src/main/conffile.c

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