1 /* $OpenBSD: conf.c,v 1.55 2003/06/03 14:28:16 ho Exp $ */
2 /* $EOM: conf.c,v 1.48 2000/12/04 02:04:29 angelos Exp $ */
5 * Copyright (c) 1998, 1999, 2000, 2001 Niklas Hallqvist. All rights reserved.
6 * Copyright (c) 2000, 2001, 2002 HÃ¥kan Olsson. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * This code was written under funding by Ericsson Radio Systems.
33 #include <sys/param.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
50 static void conf_load_defaults (int);
52 static int conf_find_trans_xf (int, char *);
55 size_t strlcpy(char *, const char *, size_t);
58 TAILQ_ENTRY (conf_trans) link;
60 enum conf_op { CONF_SET, CONF_REMOVE, CONF_REMOVE_SECTION } op;
68 TAILQ_HEAD (conf_trans_head, conf_trans) conf_trans_queue;
73 const u_int8_t bin2asc[]
74 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
76 const u_int8_t asc2bin[] =
78 255, 255, 255, 255, 255, 255, 255, 255,
79 255, 255, 255, 255, 255, 255, 255, 255,
80 255, 255, 255, 255, 255, 255, 255, 255,
81 255, 255, 255, 255, 255, 255, 255, 255,
82 255, 255, 255, 255, 255, 255, 255, 255,
83 255, 255, 255, 62, 255, 255, 255, 63,
84 52, 53, 54, 55, 56, 57, 58, 59,
85 60, 61, 255, 255, 255, 255, 255, 255,
86 255, 0, 1, 2, 3, 4, 5, 6,
87 7, 8, 9, 10, 11, 12, 13, 14,
88 15, 16, 17, 18, 19, 20, 21, 22,
89 23, 24, 25, 255, 255, 255, 255, 255,
90 255, 26, 27, 28, 29, 30, 31, 32,
91 33, 34, 35, 36, 37, 38, 39, 40,
92 41, 42, 43, 44, 45, 46, 47, 48,
93 49, 50, 51, 255, 255, 255, 255, 255
97 LIST_ENTRY (conf_binding) link;
105 LIST_HEAD (conf_bindings, conf_binding) conf_bindings[256];
107 static char *conf_addr;
109 static __inline__ u_int8_t
116 hash = ((hash << 1) | (hash >> 7)) ^ tolower (*s);
123 * Insert a tag-value combination from LINE (the equal sign is at POS)
126 conf_remove_now (char *section, char *tag)
128 struct conf_binding *cb, *next;
130 for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = next)
132 next = LIST_NEXT (cb, link);
133 if (strcasecmp (cb->section, section) == 0
134 && strcasecmp (cb->tag, tag) == 0)
136 LIST_REMOVE (cb, link);
137 warnx("[%s]:%s->%s removed", section, tag, cb->value);
149 conf_remove_section_now (char *section)
151 struct conf_binding *cb, *next;
154 for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = next)
156 next = LIST_NEXT (cb, link);
157 if (strcasecmp (cb->section, section) == 0)
160 LIST_REMOVE (cb, link);
161 warnx("[%s]:%s->%s removed", section, cb->tag, cb->value);
172 * Insert a tag-value combination from LINE (the equal sign is at POS)
173 * into SECTION of our configuration database.
176 conf_set_now (char *section, char *tag, char *value, int override,
179 struct conf_binding *node = 0;
182 conf_remove_now (section, tag);
183 else if (conf_get_str (section, tag))
186 warnx("conf_set: duplicate tag [%s]:%s, ignoring...\n", section, tag);
190 node = calloc (1, sizeof *node);
193 warnx("conf_set: calloc (1, %lu) failed", (unsigned long)sizeof *node);
196 node->section = strdup (section);
197 node->tag = strdup (tag);
198 node->value = strdup (value);
199 node->is_default = is_default;
201 LIST_INSERT_HEAD (&conf_bindings[conf_hash (section)], node, link);
206 * Parse the line LINE of SZ bytes. Skip Comments, recognize section
207 * headers and feed tag-value pairs into our configuration database.
