  char *buffer, size_t bufsize)
1202 {
1203         size_t dirsize;
1204         const char *p;
1205         CONF_SECTION *parentcs = cf_top_section(cs);
1206
1207         p = strrchr(parentcs->item.filename, FR_DIR_SEP);
1208         if (!p) return local;
1209
1210         dirsize = (p - parentcs->item.filename) + 1;
1211
1212         if ((dirsize + strlen(local)) >= bufsize) {
1213                 return NULL;
1214         }
1215
1216         memcpy(buffer, parentcs->item.filename, dirsize);
1217         strlcpy(buffer + dirsize, local, bufsize - dirsize);
1218
1219         return buffer;
1220 }
1221
1222
1223 /*
1224  *      Read a part of the config file.
1225  */
1226 static int cf_section_read(const char *filename, int *lineno, FILE *fp,
1227                            CONF_SECTION *current)
1228
1229 {
1230         CONF_SECTION *this, *css;
1231         CONF_PAIR *cpn;
1232         const char *ptr;
1233         const char *value;
1234         char buf[8192];
1235         char buf1[8192];
1236         char buf2[8192];
1237         char buf3[8192];
1238         int t1, t2, t3;
1239         char *cbuf = buf;
1240         size_t len;
1241
1242         this = current;         /* add items here */
1243
1244         /*
1245          *      Read, checking for line continuations ('\\' at EOL)
1246          */
1247         for (;;) {
1248                 int at_eof;
1249
1250                 /*
1251                  *      Get data, and remember if we are at EOF.
1252                  */
1253                 at_eof = (fgets(cbuf, sizeof(buf) - (cbuf - buf), fp) == NULL);
1254                 (*lineno)++;
1255
1256                 /*
1257                  *      We read the entire 8k worth of data: complain.
1258                  *      Note that we don't care if the last character
1259                  *      is \n: it's still forbidden.  This means that
1260                  *      the maximum allowed length of text is 8k-1, which
1261                  *      should be plenty.
1262                  */
1263                 len = strlen(cbuf);
1264                 if ((cbuf + len + 1) >= (buf + sizeof(buf))) {
1265                         radlog(L_ERR, "%s[%d]: Line too long",
1266                                filename, *lineno);
1267                         return -1;
1268                 }
1269
1270                 /*
1271                  *      Not doing continuations: check for edge
1272                  *      conditions.
1273                  */
1274                 if (cbuf == buf) {
1275                         if (at_eof) break;
1276
1277                         ptr = buf;
1278                         while (*ptr && isspace((int) *ptr)) ptr++;
1279
1280                         if (!*ptr || (*ptr == '#')) continue;
1281
1282                 } else if (at_eof || (len == 0)) {
1283                         radlog(L_ERR, "%s[%d]: Continuation at EOF is illegal",
1284                                filename, *lineno);
1285                         return -1;
1286                 }
1287
1288                 /*
1289                  *      See if there's a continuation.
1290                  */
1291                 while ((len > 0) &&
1292                        ((cbuf[len - 1] == '\n') || (cbuf[len - 1] == '\r'))) {
1293                         len--;
1294                         cbuf[len] = '\0';
1295                 }
1296
1297                 if ((len > 0) && (cbuf[len - 1] == '\\')) {
1298                         cbuf[len - 1] = '\0';
1299                         cbuf += len - 1;
1300                         continue;
1301                 }
1302
1303                 ptr = cbuf = buf;
1304
1305                 /*
1306                  *      The parser is getting to be evil.
1307                  */
1308                 while ((*ptr == ' ') || (*ptr == '\t')) ptr++;
1309
1310                 if (((ptr[0] == '%') && (ptr[1] == '{')) ||
1311                     (ptr[0] == '`')) {
1312                         int hack;
1313
1314                         if (ptr[0] == '%') {
1315                                 hack = rad_copy_variable(buf1, ptr);
1316                         } else {
1317                                 hack = rad_copy_string(buf1, ptr);
1318                         }
1319                         if (hack < 0) {
1320                                 radlog(L_ERR, "%s[%d]: Invalid expansion: %s",
1321                                        filename, *lineno, ptr);
1322                                 return -1;
1323                         }
1324
1325                         t1 = T_BARE_WORD;
1326                         ptr += hack;
1327
1328                         t2 = gettoken(&ptr, buf2, sizeof(buf2));
1329                         switch (t2) {
1330                         case T_EOL:
1331                         case T_HASH:
1332                                 goto do_bare_word;
1333
1334                         default:
1335                                 radlog(L_ERR, "%s[%d]: Invalid expansion: %s",
1336                                        filename, *lineno, ptr);
1337                                 return -1;
1338                         }
1339                 } else {
1340                         t1 = gettoken(&ptr, buf1, sizeof(buf1));
1341                 }
1342
1343                 /*
1344                  *      The caller eats "name1 name2 {", and calls us
1345                  *      for the data inside of the section.  So if we
1346                  *      receive a closing brace, then it must mean the
1347                  *      end of the section.
1348                  */
1349                if (t1 == T_RCBRACE) {
1350                        if (this == current) {
1351                                radlog(L_ERR, "%s[%d]: Too many closing braces",
1352                                       filename, *lineno);
1353                                return -1;
1354
1355                        }
1356                        this = this->item.parent;
1357                        continue;
1358                 }
1359
1360                 /*
1361                  *      Allow for $INCLUDE files
1362                  *
1363                  *      This *SHOULD* work for any level include.
1364                  *      I really really really hate this file.  -cparker
1365                  */
1366                if ((strcasecmp(buf1, "$INCLUDE") == 0) ||
1367                    (strcasecmp(buf1, "$-INCLUDE") == 0)) {
1368                        int relative = 1;
1369
1370                         t2 = getword(&ptr, buf2, sizeof(buf2));
1371
1372                         if (buf2[0] == '$') relative = 0;
1373
1374                         value = cf_expand_variables(filename, lineno, this, buf, buf2);
1375                         if (!value) return -1;
1376
1377                         if (!FR_DIR_IS_RELATIVE(value)) relative = 0;
1378
1379                         if (relative) {
1380                                 value = cf_local_file(current, value, buf3,
1381                                                       sizeof(buf3));
1382                                 if (!value) {
1383                                         radlog(L_ERR, "%s[%d]: Directories too deep.",
1384                                                filename, *lineno);
1385                                         return -1;
1386                                 }
1387                         }
1388
1389
1390 #ifdef HAVE_DIRENT_H
1391                         /*
1392                          *      $INCLUDE foo/
1393                          *
1394                          *      Include ALL non-"dot" files in the directory.
