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/autoconf.h>
  33
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #ifdef HAVE_NETINET_IN_H
  38 #       include <netinet/in.h>
  39 #endif
  40
  41 #ifdef HAVE_DIRENT_H
  42 #include <dirent.h>
  43
  44 #ifdef HAVE_SYS_STAT_H
  45 #include <sys/stat.h>
  46 #endif
  47 #endif
  48
  49 #include <ctype.h>
  50
  51 #include <freeradius-devel/radiusd.h>
  52 #include <freeradius-devel/rad_assert.h>
  53 #include <freeradius-devel/modules.h>
  54
  55 typedef enum conf_type {
  56         CONF_ITEM_INVALID = 0,
  57         CONF_ITEM_PAIR,
  58         CONF_ITEM_SECTION,
  59         CONF_ITEM_DATA
  60 } CONF_ITEM_TYPE;
  61
  62 struct conf_item {
  63         struct conf_item *next;
  64         struct conf_part *parent;
  65         int lineno;
  66         CONF_ITEM_TYPE type;
  67 };
  68 struct conf_pair {
  69         CONF_ITEM item;
  70         char *attr;
  71         char *value;
  72         LRAD_TOKEN operator;
  73 };
  74 struct conf_part {
  75         CONF_ITEM item;
  76         const char *name1;
  77         const char *name2;
  78         struct conf_item *children;
  79         struct conf_item *tail; /* for speed */
  80         rbtree_t        *pair_tree; /* and a partridge.. */
  81         rbtree_t        *section_tree; /* no jokes here */
  82         rbtree_t        *name2_tree; /* for sections of the same name2 */
  83         rbtree_t        *data_tree;
  84         void *base;
  85         const CONF_PARSER *variables;
  86 };
  87
  88
  89 /*
  90  *      Internal data that is associated with a configuration section,
  91  *      so that we don't have to track it separately.
  92  */
  93 struct conf_data {
  94         CONF_ITEM  item;
  95         const char *name;
  96         int        flag;
  97         void       *data;       /* user data */
  98         void       (*free)(void *); /* free user data function */
  99 };
 100
 101
 102 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
 103                                 void *data, void (*data_free)(void *),
 104                                 int flag);
 105 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
 106                                    int flag);
 107
 108 /*
 109  *      Isolate the scary casts in these tiny provably-safe functions
 110  */
 111 CONF_PAIR *cf_itemtopair(CONF_ITEM *ci)
 112 {
 113         if (ci == NULL)
 114                 return NULL;
 115         rad_assert(ci->type == CONF_ITEM_PAIR);
 116         return (CONF_PAIR *)ci;
 117 }
 118 CONF_SECTION *cf_itemtosection(CONF_ITEM *ci)
 119 {
 120         if (ci == NULL)
 121                 return NULL;
 122         rad_assert(ci->type == CONF_ITEM_SECTION);
 123         return (CONF_SECTION *)ci;
 124 }
 125 CONF_ITEM *cf_pairtoitem(CONF_PAIR *cp)
 126 {
 127         if (cp == NULL)
 128                 return NULL;
 129         return (CONF_ITEM *)cp;
 130 }
 131 CONF_ITEM *cf_sectiontoitem(CONF_SECTION *cs)
 132 {
 133         if (cs == NULL)
 134                 return NULL;
 135         return (CONF_ITEM *)cs;
 136 }
 137
 138 static CONF_DATA *cf_itemtodata(CONF_ITEM *ci)
 139 {
 140         if (ci == NULL)
 141                 return NULL;
 142         rad_assert(ci->type == CONF_ITEM_DATA);
 143         return (CONF_DATA *)ci;
 144 }
 145 static CONF_ITEM *cf_datatoitem(CONF_DATA *cd)
 146 {
 147         if (cd == NULL)
 148                 return NULL;
 149         return (CONF_ITEM *)cd;
 150 }
 151
 152 /*
 153  *      Create a new CONF_PAIR
 154  */
 155 static CONF_PAIR *cf_pair_alloc(const char *attr, const char *value,
 156                                 LRAD_TOKEN operator, CONF_SECTION *parent)
 157 {
 158         CONF_PAIR *cp;
 159
 160         cp = rad_malloc(sizeof(*cp));
 161         memset(cp, 0, sizeof(*cp));
 162         cp->item.type = CONF_ITEM_PAIR;
 163         cp->item.parent = parent;
 164         cp->attr = strdup(attr);
 165         cp->value = strdup(value);
 166         cp->operator = operator;
 167
 168         return cp;
 169 }
 170
 171 /*
 172  *      Free a CONF_PAIR
 173  */
 174 void cf_pair_free(CONF_PAIR **cp)
 175 {
 176         if (!cp || !*cp) return;
 177
 178         if ((*cp)->attr)
 179                 free((*cp)->attr);
 180         if ((*cp)->value)
 181                 free((*cp)->value);
 182
 183 #ifndef NDEBUG
 184         memset(*cp, 0, sizeof(*cp));
 185 #endif
 186         free(*cp);
 187
 188         *cp = NULL;
 189 }
 190
 191
 192 static void cf_data_free(CONF_DATA **cd)
 193 {
 194         if (!cd || !*cd) return;
 195
 196         free((*cd)->name);
 197         if (!(*cd)->free) {
 198                 free((*cd)->data);
 199         } else {
 200                 ((*cd)->free)((*cd)->data);
 201         }
 202 #ifndef NDEBUG
 203         memset(*cd, 0, sizeof(*cd));
 204 #endif
 205         free(*cd);
 206         *cd = NULL;
 207 }
 208
 209 /*
 210  *      rbtree callback function
 211  */
 212 static int pair_cmp(const void *a, const void *b)
 213 {
 214         const CONF_PAIR *one = a;
 215         const CONF_PAIR *two = b;
 216
 217         return strcmp(one->attr, two->attr);
 218 }
 219
 220
 221 /*
 222  *      rbtree callback function
 223  */
 224 static int section_cmp(const void *a, const void *b)
 225 {
 226         const CONF_SECTION *one = a;
 227         const CONF_SECTION *two = b;
 228
 229         return strcmp(one->name1, two->name1);
 230 }
 231
 232
 233 /*
 234  *      rbtree callback function
 235  */
 236 static int name2_cmp(const void *a, const void *b)
 237 {
 238         const CONF_SECTION *one = a;
 239         const CONF_SECTION *two = b;
 240
 241         rad_assert(strcmp(one->name1, two->name1) == 0);
 242
 243         if (!one->name2 && !two->name2) return 0;
 244         if (!one->name2) return -1;
 245         if (!two->name2) return +1;
 246
 247         return strcmp(one->name2, two->name2);
 248 }
 249
 250
 251 /*
 252  *      rbtree callback function
 253  */
 254 static int data_cmp(const void *a, const void *b)
 255 {
 256         int rcode;
 257
 258         const CONF_DATA *one = a;
 259         const CONF_DATA *two = b;
 260
 261         rcode = one->flag - two->flag;
 262         if (rcode != 0) return rcode;
 263
 264         return strcmp(one->name, two->name);
 265 }
 266
 267
 268 /*
 269  *      Free strings we've parsed into data structures.
