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>
52 static void conf_load_defaults (int);
55 TAILQ_ENTRY (conf_trans) link;
57 enum conf_op { CONF_SET, CONF_REMOVE, CONF_REMOVE_SECTION } op;
65 TAILQ_HEAD (conf_trans_head, conf_trans) conf_trans_queue;
70 static const u_int8_t bin2asc[]
71 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
73 static const u_int8_t asc2bin[] =
75 255, 255, 255, 255, 255, 255, 255, 255,
76 255, 255, 255, 255, 255, 255, 255, 255,
77 255, 255, 255, 255, 255, 255, 255, 255,
78 255, 255, 255, 255, 255, 255, 255, 255,
79 255, 255, 255, 255, 255, 255, 255, 255,
80 255, 255, 255, 62, 255, 255, 255, 63,
81 52, 53, 54, 55, 56, 57, 58, 59,
82 60, 61, 255, 255, 255, 255, 255, 255,
83 255, 0, 1, 2, 3, 4, 5, 6,
84 7, 8, 9, 10, 11, 12, 13, 14,
85 15, 16, 17, 18, 19, 20, 21, 22,
86 23, 24, 25, 255, 255, 255, 255, 255,
87 255, 26, 27, 28, 29, 30, 31, 32,
88 33, 34, 35, 36, 37, 38, 39, 40,
89 41, 42, 43, 44, 45, 46, 47, 48,
90 49, 50, 51, 255, 255, 255, 255, 255
94 LIST_ENTRY (conf_binding) link;
102 LIST_HEAD (conf_bindings, conf_binding) conf_bindings[256];
104 static char *conf_addr;
106 static __inline__ u_int8_t
112 hash = ((hash << 1) | (hash >> 7)) ^ tolower (*s);
119 * Insert a tag-value combination from LINE (the equal sign is at POS)
122 conf_remove_now(char *section, char *tag)
124 struct conf_binding *cb, *next;
126 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
127 for (; cb; cb = next) {
128 next = LIST_NEXT(cb, link);
129 if (strcasecmp(cb->section, section) == 0
130 && strcasecmp(cb->tag, tag) == 0) {
131 LIST_REMOVE(cb, link);
132 xlog(LOG_INFO,"[%s]:%s->%s removed", section, tag, cb->value);
144 conf_remove_section_now(char *section)
146 struct conf_binding *cb, *next;
149 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
150 for (; cb; cb = next) {
151 next = LIST_NEXT(cb, link);
152 if (strcasecmp(cb->section, section) == 0) {
154 LIST_REMOVE(cb, link);
155 xlog(LOG_INFO, "[%s]:%s->%s removed", section, cb->tag, cb->value);
166 * Insert a tag-value combination from LINE (the equal sign is at POS)
167 * into SECTION of our configuration database.
170 conf_set_now(char *section, char *tag, char *value, int override,
173 struct conf_binding *node = 0;
176 conf_remove_now(section, tag);
177 else if (conf_get_str(section, tag)) {
179 xlog(LOG_INFO, "conf_set: duplicate tag [%s]:%s, ignoring...\n",
185 node = calloc(1, sizeof *node);
187 xlog_warn("conf_set: calloc (1, %lu) failed", (unsigned long)sizeof *node);
190 node->section = strdup(section);
191 node->tag = strdup(tag);
192 node->value = strdup(value);
193 node->is_default = is_default;
195 LIST_INSERT_HEAD(&conf_bindings[conf_hash (section)], node, link);
200 * Parse the line LINE of SZ bytes. Skip Comments, recognize section
201 * headers and feed tag-value pairs into our configuration database.
204 conf_parse_line(int trans, char *line, size_t sz)
209 static char *section = 0;
212 /* Lines starting with '#' or ';' are comments. */
214 if (*line == '#' || *line == ';')
217 /* Ignore blank lines */
221 /* Strip off any leading blanks */
222 while (isblank(*line))
225 /* '[section]' parsing... */
228 /* Strip off any blanks after '[' */
229 while (isblank(*line))
232 for (i = 0; i < sz; i++) {
233 if (line[i] == ']') {
240 xlog_warn("conf_parse_line: %d:"
241 "non-matched ']', ignoring until next section", ln);
245 /* Strip off any blanks before ']' */
247 while (*val && !isblank(*val))
254 xlog_warn("conf_parse_line: %d: malloc (%lu) failed", ln,
258 strncpy(section, line, i);
262 /* Deal with assignments. */
263 for (i = 0; i < sz; i++) {
264 if (line[i] == '=') {
265 /* If no section, we are ignoring the lines. */
267 xlog_warn("conf_parse_line: %d: ignoring line due to no section",
271 line[strcspn (line, " \t=")] = '\0';
272 val = line + i + 1 + strspn (line + i + 1, " \t");
273 /* Skip trailing whitespace, if any */
274 for (j = sz - (val - line) - 1; j > 0 && isspace(val[j]); j--)
276 /* XXX Perhaps should we not ignore errors? */
277 conf_set(trans, section, line, val, 0, 0);
281 /* Other non-empty lines are weird. */
282 i = strspn(line, " \t");
284 xlog_warn("conf_parse_line: %d: syntax error", ln);
289 /* Parse the mapped configuration file. */
291 conf_parse(int trans, char *buf, size_t sz)