1395                          *      careful!
1396                          */
1397                         if (value[strlen(value) - 1] == '/') {
1398                                 DIR             *dir;
1399                                 struct dirent   *dp;
1400                                 struct stat stat_buf;
1401
1402                                 DEBUG2("including files in directory %s", value );
1403                                 dir = opendir(value);
1404                                 if (!dir) {
1405                                         radlog(L_ERR, "%s[%d]: Error reading directory %s: %s",
1406                                                filename, *lineno, value,
1407                                                strerror(errno));
1408                                         return -1;
1409                                 }
1410
1411                                 /*
1412                                  *      Read the directory, ignoring "." files.
1413                                  */
1414                                 while ((dp = readdir(dir)) != NULL) {
1415                                         const char *p;
1416
1417                                         if (dp->d_name[0] == '.') continue;
1418
1419                                         /*
1420                                          *      Check for valid characters
1421                                          */
1422                                         for (p = dp->d_name; *p != '\0'; p++) {
1423                                                 if (isalpha((int)*p) ||
1424                                                     isdigit((int)*p) ||
1425                                                     (*p == '-') ||
1426                                                     (*p == '_') ||
1427                                                     (*p == '.')) continue;
1428                                                 break;
1429                                         }
1430                                         if (*p != '\0') continue;
1431
1432                                         snprintf(buf2, sizeof(buf2), "%s%s",
1433                                                  value, dp->d_name);
1434                                         if ((stat(buf2, &stat_buf) != 0) ||
1435                                             S_ISDIR(stat_buf.st_mode)) continue;
1436                                         /*
1437                                          *      Read the file into the current
1438                                          *      configuration sectoin.
1439                                          */
1440                                         if (cf_file_include(buf2, this) < 0) {
1441                                                 closedir(dir);
1442                                                 return -1;
1443                                         }
1444                                 }
1445                                 closedir(dir);
1446                         }  else
1447 #endif
1448                         { /* it was a normal file */
1449                                 if (buf1[1] == '-') {
1450                                         struct stat statbuf;
1451
1452                                         if (stat(value, &statbuf) < 0) {
1453                                                 DEBUG("WARNING: Not including file %s: %s", value, strerror(errno));
1454                                                 continue;
1455                                         }
1456                                 }
1457
1458                                 if (cf_file_include(value, this) < 0) {
1459                                         return -1;
1460                                 }
1461                         }
1462                         continue;
1463                 } /* we were in an include */
1464
1465                if (strcasecmp(buf1, "$template") == 0) {
1466                        CONF_ITEM *ci;
1467                        CONF_SECTION *parentcs, *templatecs;
1468                        t2 = getword(&ptr, buf2, sizeof(buf2));
1469
1470                        parentcs = cf_top_section(current);
1471
1472                        templatecs = cf_section_sub_find(parentcs, "templates");
1473                        if (!templatecs) {
1474                                 radlog(L_ERR, "%s[%d]: No \"templates\" section for reference \"%s\"",
1475                                        filename, *lineno, buf2);
1476                                 return -1;
1477                        }
1478
1479                        ci = cf_reference_item(parentcs, templatecs, buf2);
1480                        if (!ci || (ci->type != CONF_ITEM_SECTION)) {
1481                                 radlog(L_ERR, "%s[%d]: Reference \"%s\" not found",
1482                                        filename, *lineno, buf2);
1483                                 return -1;
1484                        }
1485
1486                        if (this->template) {
1487                                 radlog(L_ERR, "%s[%d]: Section already has a template",
1488                                        filename, *lineno);
1489                                 return -1;
1490                        }
1491
1492                        this->template = cf_itemtosection(ci);
1493                        continue;
1494                }
1495
1496                 /*
1497                  *      Ensure that the user can't add CONF_PAIRs
1498                  *      with 'internal' names;
1499                  */
1500                 if (buf1[0] == '_') {
1501                         radlog(L_ERR, "%s[%d]: Illegal configuration pair name \"%s\"",
1502                                         filename, *lineno, buf1);
1503                         return -1;
1504                 }
1505
1506                 /*
1507                  *      Grab the next token.
1508                  */
1509                 t2 = gettoken(&ptr, buf2, sizeof(buf2));
1510                 switch (t2) {
1511                 case T_EOL:
1512                 case T_HASH:
1513                 do_bare_word:
1514                         t2 = T_OP_EQ;
1515                         value = NULL;
1516                         goto do_set;
1517
1518                 case T_OP_ADD:
1519                 case T_OP_CMP_EQ:
1520                 case T_OP_SUB:
1521                 case T_OP_LE:
1522                 case T_OP_GE:
1523                 case T_OP_CMP_FALSE:
1524                         if (!this || (strcmp(this->name1, "update") != 0)) {
1525                                 radlog(L_ERR, "%s[%d]: Invalid operator in assignment",
1526                                        filename, *lineno);
1527                                 return -1;
1528                         }
1529
1530                 case T_OP_EQ:
1531                 case T_OP_SET:
1532                 do_set:
1533                         t3 = getstring(&ptr, buf3, sizeof(buf3));
1534                         if (t3 == T_OP_INVALID) {
1535                                 radlog(L_ERR, "%s[%d]: Parse error: %s",
1536                                        filename, *lineno,
1537                                        fr_strerror());
1538                                 return -1;
1539                         }
1540
1541                         /*
1542                          *      Handle variable substitution via ${foo}
1543                          */
1544                         if ((t3 == T_BARE_WORD) ||
1545                             (t3 == T_DOUBLE_QUOTED_STRING)) {
1546                                 value = cf_expand_variables(filename, lineno, this,
1547                                                             buf, buf3);
1548                                 if (!value) return -1;
1549                         } else if ((t3 == T_EOL) ||
1550                                    (t3 == T_HASH)) {
1551                                 value = NULL;
1552                         } else {
1553                                 value = buf3;
1554                         }
1555
1556                         /*
1557                          *      Add this CONF_PAIR to our CONF_SECTION
1558                          */
1559                         cpn = cf_pair_alloc(buf1, value, t2, t3, this);
1560                         cpn->item.filename = filename;
1561                         cpn->item.lineno = *lineno;
1562                         cf_item_add(this, cf_pairtoitem(cpn));
1563                         continue;
1564
1565                         /*
1566                          *      This horrible code is here to support
1567                          *      if/then/else failover in the
1568                          *      authorize, etc. sections.  It makes no
1569                          *      sense anywhere else.