 270  */
 271 static void cf_section_parse_free(void *base, const CONF_PARSER *variables)
 272 {
 273         int i;
 274
 275         /*
 276          *      Don't automatically free the strings if we're being
 277          *      called from a module.
 278          */
 279         if (base || !variables) return;
 280
 281         /*
 282          *      Free up dynamically allocated string pointers.
 283          */
 284         for (i = 0; variables[i].name != NULL; i++) {
 285                 char **p;
 286
 287                 if (variables[i].type != PW_TYPE_STRING_PTR) {
 288                         continue;
 289                 }
 290
 291                 /*
 292                  *      Prefer the data, if it's there.
 293                  *      Else use the base + offset.
 294                  */
 295                 if (!variables[i].data) {
 296                         continue;
 297                 }
 298
 299                 /*
 300                  *      FIXME: Add base
 301                  */
 302                 p = (char **) (variables[i].data);
 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                 DEBUG2(" %s: %s = %s", cs->name1, name, value);
 759                 break;
 760
 761         case PW_TYPE_INTEGER:
 762                 *(int *)data = strtol(value, 0, 0);
 763                 DEBUG2(" %s: %s = %d",
 764                        cs->name1, name,
 765                        *(int *)data);
 766                 break;
 767
 768         case PW_TYPE_STRING_PTR:
 769                 q = (char **) data;
 770                 if (*q != NULL) {
 771                         free(*q);
 772                 }
 773
 774                 /*
 775                  *      Expand variables which haven't already been
 776                  *      expanded automagically when the configuration
 777                  *      file was read.
 778                  */
 779                 if (value == dflt) {
 780                         char buffer[8192];
 781
 782                         int lineno = cs->item.lineno;
 783
 784                         /*
 785                          *      FIXME: sizeof(buffer)?
 786                          */
 787                         value = cf_expand_variables("?",
 788                                                     &lineno,
 789                                                     cs, buffer, value);
 790                         if (!value) return -1;
 791                 }
 792
 793                 DEBUG2(" %s: %s = \"%s\"",
 794                        cs->name1, name,
 795                        value ? value : "(null)");
 796                 *q = value ? strdup(value) : NULL;
 797                 break;
 798
 799                 /*
 800                  *      This is the same as PW_TYPE_STRING_PTR,
 801                  *      except that we also "stat" the file, and
 802                  *      cache the result.
 803                  */
 804         case PW_TYPE_FILENAME:
 805                 q = (char **) data;
 806                 if (*q != NULL) {
 807                         free(*q);
 808                 }
 809
 810                 /*
 811                  *      Expand variables which haven't already been
 812                  *      expanded automagically when the configuration
 813                  *      file was read.
 814                  */
 815                 if (value == dflt) {
 816                         char buffer[8192];
 817
 818                         int lineno = cs->item.lineno;
 819
 820                         /*
 821                          *      FIXME: sizeof(buffer)?
 822                          */
 823                         value = cf_expand_variables("?",
 824                                                     &lineno,
 825                                                     cs, buffer, value);
 826                         if (!value) return -1;
 827                 }
 828
 829                 DEBUG2(" %s: %s = \"%s\"",
 830                        cs->name1, name,
 831                        value ? value : "(null)");
 832                 *q = value ? strdup(value) : NULL;
 833
 834                 /*
 835                  *      And now we "stat" the file.