294 char *bufend = buf + sz;
298 while (cp < bufend) {
300 /* Check for escaped newlines. */
301 if (cp > buf && *(cp - 1) == '\\')
302 *(cp - 1) = *cp = ' ';
305 conf_parse_line(trans, line, cp - line);
312 xlog_warn("conf_parse: last line non-terminated, ignored.");
316 conf_load_defaults(int tr)
327 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
328 LIST_INIT (&conf_bindings[i]);
330 TAILQ_INIT (&conf_trans_queue);
334 /* Open the config file and map it into our address space, then parse it. */
338 struct conf_binding *cb = 0;
342 char *new_conf_addr = 0;
345 if ((stat (conf_path, &sb) == 0) || (errno != ENOENT)) {
347 fd = open (conf_path, O_RDONLY, 0);
349 xlog_warn("conf_reinit: open (\"%s\", O_RDONLY) failed", conf_path);
353 new_conf_addr = malloc(sz);
354 if (!new_conf_addr) {
355 xlog_warn("conf_reinit: malloc (%lu) failed", (unsigned long)sz);
359 /* XXX I assume short reads won't happen here. */
360 if (read (fd, new_conf_addr, sz) != (int)sz) {
361 xlog_warn("conf_reinit: read (%d, %p, %lu) failed",
362 fd, new_conf_addr, (unsigned long)sz);
367 trans = conf_begin();
368 /* XXX Should we not care about errors and rollback? */
369 conf_parse(trans, new_conf_addr, sz);
372 trans = conf_begin();
374 /* Load default configuration values. */
375 conf_load_defaults(trans);
377 /* Free potential existing configuration. */
379 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++) {
380 cb = LIST_FIRST (&conf_bindings[i]);
381 for (; cb; cb = LIST_FIRST (&conf_bindings[i]))
382 conf_remove_now(cb->section, cb->tag);
388 conf_addr = new_conf_addr;
398 * Return the numeric value denoted by TAG in section SECTION or DEF
399 * if that tag does not exist.
402 conf_get_num(char *section, char *tag, int def)
404 char *value = conf_get_str(section, tag);
412 /* Validate X according to the range denoted by TAG in section SECTION. */
414 conf_match_num(char *section, char *tag, int x)
416 char *value = conf_get_str (section, tag);
417 int val, min, max, n;
421 n = sscanf (value, "%d,%d:%d", &val, &min, &max);
424 xlog(LOG_INFO, "conf_match_num: %s:%s %d==%d?", section, tag, val, x);
427 xlog(LOG_INFO, "conf_match_num: %s:%s %d<=%d<=%d?", section,
429 return min <= x && max >= x;
431 xlog(LOG_INFO, "conf_match_num: section %s tag %s: invalid number spec %s",
432 section, tag, value);
437 /* Return the string value denoted by TAG in section SECTION. */
439 conf_get_str(char *section, char *tag)
441 struct conf_binding *cb;
443 cb = LIST_FIRST (&conf_bindings[conf_hash (section)]);
444 for (; cb; cb = LIST_NEXT (cb, link)) {
445 if (strcasecmp (section, cb->section) == 0
446 && strcasecmp (tag, cb->tag) == 0)
453 * Build a list of string values out of the comma separated value denoted by
457 conf_get_list(char *section, char *tag)
459 char *liststr = 0, *p, *field, *t;
460 struct conf_list *list = 0;
461 struct conf_list_node *node;
463 list = malloc (sizeof *list);
466 TAILQ_INIT (&list->fields);
468 liststr = conf_get_str(section, tag);
471 liststr = strdup (liststr);
475 while ((field = strsep (&p, ",")) != NULL) {
476 /* Skip leading whitespace */
477 while (isspace (*field))
479 /* Skip trailing whitespace */
481 for (t = p - 1; t > field && isspace (*t); t--)
484 if (*field == '\0') {
485 xlog(LOG_INFO, "conf_get_list: empty field, ignoring...");
489 node = calloc (1, sizeof *node);
492 node->field = strdup (field);
497 TAILQ_INSERT_TAIL (&list->fields, node, link);
504 conf_free_list(list);
511 conf_get_tag_list(char *section)
513 struct conf_list *list = 0;
514 struct conf_list_node *node;
515 struct conf_binding *cb;
517 list = malloc(sizeof *list);
520 TAILQ_INIT(&list->fields);
522 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
523 for (; cb; cb = LIST_NEXT(cb, link)) {
524 if (strcasecmp (section, cb->section) == 0) {
526 node = calloc(1, sizeof *node);
529 node->field = strdup(cb->tag);
534 TAILQ_INSERT_TAIL(&list->fields, node, link);
541 conf_free_list(list);
545 /* Decode a PEM encoded buffer. */
547 conf_decode_base64 (u_int8_t *out, u_int32_t *len, u_char *buf)
550 u_int8_t c1, c2, c3, c4;
553 if (*buf > 127 || (c1 = asc2bin[*buf]) == 255)
557 if (*buf > 127 || (c2 = asc2bin[*buf]) == 255)
565 /* Check last four bit */
569 if (strcmp((char *)buf, "==") == 0)