1570                          */
1571                 case T_LBRACE:
1572                         if ((strcmp(buf1, "if") == 0) ||
1573                             (strcmp(buf1, "elsif") == 0)) {
1574                                 const char *end = ptr;
1575                                 CONF_SECTION *server;
1576
1577                                 if (!condition_looks_ok(&end)) {
1578                                         radlog(L_ERR, "%s[%d]: Parse error in condition at: %s",
1579                                                filename, *lineno, ptr);
1580                                         return -1;
1581                                 }
1582
1583                                 if ((size_t) (end - ptr) >= (sizeof(buf2) - 1)) {
1584                                         radlog(L_ERR, "%s[%d]: Statement too complicated after \"%s\"",
1585                                                filename, *lineno, buf1);
1586                                         return -1;
1587                                 }
1588
1589                                 /*
1590                                  *      More sanity checking.  This is
1591                                  *      getting to be a horrible hack.
1592                                  */
1593                                 server = this;
1594                                 while (server) {
1595                                         if (strcmp(server->name1, "server") == 0) break;
1596                                         server = server->item.parent;
1597                                 }
1598
1599                                 if (0 && !server) {
1600                                         radlog(L_ERR, "%s[%d]: Processing directives such as \"%s\" cannot be used here.",
1601                                                filename, *lineno, buf1);
1602                                         return -1;
1603                                 }
1604
1605                                 buf2[0] = '(';
1606                                 memcpy(buf2 + 1, ptr, end - ptr);
1607                                 buf2[end - ptr + 1] = '\0';
1608                                 ptr = end + 1;
1609                                 t2 = T_BARE_WORD;
1610                                 goto section_alloc;
1611
1612                         } else {
1613                                 radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1614                                        filename, *lineno, buf1);
1615                                 return -1;
1616                         }
1617
1618                         /* FALL-THROUGH */
1619
1620                         /*
1621                          *      No '=', must be a section or sub-section.
1622                          */
1623                 case T_BARE_WORD:
1624                 case T_DOUBLE_QUOTED_STRING:
1625                 case T_SINGLE_QUOTED_STRING:
1626                         t3 = gettoken(&ptr, buf3, sizeof(buf3));
1627                         if (t3 != T_LCBRACE) {
1628                                 radlog(L_ERR, "%s[%d]: Expecting section start brace '{' after \"%s %s\"",
1629                                        filename, *lineno, buf1, buf2);
1630                                 return -1;
1631                         }
1632
1633                 case T_LCBRACE:
1634                 section_alloc:
1635                         css = cf_section_alloc(buf1,
1636                                                t2 == T_LCBRACE ? NULL : buf2,
1637                                                this);
1638                         if (!css) {
1639                                 radlog(L_ERR, "%s[%d]: Failed allocating memory for section",
1640                                                 filename, *lineno);
1641                                 return -1;
1642                         }
1643                         cf_item_add(this, cf_sectiontoitem(css));
1644                         css->item.filename = filename;
1645                         css->item.lineno = *lineno;
1646
1647                         /*
1648                          *      The current section is now the child section.
1649                          */
1650                         this = css;
1651                         continue;
1652
1653                 default:
1654                         radlog(L_ERR, "%s[%d]: Parse error after \"%s\"",
1655                                filename, *lineno, buf1);
1656                         return -1;
1657                 }
1658         }
1659
1660         /*
1661          *      See if EOF was unexpected ..
1662          */
1663         if (feof(fp) && (this != current)) {
1664                 radlog(L_ERR, "%s[%d]: EOF reached without closing brace for section %s starting at line %d",
1665                        filename, *lineno,
1666                        cf_section_name1(this), cf_section_lineno(this));
1667                 return -1;
1668         }
1669
1670         return 0;
1671 }
1672
1673 /*
1674  *      Include one config file in another.
1675  */
1676 int cf_file_include(const char *filename, CONF_SECTION *cs)
1677 {
1678         FILE            *fp;
1679         int             lineno = 0;
1680         struct stat     statbuf;
1681         time_t          *mtime;
1682         CONF_DATA       *cd;
1683
1684         DEBUG2( "including configuration file %s", filename);
1685
1686         if (stat(filename, &statbuf) == 0) {
1687 #ifdef S_IWOTH
1688                 if ((statbuf.st_mode & S_IWOTH) != 0) {
1689                         radlog(L_ERR|L_CONS, "Configuration file %s is globally writable.  Refusing to start due to insecure configuration.",
1690                                filename);
1691                         return -1;
1692                 }
1693 #endif
1694
1695 #ifdef S_IROTH
1696                 if (0 && (statbuf.st_mode & S_IROTH) != 0) {
1697                         radlog(L_ERR|L_CONS, "Configuration file %s is globally readable.  Refusing to start due to insecure configuration.",
1698                                filename);
1699                         return -1;
1700                 }
1701 #endif
1702         }
1703
1704         fp = fopen(filename, "r");
1705         if (!fp) {
1706                 radlog(L_ERR|L_CONS, "Unable to open file \"%s\": %s",
1707                        filename, strerror(errno));
1708                 return -1;
1709         }
1710
1711         if (cf_data_find_internal(cs, filename, PW_TYPE_FILENAME)) {
1712                 radlog(L_ERR, "Cannot include the same file twice: \"%s\"",
1713                        filename);
1714                 return -1;
1715         }
1716
1717         /*
1718          *      Add the filename to the section
1719          */
1720         mtime = rad_malloc(sizeof(*mtime));
1721         *mtime = statbuf.st_mtime;
1722
1723         if (cf_data_add_internal(cs, filename, mtime, free,
1724                                  PW_TYPE_FILENAME) < 0) {
1725                 fclose(fp);
1726                 radlog(L_ERR|L_CONS, "Internal error opening file \"%s\"",
1727                        filename);
1728                 return -1;
1729         }
1730
1731         cd = cf_data_find_internal(cs, filename, PW_TYPE_FILENAME);
1732         if (!cd) {
1733                 fclose(fp);
1734                 radlog(L_ERR|L_CONS, "Internal error opening file \"%s\"",
1735                        filename);
1736                 return -1;
1737         }
1738
1739         if (!cs->item.filename) cs->item.filename = filename;
1740
1741         /*
1742          *      Read the section.  It's OK to have EOF without a
1743          *      matching close brace.