 836                  */
 837                 if (*q) {
 838                         struct stat buf;
 839
 840                         if (stat(*q, &buf) == 0) {
 841                                 time_t *mtime;
 842
 843                                 mtime = rad_malloc(sizeof(*mtime));
 844                                 *mtime = buf.st_mtime;
 845                                 /* FIXME: error? */
 846                                 cf_data_add_internal(cs, *q, mtime, free,
 847                                                      PW_TYPE_FILENAME);
 848                         }
 849                 }
 850                 break;
 851
 852         case PW_TYPE_IPADDR:
 853                 /*
 854                  *      Allow '*' as any address
 855                  */
 856                 if (strcmp(value, "*") == 0) {
 857                         *(uint32_t *) data = htonl(INADDR_ANY);
 858                         DEBUG2(" %s: %s = *", cs->name1, name);
 859                         break;
 860                 }
 861                 if (ip_hton(value, AF_INET, &ipaddr) < 0) {
 862                         radlog(L_ERR, "Can't find IP address for host %s", value);
 863                         return -1;
 864                 }
 865                 DEBUG2(" %s: %s = %s IP address [%s]",
 866                        cs->name1, name, value,
 867                        ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
 868                 *(uint32_t *) data = ipaddr.ipaddr.ip4addr.s_addr;
 869                 break;
 870
 871         case PW_TYPE_IPV6ADDR:
 872                 if (ip_hton(value, AF_INET6, &ipaddr) < 0) {
 873                         radlog(L_ERR, "Can't find IPv6 address for host %s", value);
 874                         return -1;
 875                 }
 876                 DEBUG2(" %s: %s = %s IPv6 address [%s]",
 877                        cs->name1, name, value,
 878                        ip_ntoh(&ipaddr, ipbuf, sizeof(ipbuf)));
 879                 memcpy(data, &ipaddr.ipaddr.ip6addr,
 880                        sizeof(ipaddr.ipaddr.ip6addr));
 881                 break;
 882
 883         default:
 884                 radlog(L_ERR, "type %d not supported yet", type);
 885                 return -1;
 886                 break;
 887         } /* switch over variable type */
 888
 889         return rcode;
 890 }
 891
 892 /*
 893  *      Parse a configuration section into user-supplied variables.
 894  */
 895 int cf_section_parse(CONF_SECTION *cs, void *base,
 896                      const CONF_PARSER *variables)
 897 {
 898         int i;
 899         void *data;
 900
 901         /*
 902          *      Handle the known configuration parameters.
 903          */
 904         for (i = 0; variables[i].name != NULL; i++) {
 905                 /*
 906                  *      Handle subsections specially
 907                  */
 908                 if (variables[i].type == PW_TYPE_SUBSECTION) {
 909                         const CONF_SECTION *subcs;
 910                         subcs = cf_section_sub_find(cs, variables[i].name);
 911
 912                         /*
 913                          *      If the configuration section is NOT there,
 914                          *      then ignore it.
 915                          *
 916                          *      FIXME! This is probably wrong... we should
 917                          *      probably set the items to their default values.
 918                          */
 919                         if (!subcs) continue;
 920
 921                         if (!variables[i].dflt) {
 922                                 DEBUG2("Internal sanity check 1 failed in cf_section_parse");
 923                                 cf_section_parse_free(base, variables);
 924                                 return -1;
 925                         }
 926
 927                         if (cf_section_parse(subcs, base,
 928                                              (const CONF_PARSER *) variables[i].dflt) < 0) {
 929                                 cf_section_parse_free(base, variables);
 930                                 return -1;
 931                         }
 932                         continue;
 933                 } /* else it's a CONF_PAIR */
 934
 935                 if (variables[i].data) {
 936                         data = variables[i].data; /* prefer this. */
 937                 } else if (base) {
 938                         data = ((char *)base) + variables[i].offset;
 939                 } else {
 940                         DEBUG2("Internal sanity check 2 failed in cf_section_parse");
 941                         cf_section_parse_free(base, variables);
 942                         return -1;
 943                 }
 944
 945                 /*
 946                  *      Parse the pair we found, or a default value.
 947                  */
 948                 if (cf_item_parse(cs, variables[i].name, variables[i].type,
 949                                   data, variables[i].dflt) < 0) {
 950                         cf_section_parse_free(base, variables);
 951                         return -1;
 952                 }
 953         } /* for all variables in the configuration section */
 954
 955         cs->base = base;
 956         cs->variables = variables;
 957
 958         return 0;
 959 }
 960
 961
 962 /*
 963  *      Read a part of the config file.
 964  */
 965 static int cf_section_read(const char *file, int *lineno, FILE *fp,
 966                            CONF_SECTION *current)
 967
 968 {
 969         CONF_SECTION *this, *css;
 970         CONF_PAIR *cpn;
 971         char *ptr;
 972         const char *value;
 973         char buf[8192];
 974         char buf1[8192];
 975         char buf2[8192];
 976         char buf3[8192];
 977         int t1, t2, t3;
 978         char *cbuf = buf;
 979         int len;
 980
 981         this = current;         /* add items here */
 982
 983         /*
 984          *      Read, checking for line continuations ('\\' at EOL)
 985          */
 986         for (;;) {
 987                 int eof;
 988
 989                 /*
 990                  *      Get data, and remember if we are at EOF.
 991                  */
 992                 eof = (fgets(cbuf, sizeof(buf) - (cbuf - buf), fp) == NULL);
 993                 (*lineno)++;
 994
 995                 len = strlen(cbuf);
 996
 997                 /*
 998                  *      We've filled the buffer, and there isn't
 999                  *      a CR in it.  Die!
1000                  */
1001                 if ((len == (sizeof(buf) - 1)) &&
1002                     (cbuf[len - 1] != '\n')) {
1003                         radlog(L_ERR, "%s[%d]: Line too long",
1004                                file, *lineno);
1005                         return -1;
1006                 }
1007
1008                 /*
1009                  *  Check for continuations.
1010                  */
1011                 if (cbuf[len - 1] == '\n') len--;
1012
1013                 /*
1014                  *      Last character is '\\'.  Over-write it,
1015                  *      and read another line.
1016                  */
1017                 if ((len > 0) && (cbuf[len - 1] == '\\')) {
1018                         cbuf[len - 1] = '\0';
1019                         cbuf += len - 1;
1020                         continue;
1021                 }
1022
1023                 /*
1024                  *  We're at EOF, and haven't read anything.  Stop.