210 conf_parse_line (int trans, char *line, size_t sz)
215 static char *section = 0;
220 /* Lines starting with '#' or ';' are comments. */
221 if (*line == '#' || *line == ';')
224 /* '[section]' parsing... */
227 for (i = 1; i < sz; i++)
234 warnx("conf_parse_line: %d:"
235 "non-matched ']', ignoring until next section", ln);
239 section = malloc (i);
242 warnx("conf_parse_line: %d: malloc (%lu) failed", ln,
246 strlcpy (section, line + 1, i);
250 /* Deal with assignments. */
251 for (i = 0; i < sz; i++)
254 /* If no section, we are ignoring the lines. */
257 warnx("conf_parse_line: %d: ignoring line due to no section", ln);
260 line[strcspn (line, " \t=")] = '\0';
261 val = line + i + 1 + strspn (line + i + 1, " \t");
262 /* Skip trailing whitespace, if any */
263 for (j = sz - (val - line) - 1; j > 0 && isspace (val[j]); j--)
265 /* XXX Perhaps should we not ignore errors? */
266 conf_set (trans, section, line, val, 0, 0);
270 /* Other non-empty lines are weird. */
271 i = strspn (line, " \t");
273 warnx("conf_parse_line: %d: syntax error", ln);
278 /* Parse the mapped configuration file. */
280 conf_parse (int trans, char *buf, size_t sz)
283 char *bufend = buf + sz;
291 /* Check for escaped newlines. */
292 if (cp > buf && *(cp - 1) == '\\')
293 *(cp - 1) = *cp = ' ';
297 conf_parse_line (trans, line, cp - line);
304 warnx("conf_parse: last line non-terminated, ignored.");
308 conf_load_defaults (int tr)
319 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
320 LIST_INIT (&conf_bindings[i]);
321 TAILQ_INIT (&conf_trans_queue);
325 /* Open the config file and map it into our address space, then parse it. */
329 struct conf_binding *cb = 0;
333 char *new_conf_addr = 0;
336 if ((stat (conf_path, &sb) == 0) || (errno != ENOENT))
339 fd = open (conf_path, O_RDONLY, 0);
342 warnx("conf_reinit: open (\"%s\", O_RDONLY) failed", conf_path);
346 new_conf_addr = malloc (sz);
349 warnx("conf_reinit: malloc (%lu) failed", (unsigned long)sz);
353 /* XXX I assume short reads won't happen here. */
354 if (read (fd, new_conf_addr, sz) != (int)sz)
356 warnx("conf_reinit: read (%d, %p, %lu) failed",
357 fd, new_conf_addr, (unsigned long)sz);
362 trans = conf_begin ();
364 /* XXX Should we not care about errors and rollback? */
365 conf_parse (trans, new_conf_addr, sz);
368 trans = conf_begin ();
370 /* Load default configuration values. */
371 conf_load_defaults (trans);
373 /* Free potential existing configuration. */
376 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
377 for (cb = LIST_FIRST (&conf_bindings[i]); cb;
378 cb = LIST_FIRST (&conf_bindings[i]))
379 conf_remove_now (cb->section, cb->tag);
384 conf_addr = new_conf_addr;
389 free (new_conf_addr);
394 * Return the numeric value denoted by TAG in section SECTION or DEF
395 * if that tag does not exist.
398 conf_get_num (char *section, char *tag, int def)
400 char *value = conf_get_str (section, tag);
407 /* Validate X according to the range denoted by TAG in section SECTION. */
409 conf_match_num (char *section, char *tag, int x)
411 char *value = conf_get_str (section, tag);
412 int val, min, max, n;
416 n = sscanf (value, "%d,%d:%d", &val, &min, &max);
420 warnx("conf_match_num: %s:%s %d==%d?", section, tag, val, x);
423 warnx("conf_match_num: %s:%s %d<=%d<=%d?", section, tag, min, x, max);
424 return min <= x && max >= x;
426 warnx("conf_match_num: section %s tag %s: invalid number spec %s",
427 section, tag, value);
432 /* Return the string value denoted by TAG in section SECTION. */
434 conf_get_str (char *section, char *tag)
436 struct conf_binding *cb;
438 for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb;
439 cb = LIST_NEXT (cb, link))
440 if (strcasecmp (section, cb->section) == 0
441 && strcasecmp (tag, cb->tag) == 0)
449 * Build a list of string values out of the comma separated value denoted by
453 conf_get_list (char *section, char *tag)
455 char *liststr = 0, *p, *field, *t;
456 struct conf_list *list = 0;
457 struct conf_list_node *node;
459 list = malloc (sizeof *list);
462 TAILQ_INIT (&list->fields);
464 liststr = conf_get_str (section, tag);
467 liststr = strdup (liststr);
471 while ((field = strsep (&p, ",")) != NULL)
473 /* Skip leading whitespace */
474 while (isspace (*field))
476 /* Skip trailing whitespace */
478 for (t = p - 1; t > field && isspace (*t); t--)
482 warnx("conf_get_list: empty field, ignoring...");
486 node = calloc (1, sizeof *node);
489 node->field = strdup (field);
494 TAILQ_INSERT_TAIL (&list->fields, node, link);
501 conf_free_list (list);
508 conf_get_tag_list (char *section)
510 struct conf_list *list = 0;
511 struct conf_list_node *node;
512 struct conf_binding *cb;
514 list = malloc (sizeof *list);
517 TAILQ_INIT (&list->fields);