1744          */
1745         if (cf_section_read(cd->name, &lineno, fp, cs) < 0) {
1746                 fclose(fp);
1747                 return -1;
1748         }
1749
1750         fclose(fp);
1751         return 0;
1752 }
1753
1754 /*
1755  *      Bootstrap a config file.
1756  */
1757 CONF_SECTION *cf_file_read(const char *filename)
1758 {
1759         char *p;
1760         CONF_PAIR *cp;
1761         CONF_SECTION *cs;
1762
1763         cs = cf_section_alloc("main", NULL, NULL);
1764         if (!cs) return NULL;
1765
1766         cp = cf_pair_alloc("confdir", filename, T_OP_SET, T_BARE_WORD, cs);
1767         if (!cp) return NULL;
1768
1769         p = strrchr(cp->value, FR_DIR_SEP);
1770         if (p) *p = '\0';
1771
1772         cp->item.filename = "internal";
1773         cp->item.lineno = 0;
1774         cf_item_add(cs, cf_pairtoitem(cp));
1775
1776         if (cf_file_include(filename, cs) < 0) {
1777                 cf_section_free(&cs);
1778                 return NULL;
1779         }
1780
1781         return cs;
1782 }
1783
1784 /*
1785  * Return a CONF_PAIR within a CONF_SECTION.
1786  */
1787 CONF_PAIR *cf_pair_find(const CONF_SECTION *cs, const char *name)
1788 {
1789         CONF_ITEM       *ci;
1790         CONF_PAIR       *cp = NULL;
1791
1792         if (!cs) return NULL;
1793
1794         /*
1795          *      Find the name in the tree, for speed.
1796          */
1797         if (name) {
1798                 CONF_PAIR mycp;
1799
1800                 mycp.attr = name;
1801                 cp = rbtree_finddata(cs->pair_tree, &mycp);
1802         } else {
1803                 /*
1804                  *      Else find the first one that matches
1805                  */
1806                 for (ci = cs->children; ci; ci = ci->next) {
1807                         if (ci->type == CONF_ITEM_PAIR) {
1808                                 return cf_itemtopair(ci);
1809                         }
1810                 }
1811         }
1812
1813         if (cp || !cs->template) return cp;
1814
1815         return cf_pair_find(cs->template, name);
1816 }
1817
1818 /*
1819  * Return the attr of a CONF_PAIR
1820  */
1821
1822 const char *cf_pair_attr(CONF_PAIR *pair)
1823 {
1824         return (pair ? pair->attr : NULL);
1825 }
1826
1827 /*
1828  * Return the value of a CONF_PAIR
1829  */
1830
1831 const char *cf_pair_value(CONF_PAIR *pair)
1832 {
1833         return (pair ? pair->value : NULL);
1834 }
1835
1836 /*
1837  *      Copied here for error reporting.
1838  */
1839 extern void fr_strerror_printf(const char *, ...);
1840
1841 /*
1842  * Turn a CONF_PAIR into a VALUE_PAIR
1843  * For now, ignore the "value_type" field...
1844  */
1845 VALUE_PAIR *cf_pairtovp(CONF_PAIR *pair)
1846 {
1847         VALUE_PAIR *vp;
1848
1849         if (!pair) {
1850                 fr_strerror_printf("Internal error");
1851                 return NULL;
1852         }
1853
1854         if (!pair->value) {
1855                 fr_strerror_printf("No value given for attribute %s", pair->attr);
1856                 return NULL;
1857         }
1858
1859         /*
1860          *      pairmake handles tags.  pairalloc() doesn't.
1861          */
1862         vp = pairmake(pair->attr, NULL, pair->operator);
1863         if (!vp) {
1864                 return NULL;
1865         }
1866
1867         if (pair->value_type == T_BARE_WORD) {
1868                 if ((vp->type == PW_TYPE_STRING) &&
1869                     (pair->value[0] == '0') && (pair->value[1] == 'x')) {
1870                         vp->type = PW_TYPE_OCTETS;
1871                 }
1872                 if (!pairparsevalue(vp, pair->value)) {
1873                         pairfree(&vp);
1874                         return NULL;
1875                 }
1876                 vp->flags.do_xlat = 0;
1877
1878         } else if (pair->value_type == T_SINGLE_QUOTED_STRING) {
1879                 if (!pairparsevalue(vp, pair->value)) {
1880                         pairfree(&vp);
1881                         return NULL;
1882                 }
1883                 vp->flags.do_xlat = 0;
1884         } else {
1885                 vp->flags.do_xlat = 1;
1886         }
1887
1888         return vp;
1889 }
1890
1891 /*
1892  * Return the first label of a CONF_SECTION
1893  */
1894
1895 const char *cf_section_name1(const CONF_SECTION *cs)
1896 {
1897         return (cs ? cs->name1 : NULL);
1898 }
1899
1900 /*
1901  * Return the second label of a CONF_SECTION
1902  */
1903
1904 const char *cf_section_name2(const CONF_SECTION *cs)
1905 {
1906         return (cs ? cs->name2 : NULL);
1907 }
1908
1909 /*
1910  * Find a value in a CONF_SECTION
1911  */
1912 const char *cf_section_value_find(const CONF_SECTION *cs, const char *attr)
1913 {
1914         CONF_PAIR       *cp;
1915
1916         cp = cf_pair_find(cs, attr);
1917
1918         return (cp ? cp->value : NULL);
1919 }
1920
1921 /*
1922  * Return the next pair after a CONF_PAIR
1923  * with a certain name (char *attr) If the requested
1924  * attr is NULL, any attr matches.