1025                  */
1026                 if (eof && (cbuf == buf)) {
1027                         break;
1028                 }
1029
1030                 ptr = cbuf = buf;
1031                 t1 = gettoken(&ptr, buf1, sizeof(buf1));
1032
1033                if ((*buf1 == '#') || (*buf1 == '\0')) {
1034                        continue;
1035                }
1036
1037                 /*
1038                  *      The caller eats "name1 name2 {", and calls us
1039                  *      for the data inside of the section.  So if we
1040                  *      receive a closing brace, then it must mean the
1041                  *      end of the section.
1042                  */
1043                if (t1 == T_RCBRACE) {
1044                        if (this == current) {
1045                                radlog(L_ERR, "%s[%d]: Too many closing braces",
1046                                       file, *lineno);
1047                                return -1;
1048
1049                        }
1050                        this = this->item.parent;
1051                        continue;
1052                 }
1053
1054                 /*
1055                  *      Allow for $INCLUDE files
1056                  *
1057                  *      This *SHOULD* work for any level include.
1058                  *      I really really really hate this file.  -cparker
1059                  */
1060                 if (strcasecmp(buf1, "$INCLUDE") == 0) {
1061                         t2 = getword(&ptr, buf2, sizeof(buf2));
1062
1063                         value = cf_expand_variables(file, lineno, this, buf, buf2);
1064                         if (!value) return -1;
1065
1066 #ifdef HAVE_DIRENT_H
1067                         /*
1068                          *      $INCLUDE foo/
1069                          *
1070                          *      Include ALL non-"dot" files in the directory.
1071                          *      careful!
1072                          */
1073                         if (value[strlen(value) - 1] == '/') {
1074                                 DIR             *dir;
1075                                 struct dirent   *dp;
1076                                 struct stat stat_buf;
1077
1078                                 DEBUG2( "Config:   including files in directory: %s", value );
1079                                 dir = opendir(value);
1080                                 if (!dir) {
1081                                         radlog(L_ERR, "%s[%d]: Error reading directory %s: %s",
1082                                                file, *lineno, value,
1083                                                strerror(errno));
1084                                         return -1;
1085                                 }
1086
1087                                 /*
1088                                  *      Read the directory, ignoring "." files.
1089                                  */
1090                                 while ((dp = readdir(dir)) != NULL) {
1091                                         const char *p;
1092
1093                                         if (dp->d_name[0] == '.') continue;
1094
1095                                         /*
1096                                          *      Check for valid characters
1097                                          */
1098                                         for (p = dp->d_name; *p != '\0'; p++) {
1099                                                 if (isalpha((int)*p) ||
1100                                                     isdigit((int)*p) ||
1101                                                     (*p == '_') ||
1102                                                     (*p == '.')) continue;
1103                                                 break;
1104                                         }
1105                                         if (*p != '\0') continue;
1106
1107                                         snprintf(buf2, sizeof(buf2), "%s%s",
1108                                                  value, dp->d_name);
1109                                         if ((stat(buf2, &stat_buf) != 0) ||
1110                                             S_ISDIR(stat_buf.st_mode)) continue;
1111                                         /*
1112                                          *      Read the file into the current
1113                                          *      configuration sectoin.
1114                                          */
1115                                         if (cf_file_include(buf2, this) < 0) {
1116                                                 closedir(dir);
1117                                                 return -1;
1118                                         }
1119                                 }
1120                                 closedir(dir);
1121                         }  else
1122 #endif
1123                         { /* it was a normal file */
1124                                 if (cf_file_include(value, this) < 0) {
1125                                         return -1;
1126                                 }
1127                         }
1128                         continue;
1129                 } /* we were in an include */
1130
1131                 /*
1132                  *      No '=': must be a section or sub-section.
1133                  */
1134                 if (strchr(ptr, '=') == NULL) {
1135                         t2 = gettoken(&ptr, buf2, sizeof(buf2));
1136                         t3 = gettoken(&ptr, buf3, sizeof(buf3));
1137                 } else {
1138                         t2 = gettoken(&ptr, buf2, sizeof(buf2));
1139                         t3 = getword(&ptr, buf3, sizeof(buf3));
1140                 }
1141
1142                 /*
1143                  * Perhaps a subsection.
1144                  */
1145                 if (t2 == T_LCBRACE || t3 == T_LCBRACE) {
1146                         css = cf_section_alloc(buf1,
1147                                                t2 == T_LCBRACE ? NULL : buf2,
1148                                                this);
1149                         if (!css) {
1150                                 radlog(L_ERR, "%s[%d]: Failed allocating memory for section",
1151                                                 file, *lineno);
1152                         }
1153                         cf_item_add(this, cf_sectiontoitem(css));
1154                         css->item.lineno = *lineno;
1155
1156                         /*
1157                          *      The current section is now the child section.
1158                          */
1159                         this = css;
1160                         continue;
1161                 }
1162
1163                 /*
1164                  *      Ignore semi-colons.
1165                  */
1166                 if (*buf2 == ';')
1167                         *buf2 = '\0';
1168
1169                 /*
1170                  *      Must be a normal attr = value line.