519 for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb;
520 cb = LIST_NEXT (cb, link))
521 if (strcasecmp (section, cb->section) == 0)
524 node = calloc (1, sizeof *node);
527 node->field = strdup (cb->tag);
532 TAILQ_INSERT_TAIL (&list->fields, node, link);
538 conf_free_list (list);
542 /* Decode a PEM encoded buffer. */
544 conf_decode_base64 (u_int8_t *out, u_int32_t *len, u_char *buf)
547 u_int8_t c1, c2, c3, c4;
551 if (*buf > 127 || (c1 = asc2bin[*buf]) == 255)
555 if (*buf > 127 || (c2 = asc2bin[*buf]) == 255)
564 /* Check last four bit */
568 if (strcmp ((char *)buf, "==") == 0)
573 else if (*buf > 127 || (c3 = asc2bin[*buf]) == 255)
582 /* Check last two bit */
586 if (strcmp ((char *)buf, "="))
590 else if (*buf > 127 || (c4 = asc2bin[*buf]) == 255)
597 *out++ = (c1 << 2) | (c2 >> 4);
598 *out++ = (c2 << 4) | (c3 >> 2);
599 *out++ = (c3 << 6) | c4;
608 conf_free_list (struct conf_list *list)
610 struct conf_list_node *node = TAILQ_FIRST (&list->fields);
614 TAILQ_REMOVE (&list->fields, node, link);
618 node = TAILQ_FIRST (&list->fields);
631 static struct conf_trans *
632 conf_trans_node (int transaction, enum conf_op op)
634 struct conf_trans *node;
636 node = calloc (1, sizeof *node);
639 warnx("conf_trans_node: calloc (1, %lu) failed",
640 (unsigned long)sizeof *node);
643 node->trans = transaction;
645 TAILQ_INSERT_TAIL (&conf_trans_queue, node, link);
649 /* Queue a set operation. */
651 conf_set (int transaction, char *section, char *tag, char *value, int override,
654 struct conf_trans *node;
656 node = conf_trans_node (transaction, CONF_SET);
659 node->section = strdup (section);
662 warnx("conf_set: strdup (\"%s\") failed", section);
665 node->tag = strdup (tag);
668 warnx("conf_set: strdup (\"%s\") failed", tag);
671 node->value = strdup (value);
674 warnx("conf_set: strdup (\"%s\") failed", value);
677 node->override = override;
678 node->is_default = is_default;
685 free (node->section);
691 /* Queue a remove operation. */
693 conf_remove (int transaction, char *section, char *tag)
695 struct conf_trans *node;
697 node = conf_trans_node (transaction, CONF_REMOVE);
700 node->section = strdup (section);
703 warnx("conf_remove: strdup (\"%s\") failed", section);
706 node->tag = strdup (tag);
709 warnx("conf_remove: strdup (\"%s\") failed", tag);
715 if (node && node->section)
716 free (node->section);
722 /* Queue a remove section operation. */
724 conf_remove_section (int transaction, char *section)
726 struct conf_trans *node;
728 node = conf_trans_node (transaction, CONF_REMOVE_SECTION);
731 node->section = strdup (section);
734 warnx("conf_remove_section: strdup (\"%s\") failed", section);
745 /* Execute all queued operations for this transaction. Cleanup. */
747 conf_end (int transaction, int commit)
749 struct conf_trans *node, *next;
751 for (node = TAILQ_FIRST (&conf_trans_queue); node; node = next)
753 next = TAILQ_NEXT (node, link);
754 if (node->trans == transaction)
760 conf_set_now (node->section, node->tag, node->value,
761 node->override, node->is_default);
764 conf_remove_now (node->section, node->tag);
766 case CONF_REMOVE_SECTION:
767 conf_remove_section_now (node->section);
770 warnx("conf_end: unknown operation: %d", node->op);
772 TAILQ_REMOVE (&conf_trans_queue, node, link);
774 free (node->section);
786 * Dump running configuration upon SIGUSR1.
787 * Configuration is "stored in reverse order", so reverse it again.
795 conf_report_dump (struct dumper *node)
797 /* Recursive, cleanup when we're done. */
800 conf_report_dump (node->next);
803 warnx("%s=\t%s", node->s, node->v);
806 warnx("%s", node->s);
807 if (strlen (node->s) > 0)
817 struct conf_binding *cb, *last = 0;
819 char *current_section = (char *)0;
820 struct dumper *dumper, *dnode;
822 dumper = dnode = (struct dumper *)calloc (1, sizeof *dumper);
826 warnx("conf_report: dumping running configuration");
828 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
829 for (cb = LIST_FIRST (&conf_bindings[i]); cb;
830 cb = LIST_NEXT (cb, link))
834 /* Dump this entry. */
835 if (!current_section || strcmp (cb->section, current_section))
839 len = strlen (current_section) + 3;
840 dnode->s = malloc (len);
844 snprintf (dnode->s, len, "[%s]", current_section);
846 = (struct dumper *)calloc (1, sizeof (struct dumper));
853 = (struct dumper *)calloc (1, sizeof (struct dumper));
858 current_section = cb->section;
861 dnode->v = cb->value;
862 dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper));
872 len = strlen (last->section) + 3;
873 dnode->s = malloc (len);
876 snprintf (dnode->s, len, "[%s]", last->section);
879 conf_report_dump (dumper);
884 warnx("conf_report: malloc/calloc failed");
885 while ((dnode = dumper) != 0)
887 dumper = dumper->next;