1925  */
1926
1927 CONF_PAIR *cf_pair_find_next(const CONF_SECTION *cs,
1928                              CONF_PAIR *pair, const char *attr)
1929 {
1930         CONF_ITEM       *ci;
1931
1932         /*
1933          * If pair is NULL this must be a first time run
1934          * Find the pair with correct name
1935          */
1936
1937         if (pair == NULL){
1938                 return cf_pair_find(cs, attr);
1939         }
1940
1941         ci = cf_pairtoitem(pair)->next;
1942
1943         for (; ci; ci = ci->next) {
1944                 if (ci->type != CONF_ITEM_PAIR)
1945                         continue;
1946                 if (attr == NULL || strcmp(cf_itemtopair(ci)->attr, attr) == 0)
1947                         break;
1948         }
1949
1950         return cf_itemtopair(ci);
1951 }
1952
1953 /*
1954  * Find a CONF_SECTION, or return the root if name is NULL
1955  */
1956
1957 CONF_SECTION *cf_section_find(const char *name)
1958 {
1959         if (name)
1960                 return cf_section_sub_find(mainconfig.config, name);
1961         else
1962                 return mainconfig.config;
1963 }
1964
1965 /*
1966  * Find a sub-section in a section
1967  */
1968
1969 CONF_SECTION *cf_section_sub_find(const CONF_SECTION *cs, const char *name)
1970 {
1971         CONF_ITEM *ci;
1972
1973         if (!name) return NULL; /* can't find an un-named section */
1974
1975         /*
1976          *      Do the fast lookup if possible.
1977          */
1978         if (cs->section_tree) {
1979                 CONF_SECTION mycs;
1980
1981                 mycs.name1 = name;
1982                 mycs.name2 = NULL;
1983                 return rbtree_finddata(cs->section_tree, &mycs);
1984         }
1985
1986         for (ci = cs->children; ci; ci = ci->next) {
1987                 if (ci->type != CONF_ITEM_SECTION)
1988                         continue;
1989                 if (strcmp(cf_itemtosection(ci)->name1, name) == 0)
1990                         break;
1991         }
1992
1993         return cf_itemtosection(ci);
1994
1995 }
1996
1997
1998 /*
1999  *      Find a CONF_SECTION with both names.
2000  */
2001 CONF_SECTION *cf_section_sub_find_name2(const CONF_SECTION *cs,
2002                                         const char *name1, const char *name2)
2003 {
2004         CONF_ITEM    *ci;
2005
2006         if (!cs) cs = mainconfig.config;
2007
2008         if (name1 && (cs->section_tree)) {
2009                 CONF_SECTION mycs, *master_cs;
2010
2011                 mycs.name1 = name1;
2012                 mycs.name2 = name2;
2013
2014                 master_cs = rbtree_finddata(cs->section_tree, &mycs);
2015                 if (master_cs) {
2016                         return rbtree_finddata(master_cs->name2_tree, &mycs);
2017                 }
2018         }
2019
2020         /*
2021          *      Else do it the old-fashioned way.
2022          */
2023         for (ci = cs->children; ci; ci = ci->next) {
2024                 CONF_SECTION *subcs;
2025
2026                 if (ci->type != CONF_ITEM_SECTION)
2027                         continue;
2028
2029                 subcs = cf_itemtosection(ci);
2030                 if (!name1) {
2031                         if (!subcs->name2) {
2032                                 if (strcmp(subcs->name1, name2) == 0) break;
2033                         } else {
2034                                 if (strcmp(subcs->name2, name2) == 0) break;
2035                         }
2036                         continue; /* don't do the string comparisons below */
2037                 }
2038
2039                 if ((strcmp(subcs->name1, name1) == 0) &&
2040                     (subcs->name2 != NULL) &&
2041                     (strcmp(subcs->name2, name2) == 0))
2042                         break;
2043         }
2044
2045         return cf_itemtosection(ci);
2046 }
2047
2048 /*
2049  * Return the next subsection after a CONF_SECTION
2050  * with a certain name1 (char *name1). If the requested
2051  * name1 is NULL, any name1 matches.
2052  */
2053
2054 CONF_SECTION *cf_subsection_find_next(CONF_SECTION *section,
2055                                       CONF_SECTION *subsection,
2056                                       const char *name1)
2057 {
2058         CONF_ITEM       *ci;
2059
2060         /*
2061          * If subsection is NULL this must be a first time run
2062          * Find the subsection with correct name
2063          */
2064
2065         if (subsection == NULL){
2066                 ci = section->children;
2067         } else {
2068                 ci = cf_sectiontoitem(subsection)->next;
2069         }
2070
2071         for (; ci; ci = ci->next) {
2072                 if (ci->type != CONF_ITEM_SECTION)
2073                         continue;
2074                 if ((name1 == NULL) ||
2075                     (strcmp(cf_itemtosection(ci)->name1, name1) == 0))
2076                         break;
2077         }
2078
2079         return cf_itemtosection(ci);
2080 }
2081
2082
2083 /*
2084  * Return the next section after a CONF_SECTION
2085  * with a certain name1 (char *name1). If the requested
2086  * name1 is NULL, any name1 matches.
2087  */
2088
2089 CONF_SECTION *cf_section_find_next(CONF_SECTION *section,
2090                                    CONF_SECTION *subsection,
2091                                    const char *name1)
2092 {
2093         if (!section->item.parent) return NULL;
2094
2095         return cf_subsection_find_next(section->item.parent, subsection, name1);
2096 }
2097
2098 /*
2099  * Return the next item after a CONF_ITEM.