1171                  */
1172                 if (buf1[0] != 0 && buf2[0] == 0 && buf3[0] == 0) {
1173                         t2 = T_OP_EQ;
1174                 } else if (buf1[0] == 0 || buf2[0] == 0 ||
1175                            (t2 < T_EQSTART || t2 > T_EQEND)) {
1176                         radlog(L_ERR, "%s[%d]: Line is not in 'attribute = value' format",
1177                                         file, *lineno);
1178                         return -1;
1179                 }
1180
1181                 /*
1182                  *      Ensure that the user can't add CONF_PAIRs
1183                  *      with 'internal' names;
1184                  */
1185                 if (buf1[0] == '_') {
1186                         radlog(L_ERR, "%s[%d]: Illegal configuration pair name \"%s\"",
1187                                         file, *lineno, buf1);
1188                         return -1;
1189                 }
1190
1191                 /*
1192                  *      Handle variable substitution via ${foo}
1193                  */
1194                 value = cf_expand_variables(file, lineno, this, buf, buf3);
1195                 if (!value) return -1;
1196
1197
1198                 /*
1199                  *      Add this CONF_PAIR to our CONF_SECTION
1200                  */
1201                 cpn = cf_pair_alloc(buf1, value, t2, this);
1202                 cpn->item.lineno = *lineno;
1203                 cf_item_add(this, cf_pairtoitem(cpn));
1204         }
1205
1206         /*
1207          *      See if EOF was unexpected ..
1208          */
1209         if (feof(fp) && (this != current)) {
1210                 radlog(L_ERR, "%s[%d]: EOF reached without closing brace for section %s starting at line %d",
1211                        file, *lineno,
1212                        cf_section_name1(this), cf_section_lineno(this));
1213                 return -1;
1214         }
1215
1216         return 0;
1217 }
1218
1219 /*
1220  *      Include one config file in another.
1221  */
1222 int cf_file_include(const char *file, CONF_SECTION *cs)
1223 {
1224         FILE            *fp;
1225         int             lineno = 0;
1226         struct stat     statbuf;
1227         time_t          *mtime;
1228
1229         DEBUG2( "Config:   including file: %s", file);
1230
1231         if (stat(file, &statbuf) == 0) {
1232                 if ((statbuf.st_mode & S_IWOTH) != 0) {
1233                         radlog(L_ERR|L_CONS, "Configuration file %s is globally writable.  Refusing to start due to insecure configuration.",
1234                                file);
1235                         return -1;
1236                 }
1237
1238                 if (0 && (statbuf.st_mode & S_IROTH) != 0) {
1239                         radlog(L_ERR|L_CONS, "Configuration file %s is globally readable.  Refusing to start due to insecure configuration.",
1240                                file);
1241                         return -1;
1242                 }
1243         }
1244
1245         fp = fopen(file, "r");
1246         if (!fp) {
1247                 radlog(L_ERR|L_CONS, "Unable to open file \"%s\": %s",
1248                        file, strerror(errno));
1249                 return -1;
1250         }
1251
1252         /*
1253          *      Read the section.  It's OK to have EOF without a
1254          *      matching close brace.
1255          */
1256         if (cf_section_read(file, &lineno, fp, cs) < 0) {
1257                 fclose(fp);
1258                 return -1;
1259         }
1260
1261         /*
1262          *      Add the filename to the section
1263          */
1264         mtime = rad_malloc(sizeof(*mtime));
1265         *mtime = statbuf.st_mtime;
1266         /* FIXME: error? */
1267         cf_data_add_internal(cs, file, mtime, free,
1268                              PW_TYPE_FILENAME);
1269
1270         fclose(fp);
1271         return 0;
1272 }
1273
1274 /*
1275  *      Bootstrap a config file.
1276  */
1277 CONF_SECTION *cf_file_read(const char *file)
1278 {
1279         CONF_SECTION *cs;
1280
1281         cs = cf_section_alloc("main", NULL, NULL);
1282         if (!cs) return NULL;
1283
1284         if (cf_file_include(file, cs) < 0) {
1285                 cf_section_free(&cs);
1286                 return NULL;
1287         }
1288
1289         return cs;
1290 }
1291
1292 /*
1293  * Return a CONF_PAIR within a CONF_SECTION.
1294  */
1295 CONF_PAIR *cf_pair_find(const CONF_SECTION *cs, const char *name)
1296 {
1297         CONF_ITEM       *ci;
1298
1299         if (!cs) cs = mainconfig.config;
1300
1301         /*
1302          *      Find the name in the tree, for speed.
1303          */
1304         if (name) {
1305                 CONF_PAIR mycp;
1306
1307                 mycp.attr = name;
1308                 return rbtree_finddata(cs->pair_tree, &mycp);
1309         }
1310
1311         /*
1312          *      Else find the first one
1313          */
1314         for (ci = cs->children; ci; ci = ci->next) {
1315                 if (ci->type == CONF_ITEM_PAIR)
1316                         return cf_itemtopair(ci);
1317         }
1318
1319         return NULL;
1320 }
1321
1322 /*
1323  * Return the attr of a CONF_PAIR
1324  */
1325
1326 char *cf_pair_attr(CONF_PAIR *pair)
1327 {
1328         return (pair ? pair->attr : NULL);
1329 }
1330
1331 /*
1332  * Return the value of a CONF_PAIR
1333  */
1334
1335 char *cf_pair_value(CONF_PAIR *pair)
1336 {
1337         return (pair ? pair->value : NULL);
1338 }
1339
1340 /*
1341  * Return the first label of a CONF_SECTION
1342  */
1343
1344 const char *cf_section_name1(const CONF_SECTION *cs)
1345 {
1346         return (cs ? cs->name1 : NULL);
1347 }
1348
1349 /*
1350  * Return the second label of a CONF_SECTION
1351  */
1352
1353 const char *cf_section_name2(const CONF_SECTION *cs)
1354 {
1355         return (cs ? cs->name2 : NULL);
1356 }
1357
1358 /*
1359  * Find a value in a CONF_SECTION
1360  */
1361 char *cf_section_value_find(const CONF_SECTION *cs, const char *attr)
1362 {
1363         CONF_PAIR       *cp;
1364
1365         cp = cf_pair_find(cs, attr);
1366
1367         return (cp ? cp->value : NULL);
1368 }
1369
1370 /*
1371  * Return the next pair after a CONF_PAIR
1372  * with a certain name (char *attr) If the requested
1373  * attr is NULL, any attr matches.