573 } else if (*buf > 127 || (c3 = asc2bin[*buf]) == 255)
580 /* Check last two bit */
584 if (strcmp((char *)buf, "="))
586 } else if (*buf > 127 || (c4 = asc2bin[*buf]) == 255)
593 *out++ = (c1 << 2) | (c2 >> 4);
594 *out++ = (c2 << 4) | (c3 >> 2);
595 *out++ = (c3 << 6) | c4;
603 conf_free_list(struct conf_list *list)
605 struct conf_list_node *node = TAILQ_FIRST(&list->fields);
608 TAILQ_REMOVE(&list->fields, node, link);
612 node = TAILQ_FIRST(&list->fields);
625 static struct conf_trans *
626 conf_trans_node(int transaction, enum conf_op op)
628 struct conf_trans *node;
630 node = calloc (1, sizeof *node);
632 xlog_warn("conf_trans_node: calloc (1, %lu) failed",
633 (unsigned long)sizeof *node);
636 node->trans = transaction;
638 TAILQ_INSERT_TAIL (&conf_trans_queue, node, link);
642 /* Queue a set operation. */
644 conf_set(int transaction, char *section, char *tag,
645 char *value, int override, int is_default)
647 struct conf_trans *node;
649 node = conf_trans_node(transaction, CONF_SET);
652 node->section = strdup(section);
653 if (!node->section) {
654 xlog_warn("conf_set: strdup(\"%s\") failed", section);
657 node->tag = strdup(tag);
659 xlog_warn("conf_set: strdup(\"%s\") failed", tag);
662 node->value = strdup(value);
664 xlog_warn("conf_set: strdup(\"%s\") failed", value);
667 node->override = override;
668 node->is_default = is_default;
681 /* Queue a remove operation. */
683 conf_remove(int transaction, char *section, char *tag)
685 struct conf_trans *node;
687 node = conf_trans_node(transaction, CONF_REMOVE);
690 node->section = strdup(section);
691 if (!node->section) {
692 xlog_warn("conf_remove: strdup(\"%s\") failed", section);
695 node->tag = strdup(tag);
697 xlog_warn("conf_remove: strdup(\"%s\") failed", tag);
703 if (node && node->section)
704 free (node->section);
710 /* Queue a remove section operation. */
712 conf_remove_section(int transaction, char *section)
714 struct conf_trans *node;
716 node = conf_trans_node(transaction, CONF_REMOVE_SECTION);
719 node->section = strdup(section);
720 if (!node->section) {
721 xlog_warn("conf_remove_section: strdup(\"%s\") failed", section);
732 /* Execute all queued operations for this transaction. Cleanup. */
734 conf_end(int transaction, int commit)
736 struct conf_trans *node, *next;
738 for (node = TAILQ_FIRST(&conf_trans_queue); node; node = next) {
739 next = TAILQ_NEXT(node, link);
740 if (node->trans == transaction) {
744 conf_set_now(node->section, node->tag, node->value,
745 node->override, node->is_default);
748 conf_remove_now(node->section, node->tag);
750 case CONF_REMOVE_SECTION:
751 conf_remove_section_now(node->section);
754 xlog(LOG_INFO, "conf_end: unknown operation: %d", node->op);
757 TAILQ_REMOVE (&conf_trans_queue, node, link);
771 * Dump running configuration upon SIGUSR1.
772 * Configuration is "stored in reverse order", so reverse it again.
780 conf_report_dump(struct dumper *node)
782 /* Recursive, cleanup when we're done. */
784 conf_report_dump(node->next);
787 xlog(LOG_INFO, "%s=\t%s", node->s, node->v);
789 xlog(LOG_INFO, "%s", node->s);
790 if (strlen(node->s) > 0)
800 struct conf_binding *cb, *last = 0;
802 char *current_section = (char *)0;
803 struct dumper *dumper, *dnode;
805 dumper = dnode = (struct dumper *)calloc(1, sizeof *dumper);
809 xlog(LOG_INFO, "conf_report: dumping running configuration");
811 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
812 for (cb = LIST_FIRST(&conf_bindings[i]); cb; cb = LIST_NEXT(cb, link)) {
813 if (!cb->is_default) {
814 /* Dump this entry. */
815 if (!current_section || strcmp(cb->section, current_section)) {
816 if (current_section) {
817 len = strlen (current_section) + 3;
818 dnode->s = malloc(len);
822 snprintf(dnode->s, len, "[%s]", current_section);
824 (struct dumper *)calloc(1, sizeof (struct dumper));
831 (struct dumper *)calloc(1, sizeof (struct dumper));
836 current_section = cb->section;
839 dnode->v = cb->value;
840 dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper));
849 len = strlen(last->section) + 3;
850 dnode->s = malloc(len);
853 snprintf(dnode->s, len, "[%s]", last->section);
855 conf_report_dump(dumper);
859 xlog_warn("conf_report: malloc/calloc failed");
860 while ((dnode = dumper) != 0) {
861 dumper = dumper->next;