2100  */
2101
2102 CONF_ITEM *cf_item_find_next(CONF_SECTION *section, CONF_ITEM *item)
2103 {
2104         /*
2105          * If item is NULL this must be a first time run
2106          * Return the first item
2107          */
2108
2109         if (item == NULL) {
2110                 return section->children;
2111         } else {
2112                 return item->next;
2113         }
2114 }
2115
2116 int cf_section_lineno(CONF_SECTION *section)
2117 {
2118         return cf_sectiontoitem(section)->lineno;
2119 }
2120
2121 const char *cf_pair_filename(CONF_PAIR *pair)
2122 {
2123         return cf_pairtoitem(pair)->filename;
2124 }
2125
2126 const char *cf_section_filename(CONF_SECTION *section)
2127 {
2128         return cf_sectiontoitem(section)->filename;
2129 }
2130
2131 int cf_pair_lineno(CONF_PAIR *pair)
2132 {
2133         return cf_pairtoitem(pair)->lineno;
2134 }
2135
2136 int cf_item_is_section(CONF_ITEM *item)
2137 {
2138         return item->type == CONF_ITEM_SECTION;
2139 }
2140 int cf_item_is_pair(CONF_ITEM *item)
2141 {
2142         return item->type == CONF_ITEM_PAIR;
2143 }
2144
2145
2146 static CONF_DATA *cf_data_alloc(CONF_SECTION *parent, const char *name,
2147                                 void *data, void (*data_free)(void *))
2148 {
2149         char *p;
2150         size_t name_len;
2151         CONF_DATA *cd;
2152
2153         name_len = strlen(name) + 1;
2154
2155         p = rad_malloc(sizeof(*cd) + name_len);
2156         cd = (CONF_DATA *) p;
2157         memset(cd, 0, sizeof(*cd));
2158
2159         cd->item.type = CONF_ITEM_DATA;
2160         cd->item.parent = parent;
2161         cd->data = data;
2162         cd->free = data_free;
2163
2164         p += sizeof(*cd);
2165         memcpy(p, name, name_len);
2166         cd->name = p;
2167         return cd;
2168 }
2169
2170
2171 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
2172                                    int flag)
2173 {
2174         if (!cs || !name) return NULL;
2175
2176         /*
2177          *      Find the name in the tree, for speed.
2178          */
2179         if (cs->data_tree) {
2180                 CONF_DATA mycd;
2181
2182                 mycd.name = name;
2183                 mycd.flag = flag;
2184                 return rbtree_finddata(cs->data_tree, &mycd);
2185         }
2186
2187         return NULL;
2188 }
2189
2190 /*
2191  *      Find data from a particular section.
2192  */
2193 void *cf_data_find(CONF_SECTION *cs, const char *name)
2194 {
2195         CONF_DATA *cd = cf_data_find_internal(cs, name, 0);
2196
2197         if (cd) return cd->data;
2198         return NULL;
2199 }
2200
2201
2202 /*
2203  *      Add named data to a configuration section.
2204  */
2205 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
2206                                 void *data, void (*data_free)(void *),
2207                                 int flag)
2208 {
2209         CONF_DATA *cd;
2210
2211         if (!cs || !name) return -1;
2212
2213         /*
2214          *      Already exists.  Can't add it.
2215          */
2216         if (cf_data_find_internal(cs, name, flag) != NULL) return -1;
2217
2218         cd = cf_data_alloc(cs, name, data, data_free);
2219         if (!cd) return -1;
2220         cd->flag = flag;
2221
2222         cf_item_add(cs, cf_datatoitem(cd));
2223
2224         return 0;
2225 }
2226
2227 /*
2228  *      Add named data to a configuration section.
2229  */
2230 int cf_data_add(CONF_SECTION *cs, const char *name,
2231                 void *data, void (*data_free)(void *))
2232 {
2233         return cf_data_add_internal(cs, name, data, data_free, 0);
2234 }
2235
2236 #if 0
2237 /*
2238  *      Copy CONF_DATA from src to dst
2239  */
2240 static void cf_section_copy_data(CONF_SECTION *s, CONF_SECTION *d)
2241 {
2242
2243         CONF_ITEM *cd, *next, **last;
2244
2245         /*
2246          *      Don't check if s->data_tree is NULL.  It's child
2247          *      sections may have data, even if this section doesn't.
2248          */
2249
2250         rad_assert(d->data_tree == NULL);
2251         d->data_tree = s->data_tree;
2252         s->data_tree = NULL;
2253
2254         /*
2255          *      Walk through src, moving CONF_ITEM_DATA
2256          *      to dst, by hand.
2257          */
2258         last = &(s->children);
2259         for (cd = s->children; cd != NULL; cd = next) {
2260                 next = cd->next;
2261
2262                 /*
2263                  *      Recursively copy data from child sections.
2264                  */
2265                 if (cd->type == CONF_ITEM_SECTION) {
2266                         CONF_SECTION *s1, *d1;
2267
2268                         s1 = cf_itemtosection(cd);
2269                         d1 = cf_section_sub_find_name2(d, s1->name1, s1->name2);
2270                         if (d1) {
2271                                 cf_section_copy_data(s1, d1);
2272                         }
2273                         last = &(cd->next);
2274                         continue;
2275                 }
2276
2277                 /*
2278                  *      Not conf data, remember last ptr.
2279                  */
2280                 if (cd->type != CONF_ITEM_DATA) {
2281                         last = &(cd->next);
2282                         continue;
2283                 }
2284
2285                 /*
2286                  *      Remove it from the src list
2287                  */
2288                 *last = cd->next;
2289                 cd->next = NULL;
2290
2291                 /*
2292                  *      Add it to the dst list
2293                  */
2294                 if (!d->children) {
2295                         rad_assert(d->tail == NULL);
2296                         d->children = cd;
2297                 } else {
2298                         rad_assert(d->tail != NULL);
2299                         d->tail->next = cd;
2300                 }
2301                 d->tail = cd;
2302         }
2303 }
2304
2305 /*
2306  *      For a CONF_DATA element, stat the filename, if necessary.