1374  */
1375
1376 CONF_PAIR *cf_pair_find_next(const CONF_SECTION *cs,
1377                              const CONF_PAIR *pair, const char *attr)
1378 {
1379         CONF_ITEM       *ci;
1380
1381         /*
1382          * If pair is NULL this must be a first time run
1383          * Find the pair with correct name
1384          */
1385
1386         if (pair == NULL){
1387                 return cf_pair_find(cs, attr);
1388         }
1389
1390         ci = cf_pairtoitem(pair)->next;
1391
1392         for (; ci; ci = ci->next) {
1393                 if (ci->type != CONF_ITEM_PAIR)
1394                         continue;
1395                 if (attr == NULL || strcmp(cf_itemtopair(ci)->attr, attr) == 0)
1396                         break;
1397         }
1398
1399         return cf_itemtopair(ci);
1400 }
1401
1402 /*
1403  * Find a CONF_SECTION, or return the root if name is NULL
1404  */
1405
1406 CONF_SECTION *cf_section_find(const char *name)
1407 {
1408         if (name)
1409                 return cf_section_sub_find(mainconfig.config, name);
1410         else
1411                 return mainconfig.config;
1412 }
1413
1414 /*
1415  * Find a sub-section in a section
1416  */
1417
1418 CONF_SECTION *cf_section_sub_find(const CONF_SECTION *cs, const char *name)
1419 {
1420         CONF_ITEM *ci;
1421
1422         /*
1423          *      Do the fast lookup if possible.
1424          */
1425         if (name && cs->section_tree) {
1426                 CONF_SECTION mycs;
1427
1428                 mycs.name1 = name;
1429                 mycs.name2 = NULL;
1430                 return rbtree_finddata(cs->section_tree, &mycs);
1431         }
1432
1433         for (ci = cs->children; ci; ci = ci->next) {
1434                 if (ci->type != CONF_ITEM_SECTION)
1435                         continue;
1436                 if (strcmp(cf_itemtosection(ci)->name1, name) == 0)
1437                         break;
1438         }
1439
1440         return cf_itemtosection(ci);
1441
1442 }
1443
1444
1445 /*
1446  *      Find a CONF_SECTION with both names.
1447  */
1448 CONF_SECTION *cf_section_sub_find_name2(const CONF_SECTION *cs,
1449                                         const char *name1, const char *name2)
1450 {
1451         CONF_ITEM    *ci;
1452
1453         if (!name2) return cf_section_sub_find(cs, name1);
1454
1455         if (!cs) cs = mainconfig.config;
1456
1457         if (name1 && (cs->section_tree)) {
1458                 CONF_SECTION mycs, *master_cs;
1459
1460                 mycs.name1 = name1;
1461                 mycs.name2 = name2;
1462
1463                 master_cs = rbtree_finddata(cs->section_tree, &mycs);
1464                 if (master_cs) {
1465                         return rbtree_finddata(master_cs->name2_tree, &mycs);
1466                 }
1467         }
1468
1469         /*
1470          *      Else do it the old-fashioned way.
1471          */
1472         for (ci = cs->children; ci; ci = ci->next) {
1473                 CONF_SECTION *subcs;
1474
1475                 if (ci->type != CONF_ITEM_SECTION)
1476                         continue;
1477
1478                 subcs = cf_itemtosection(ci);
1479                 if (!name1) {
1480                         if (!subcs->name2) {
1481                                 if (strcmp(subcs->name1, name2) == 0) break;
1482                         } else {
1483                                 if (strcmp(subcs->name2, name2) == 0) break;
1484                         }
1485                         continue; /* don't do the string comparisons below */
1486                 }
1487
1488                 if ((strcmp(subcs->name1, name1) == 0) &&
1489                     (subcs->name2 != NULL) &&
1490                     (strcmp(subcs->name2, name2) == 0))
1491                         break;
1492         }
1493
1494         return cf_itemtosection(ci);
1495 }
1496
1497 /*
1498  * Return the next subsection after a CONF_SECTION
1499  * with a certain name1 (char *name1). If the requested
1500  * name1 is NULL, any name1 matches.
1501  */
1502
1503 CONF_SECTION *cf_subsection_find_next(CONF_SECTION *section,
1504                                       CONF_SECTION *subsection,
1505                                       const char *name1)
1506 {
1507         CONF_ITEM       *ci;
1508
1509         /*
1510          * If subsection is NULL this must be a first time run
1511          * Find the subsection with correct name
1512          */
1513
1514         if (subsection == NULL){
1515                 ci = section->children;
1516         } else {
1517                 ci = cf_sectiontoitem(subsection)->next;
1518         }
1519
1520         for (; ci; ci = ci->next) {
1521                 if (ci->type != CONF_ITEM_SECTION)
1522                         continue;
1523                 if ((name1 == NULL) ||
1524                     (strcmp(cf_itemtosection(ci)->name1, name1) == 0))
1525                         break;
1526         }
1527
1528         return cf_itemtosection(ci);
1529 }
1530
1531 /*
1532  * Return the next item after a CONF_ITEM.