2307  */
2308 static int filename_stat(void *context, void *data)
2309 {
2310         struct stat buf;
2311         CONF_DATA *cd = data;
2312
2313         context = context;      /* -Wunused */
2314
2315         if (cd->flag != PW_TYPE_FILENAME) return 0;
2316
2317         if (stat(cd->name, &buf) < 0) return -1;
2318
2319         if (buf.st_mtime != *(time_t *) cd->data) return -1;
2320
2321         return 0;
2322 }
2323
2324
2325 /*
2326  *      Compare two CONF_SECTIONS.  The items MUST be in the same
2327  *      order.
2328  */
2329 static int cf_section_cmp(CONF_SECTION *a, CONF_SECTION *b)
2330 {
2331         CONF_ITEM *ca = a->children;
2332         CONF_ITEM *cb = b->children;
2333
2334         while (1) {
2335                 CONF_PAIR *pa, *pb;
2336
2337                 /*
2338                  *      Done.  Stop.
2339                  */
2340                 if (!ca && !cb) break;
2341
2342                 /*
2343                  *      Skip CONF_DATA.
2344                  */
2345                 if (ca && ca->type == CONF_ITEM_DATA) {
2346                         ca = ca->next;
2347                         continue;
2348                 }
2349                 if (cb && cb->type == CONF_ITEM_DATA) {
2350                         cb = cb->next;
2351                         continue;
2352                 }
2353
2354                 /*
2355                  *      One is smaller than the other.  Exit.
2356                  */
2357                 if (!ca || !cb) return 0;
2358
2359                 if (ca->type != cb->type) return 0;
2360
2361                 /*
2362                  *      Deal with subsections.
2363                  */
2364                 if (ca->type == CONF_ITEM_SECTION) {
2365                         CONF_SECTION *sa = cf_itemtosection(ca);
2366                         CONF_SECTION *sb = cf_itemtosection(cb);
2367
2368                         if (!cf_section_cmp(sa, sb)) return 0;
2369                         goto next;
2370                 }
2371
2372                 rad_assert(ca->type == CONF_ITEM_PAIR);
2373
2374                 pa = cf_itemtopair(ca);
2375                 pb = cf_itemtopair(cb);
2376
2377                 /*
2378                  *      Different attr and/or value, Exit.
2379                  */
2380                 if ((strcmp(pa->attr, pb->attr) != 0) ||
2381                     (strcmp(pa->value, pb->value) != 0)) return 0;
2382
2383
2384                 /*
2385                  *      And go to the next element.
2386                  */
2387         next:
2388                 ca = ca->next;
2389                 cb = cb->next;
2390         }
2391
2392         /*
2393          *      Walk over the CONF_DATA, stat'ing PW_TYPE_FILENAME.
2394          */
2395         if (a->data_tree &&
2396             (rbtree_walk(a->data_tree, InOrder, filename_stat, NULL) != 0)) {
2397                 return 0;
2398         }
2399
2400         /*
2401          *      They must be the same, say so.
2402          */
2403         return 1;
2404 }
2405
2406
2407 /*
2408  *      Migrate CONF_DATA from one section to another.
2409  */
2410 int cf_section_migrate(CONF_SECTION *dst, CONF_SECTION *src)
2411 {
2412         CONF_ITEM *ci;
2413         CONF_SECTION *s, *d;
2414
2415         for (ci = src->children; ci != NULL; ci = ci->next) {
2416                 if (ci->type != CONF_ITEM_SECTION)
2417                         continue;
2418
2419                 s = cf_itemtosection(ci);
2420                 d = cf_section_sub_find_name2(dst, s->name1, s->name2);
2421
2422                 if (!d) continue; /* not in new one, don't migrate it */
2423
2424                 /*
2425                  *      A section of the same name is in BOTH src & dst,
2426                  *      compare the CONF_PAIR's.  If they're all the same,
2427                  *      then copy the CONF_DATA from one to the other.
2428                  */
2429                 if (cf_section_cmp(s, d)) {
2430                         cf_section_copy_data(s, d);
2431                 }
2432         }
2433
2434         return 1;               /* rcode means anything? */
2435 }
2436 #endif
2437
2438 int cf_section_template(CONF_SECTION *cs, CONF_SECTION *template)
2439 {
2440         if (!cs || !template || cs->template || template->template) return -1;
2441
2442         cs->template = template;
2443
2444         return 0;
2445 }
2446
2447
2448 /*
2449  *      This is here to make the rest of the code easier to read.  It
2450  *      ties conffile.c to log.c, but it means we don't have to
2451  *      pollute every other function with the knowledge of the
2452  *      configuration internals.
2453  */
2454 void cf_log_err(CONF_ITEM *ci, const char *fmt, ...)
2455 {
2456         va_list ap;
2457         char buffer[256];
2458
2459         va_start(ap, fmt);
2460         vsnprintf(buffer, sizeof(buffer), fmt, ap);
2461         va_end(ap);
2462
2463         radlog(L_ERR, "%s[%d]: %s", ci->filename, ci->lineno, buffer);
2464 }
2465
2466
2467 void cf_log_info(CONF_SECTION *cs, const char *fmt, ...)
2468 {
2469         va_list ap;
2470
2471         va_start(ap, fmt);
2472         if (debug_flag > 1 && cf_log_config && cs) vradlog(L_DBG, fmt, ap);
2473         va_end(ap);
2474 }
2475
2476 /*
2477  *      Wrapper to simplify the code.
2478  */
2479 void cf_log_module(CONF_SECTION *cs, const char *fmt, ...)
2480 {
2481         va_list ap;
2482         char buffer[256];
2483
2484         va_start(ap, fmt);
2485         if (debug_flag > 1 && cf_log_modules && cs) {
2486                 vsnprintf(buffer, sizeof(buffer), fmt, ap);
2487
2488                 radlog(L_DBG, " Module: %s", buffer);
2489         }
2490         va_end(ap);
2491 }
2492
2493 const CONF_PARSER *cf_section_parse_table(CONF_SECTION *cs)
2494 {
2495         if (!cs) return NULL;
2496
2497         return cs->variables;
2498 }
2499
2500 #if 0
2501 /*
2502  * JMG dump_config tries to dump the config structure in a readable format
2503  *
2504 */
2505
2506 static int dump_config_section(CONF_SECTION *cs, int indent)
2507 {
2508         CONF_SECTION    *scs;
2509         CONF_PAIR       *cp;
2510         CONF_ITEM       *ci;
2511
2512         /* The DEBUG macro doesn't let me
2513          *   for(i=0;i<indent;++i) debugputchar('\t');
2514          * so I had to get creative. --Pac. */
2515
2516         for (ci = cs->children; ci; ci = ci->next) {
2517                 switch (ci->type) {
2518                 case CONF_ITEM_PAIR:
2519                         cp=cf_itemtopair(ci);
2520                         DEBUG("%.*s%s = %s",
2521                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2522                                 cp->attr, cp->value);
2523                         break;
2524
2525                 case CONF_ITEM_SECTION:
2526                         scs=cf_itemtosection(ci);
2527                         DEBUG("%.*s%s %s%s{",
2528                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
2529                                 scs->name1,
2530                                 scs->name2 ? scs->name2 : "",
2531                                 scs->name2 ?  " " : "");
2532                         dump_config_section(scs, indent+1);
2533                         DEBUG("%.*s}",
2534                                 indent, "\t\t\t\t\t\t\t\t\t\t\t");
2535                         break;
2536
2537                 default:        /* FIXME: Do more! */
2538                         break;
2539                 }
2540         }
2541
2542         return 0;
2543 }
2544
2545 int dump_config(CONF_SECTION *cs)
2546 {
2547         return dump_config_section(cs, 0);
2548 }
2549 #endif
2550
2551 static const char *cf_pair_print_value(const CONF_PAIR *cp,
2552                                        char *buffer, size_t buflen)
2553 {
2554         char *p;
2555
2556         if (!cp->value) return "";
2557
2558         switch (cp->value_type) {
2559         default:
2560         case T_BARE_WORD:
2561                 snprintf(buffer, buflen, "%s", cp->value);
2562                 break;
2563
2564         case T_SINGLE_QUOTED_STRING:
2565                 snprintf(buffer, buflen, "'%s'", cp->value);
2566                 break;
2567
2568         case T_DOUBLE_QUOTED_STRING:
2569                 buffer[0] = '"';
2570                 fr_print_string(cp->value, strlen(cp->value),
2571                                 buffer + 1, buflen - 3);
2572                 p = buffer + strlen(buffer); /* yuck... */
2573                 p[0] = '"';
2574                 p[1] = '\0';
2575                 break;
2576         }
2577
2578         return buffer;
2579 }
2580
2581
2582 int cf_pair2xml(FILE *fp, const CONF_PAIR *cp)
2583 {
2584         fprintf(fp, "<%s>", cp->attr);
2585         if (cp->value) {
2586                 char buffer[2048];
2587
2588                 char *p = buffer;
2589                 const char *q = cp->value;
2590
2591                 while (*q && (p < (buffer + sizeof(buffer)))) {
2592                         if (q[0] == '&') {
2593                                 memcpy(p, "&amp;", 4);
2594                                 p += 5;
2595
2596                         } else if (q[0] == '<') {
2597                                 memcpy(p, "&lt;", 4);
2598                                 p += 4;
2599
2600                         } else if (q[0] == '>') {
2601                                 memcpy(p, "&gt;", 4);
2602                                 p += 4;
2603
2604                         } else {
2605                                 *(p++) = *q;
2606                         }
2607                         q++;
2608                 }
2609
2610                 *p = '\0';
2611                 fprintf(fp, "%s", buffer);
2612         }
2613
2614         fprintf(fp, "</%s>\n", cp->attr);
2615
2616         return 1;
2617 }
2618
2619 int cf_section2xml(FILE *fp, const CONF_SECTION *cs)
2620 {
2621         CONF_ITEM *ci, *next;
2622
2623         /*
2624          *      Section header
2625          */
2626         fprintf(fp, "<%s>\n", cs->name1);
2627         if (cs->name2) {
2628                 fprintf(fp, "<_name2>%s</_name2>\n", cs->name2);
2629         }
2630
2631         /*
2632          *      Loop over contents.
2633          */
2634         for (ci = cs->children; ci; ci = next) {
2635                 next = ci->next;
2636
2637                 switch (ci->type) {
2638                 case CONF_ITEM_PAIR:
2639                         if (!cf_pair2xml(fp, (CONF_PAIR *) ci)) return 0;
2640                         break;
2641
2642                 case CONF_ITEM_SECTION:
2643                         if (!cf_section2xml(fp, (CONF_SECTION *) ci)) return 0;
2644                         break;
2645
2646                 default:        /* should really be an error. */
2647                         break;
2648
2649                 }
2650         }
2651
2652         fprintf(fp, "</%s>\n", cs->name1);
2653
2654         return 1;               /* success */
2655 }
2656
2657 int cf_pair2file(FILE *fp, const CONF_PAIR *cp)
2658 {
2659         char buffer[2048];
2660
2661         fprintf(fp, "\t%s = %s\n", cp->attr,
2662                 cf_pair_print_value(cp, buffer, sizeof(buffer)));
2663
2664         return 1;
2665 }
2666
2667 int cf_section2file(FILE *fp, const CONF_SECTION *cs)
2668 {
2669         const CONF_ITEM *ci, *next;
2670
2671         /*
2672          *      Section header
2673          */
2674         if (!cs->name2) {
2675                 fprintf(fp, "%s {\n", cs->name1);
2676         } else {
2677                 fprintf(fp, "%s %s {\n",
2678                         cs->name1, cs->name2);
2679         }
2680
2681         /*
2682          *      Loop over contents.
2683          */
2684         for (ci = cs->children; ci; ci = next) {
2685                 next = ci->next;
2686
2687                 switch (ci->type) {
2688                 case CONF_ITEM_PAIR:
2689                         if (!cf_pair2file(fp, (const CONF_PAIR *) ci)) return 0;
2690                         break;
2691
2692                 case CONF_ITEM_SECTION:
2693                         if (!cf_section2file(fp, (const CONF_SECTION *) ci)) return 0;
2694                         break;
2695
2696                 default:        /* should really be an error. */
2697                         break;
2698
2699                 }
2700         }
2701
2702         fprintf(fp, "}\n");
2703
2704         return 1;               /* success */
2705 }