1533  */
1534
1535 CONF_ITEM *cf_item_find_next(CONF_SECTION *section, CONF_ITEM *item)
1536 {
1537         /*
1538          * If item is NULL this must be a first time run
1539          * Return the first item
1540          */
1541
1542         if (item == NULL) {
1543                 return section->children;
1544         } else {
1545                 return item->next;
1546         }
1547 }
1548
1549 int cf_section_lineno(CONF_SECTION *section)
1550 {
1551         return cf_sectiontoitem(section)->lineno;
1552 }
1553
1554 int cf_pair_lineno(CONF_PAIR *pair)
1555 {
1556         return cf_pairtoitem(pair)->lineno;
1557 }
1558
1559 int cf_item_is_section(CONF_ITEM *item)
1560 {
1561         return item->type == CONF_ITEM_SECTION;
1562 }
1563 int cf_item_is_pair(CONF_ITEM *item)
1564 {
1565         return item->type == CONF_ITEM_PAIR;
1566 }
1567
1568
1569 static CONF_DATA *cf_data_alloc(CONF_SECTION *parent, const char *name,
1570                                 void *data, void (*data_free)(void *))
1571 {
1572         CONF_DATA *cd;
1573
1574         cd = rad_malloc(sizeof(*cd));
1575         memset(cd, 0, sizeof(*cd));
1576
1577         cd->item.type = CONF_ITEM_DATA;
1578         cd->item.parent = parent;
1579         cd->name = strdup(name);
1580         cd->data = data;
1581         cd->free = data_free;
1582
1583         return cd;
1584 }
1585
1586
1587 static void *cf_data_find_internal(CONF_SECTION *cs, const char *name,
1588                                    int flag)
1589 {
1590         if (!cs || !name) return NULL;
1591
1592         /*
1593          *      Find the name in the tree, for speed.
1594          */
1595         if (cs->data_tree) {
1596                 CONF_DATA mycd, *cd;
1597
1598                 mycd.name = name;
1599                 mycd.flag = flag;
1600                 cd = rbtree_finddata(cs->data_tree, &mycd);
1601                 if (cd) return cd->data;
1602         }
1603
1604         return NULL;
1605 }
1606
1607 /*
1608  *      Find data from a particular section.
1609  */
1610 void *cf_data_find(CONF_SECTION *cs, const char *name)
1611 {
1612         return cf_data_find_internal(cs, name, 0);
1613 }
1614
1615
1616 /*
1617  *      Add named data to a configuration section.
1618  */
1619 static int cf_data_add_internal(CONF_SECTION *cs, const char *name,
1620                                 void *data, void (*data_free)(void *),
1621                                 int flag)
1622 {
1623         CONF_DATA *cd;
1624
1625         if (!cs || !name) return -1;
1626
1627         /*
1628          *      Already exists.  Can't add it.
1629          */
1630         if (cf_data_find_internal(cs, name, flag) != NULL) return -1;
1631
1632         cd = cf_data_alloc(cs, name, data, data_free);
1633         if (!cd) return -1;
1634         cd->flag = flag;
1635
1636         cf_item_add(cs, cf_datatoitem(cd));
1637
1638         return 0;
1639 }
1640
1641 /*
1642  *      Add named data to a configuration section.
1643  */
1644 int cf_data_add(CONF_SECTION *cs, const char *name,
1645                 void *data, void (*data_free)(void *))
1646 {
1647         return cf_data_add_internal(cs, name, data, data_free, 0);
1648 }
1649
1650
1651 /*
1652  *      Copy CONF_DATA from src to dst
1653  */
1654 static void cf_section_copy_data(CONF_SECTION *s, CONF_SECTION *d)
1655 {
1656
1657         CONF_ITEM *cd, *next, **last;
1658
1659         /*
1660          *      Don't check if s->data_tree is NULL.  It's child
1661          *      sections may have data, even if this section doesn't.
1662          */
1663
1664         rad_assert(d->data_tree == NULL);
1665         d->data_tree = s->data_tree;
1666         s->data_tree = NULL;
1667
1668         /*
1669          *      Walk through src, moving CONF_ITEM_DATA
1670          *      to dst, by hand.
1671          */
1672         last = &(s->children);
1673         for (cd = s->children; cd != NULL; cd = next) {
1674                 next = cd->next;
1675
1676                 /*
1677                  *      Recursively copy data from child sections.
1678                  */
1679                 if (cd->type == CONF_ITEM_SECTION) {
1680                         CONF_SECTION *s1, *d1;
1681
1682                         s1 = cf_itemtosection(cd);
1683                         d1 = cf_section_sub_find_name2(d, s1->name1, s1->name2);
1684                         if (d1) {
1685                                 cf_section_copy_data(s1, d1);
1686                         }
1687                         last = &(cd->next);
1688                         continue;
1689                 }
1690
1691                 /*
1692                  *      Not conf data, remember last ptr.
1693                  */
1694                 if (cd->type != CONF_ITEM_DATA) {
1695                         last = &(cd->next);
1696                         continue;
1697                 }
1698
1699                 /*
1700                  *      Remove it from the src list
1701                  */
1702                 *last = cd->next;
1703                 cd->next = NULL;
1704
1705                 /*
1706                  *      Add it to the dst list
1707                  */
1708                 if (!d->children) {
1709                         rad_assert(d->tail == NULL);
1710                         d->children = cd;
1711                 } else {
1712                         rad_assert(d->tail != NULL);
1713                         d->tail->next = cd;
1714                 }
1715                 d->tail = cd;
1716         }
1717 }
1718
1719 /*
1720  *      For a CONF_DATA element, stat the filename, if necessary.
1721  */
1722 static int filename_stat(void *context, void *data)
1723 {
1724         struct stat buf;
1725         CONF_DATA *cd = data;
1726
1727         context = context;      /* -Wunused */
1728
1729         if (cd->flag != PW_TYPE_FILENAME) return 0;
1730
1731         if (stat(cd->name, &buf) < 0) return -1;
1732
1733         if (buf.st_mtime != *(time_t *) cd->data) return -1;
1734
1735         return 0;
1736 }
1737
1738
1739 /*
1740  *      Compare two CONF_SECTIONS.  The items MUST be in the same
1741  *      order.
1742  */
1743 static int cf_section_cmp(CONF_SECTION *a, CONF_SECTION *b)
1744 {
1745         CONF_ITEM *ca = a->children;
1746         CONF_ITEM *cb = b->children;
1747
1748         while (1) {
1749                 CONF_PAIR *pa, *pb;
1750
1751                 /*
1752                  *      Done.  Stop.
1753                  */
1754                 if (!ca && !cb) break;
1755
1756                 /*
1757                  *      Skip CONF_DATA.
1758                  */
1759                 if (ca && ca->type == CONF_ITEM_DATA) {
1760                         ca = ca->next;
1761                         continue;
1762                 }
1763                 if (cb && cb->type == CONF_ITEM_DATA) {
1764                         cb = cb->next;
1765                         continue;
1766                 }
1767
1768                 /*
1769                  *      One is smaller than the other.  Exit.
1770                  */
1771                 if (!ca || !cb) return 0;
1772
1773                 if (ca->type != cb->type) return 0;
1774
1775                 /*
1776                  *      Deal with subsections.
1777                  */
1778                 if (ca->type == CONF_ITEM_SECTION) {
1779                         CONF_SECTION *sa = cf_itemtosection(ca);
1780                         CONF_SECTION *sb = cf_itemtosection(cb);
1781
1782                         if (!cf_section_cmp(sa, sb)) return 0;
1783                         goto next;
1784                 }
1785
1786                 rad_assert(ca->type == CONF_ITEM_PAIR);
1787
1788                 pa = cf_itemtopair(ca);
1789                 pb = cf_itemtopair(cb);
1790
1791                 /*
1792                  *      Different attr and/or value, Exit.
1793                  */
1794                 if ((strcmp(pa->attr, pb->attr) != 0) ||
1795                     (strcmp(pa->value, pb->value) != 0)) return 0;
1796
1797
1798                 /*
1799                  *      And go to the next element.
1800                  */
1801         next:
1802                 ca = ca->next;
1803                 cb = cb->next;
1804         }
1805
1806         /*
1807          *      Walk over the CONF_DATA, stat'ing PW_TYPE_FILENAME.
1808          */
1809         if (a->data_tree &&
1810             (rbtree_walk(a->data_tree, InOrder, filename_stat, NULL) != 0)) {
1811                 return 0;
1812         }
1813
1814         /*
1815          *      They must be the same, say so.
1816          */
1817         return 1;
1818 }
1819
1820
1821
1822
1823 /*
1824  *      Migrate CONF_DATA from one section to another.
1825  */
1826 int cf_section_migrate(CONF_SECTION *dst, CONF_SECTION *src)
1827 {
1828         CONF_ITEM *ci;
1829         CONF_SECTION *s, *d;
1830
1831         for (ci = src->children; ci != NULL; ci = ci->next) {
1832                 if (ci->type != CONF_ITEM_SECTION)
1833                         continue;
1834
1835                 s = cf_itemtosection(ci);
1836                 d = cf_section_sub_find_name2(dst, s->name1, s->name2);
1837
1838                 if (!d) continue; /* not in new one, don't migrate it */
1839
1840                 /*
1841                  *      A section of the same name is in BOTH src & dst,
1842                  *      compare the CONF_PAIR's.  If they're all the same,
1843                  *      then copy the CONF_DATA from one to the other.
1844                  */
1845                 if (cf_section_cmp(s, d)) {
1846                         cf_section_copy_data(s, d);
1847                 }
1848         }
1849
1850         return 1;               /* rcode means anything? */
1851 }
1852
1853
1854 #if 0
1855 /*
1856  * JMG dump_config tries to dump the config structure in a readable format
1857  *
1858 */
1859
1860 static int dump_config_section(CONF_SECTION *cs, int indent)
1861 {
1862         CONF_SECTION    *scs;
1863         CONF_PAIR       *cp;
1864         CONF_ITEM       *ci;
1865
1866         /* The DEBUG macro doesn't let me
1867          *   for(i=0;i<indent;++i) debugputchar('\t');
1868          * so I had to get creative. --Pac. */
1869
1870         for (ci = cs->children; ci; ci = ci->next) {
1871                 switch (ci->type) {
1872                 case CONF_ITEM_PAIR:
1873                         cp=cf_itemtopair(ci);
1874                         DEBUG("%.*s%s = %s",
1875                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
1876                                 cp->attr, cp->value);
1877                         break;
1878
1879                 case CONF_ITEM_SECTION:
1880                         scs=cf_itemtosection(ci);
1881                         DEBUG("%.*s%s %s%s{",
1882                                 indent, "\t\t\t\t\t\t\t\t\t\t\t",
1883                                 scs->name1,
1884                                 scs->name2 ? scs->name2 : "",
1885                                 scs->name2 ?  " " : "");
1886                         dump_config_section(scs, indent+1);
1887                         DEBUG("%.*s}",
1888                                 indent, "\t\t\t\t\t\t\t\t\t\t\t");
1889                         break;
1890
1891                 default:        /* FIXME: Do more! */
1892                         break;
1893                 }
1894         }
1895
1896         return 0;
1897 }
1898
1899 int dump_config(void)
1900 {
1901         return dump_config_section(mainconfig.config, 0);
1902 }
1903 #endif