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);
54 static int conf_find_trans_xf (int, char *);
57 size_t strlcpy(char *, const char *, size_t);
60 TAILQ_ENTRY (conf_trans) link;
62 enum conf_op { CONF_SET, CONF_REMOVE, CONF_REMOVE_SECTION } op;
70 TAILQ_HEAD (conf_trans_head, conf_trans) conf_trans_queue;
75 static const u_int8_t bin2asc[]
76 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
78 static const u_int8_t asc2bin[] =
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, 255, 255, 255, 255, 255,
84 255, 255, 255, 255, 255, 255, 255, 255,
85 255, 255, 255, 62, 255, 255, 255, 63,
86 52, 53, 54, 55, 56, 57, 58, 59,
87 60, 61, 255, 255, 255, 255, 255, 255,
88 255, 0, 1, 2, 3, 4, 5, 6,
89 7, 8, 9, 10, 11, 12, 13, 14,
90 15, 16, 17, 18, 19, 20, 21, 22,
91 23, 24, 25, 255, 255, 255, 255, 255,
92 255, 26, 27, 28, 29, 30, 31, 32,
93 33, 34, 35, 36, 37, 38, 39, 40,
94 41, 42, 43, 44, 45, 46, 47, 48,
95 49, 50, 51, 255, 255, 255, 255, 255
99 LIST_ENTRY (conf_binding) link;
107 LIST_HEAD (conf_bindings, conf_binding) conf_bindings[256];
109 static char *conf_addr;
111 static __inline__ u_int8_t
117 hash = ((hash << 1) | (hash >> 7)) ^ tolower (*s);
124 * Insert a tag-value combination from LINE (the equal sign is at POS)
127 conf_remove_now(char *section, char *tag)
129 struct conf_binding *cb, *next;
131 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
132 for (; cb; cb = next) {
133 next = LIST_NEXT(cb, link);
134 if (strcasecmp(cb->section, section) == 0
135 && strcasecmp(cb->tag, tag) == 0) {
136 LIST_REMOVE(cb, link);
137 xlog(LOG_INFO,"[%s]:%s->%s removed", section, tag, cb->value);
149 conf_remove_section_now(char *section)
151 struct conf_binding *cb, *next;
154 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
155 for (; cb; cb = next) {
156 next = LIST_NEXT(cb, link);
157 if (strcasecmp(cb->section, section) == 0) {
159 LIST_REMOVE(cb, link);
160 xlog(LOG_INFO, "[%s]:%s->%s removed", section, cb->tag, cb->value);
171 * Insert a tag-value combination from LINE (the equal sign is at POS)
172 * into SECTION of our configuration database.
175 conf_set_now(char *section, char *tag, char *value, int override,
178 struct conf_binding *node = 0;
181 conf_remove_now(section, tag);
182 else if (conf_get_str(section, tag)) {
184 xlog(LOG_INFO, "conf_set: duplicate tag [%s]:%s, ignoring...\n",
190 node = calloc(1, sizeof *node);
192 xlog_warn("conf_set: calloc (1, %lu) failed", (unsigned long)sizeof *node);
195 node->section = strdup(section);
196 node->tag = strdup(tag);
197 node->value = strdup(value);
198 node->is_default = is_default;
200 LIST_INSERT_HEAD(&conf_bindings[conf_hash (section)], node, link);
205 * Parse the line LINE of SZ bytes. Skip Comments, recognize section
206 * headers and feed tag-value pairs into our configuration database.
209 conf_parse_line(int trans, char *line, size_t sz)
214 static char *section = 0;
217 /* Lines starting with '#' or ';' are comments. */
219 if (*line == '#' || *line == ';')
222 /* '[section]' parsing... */
224 for (i = 1; i < sz; i++)
230 xlog_warn("conf_parse_line: %d:"
231 "non-matched ']', ignoring until next section", ln);
237 xlog_warn("conf_parse_line: %d: malloc (%lu) failed", ln,
241 strlcpy(section, line + 1, i);
245 /* Deal with assignments. */
246 for (i = 0; i < sz; i++) {
247 if (line[i] == '=') {
248 /* If no section, we are ignoring the lines. */
250 xlog_warn("conf_parse_line: %d: ignoring line due to no section",
254 line[strcspn (line, " \t=")] = '\0';
255 val = line + i + 1 + strspn (line + i + 1, " \t");
256 /* Skip trailing whitespace, if any */
257 for (j = sz - (val - line) - 1; j > 0 && isspace(val[j]); j--)
259 /* XXX Perhaps should we not ignore errors? */
260 conf_set(trans, section, line, val, 0, 0);
264 /* Other non-empty lines are weird. */
265 i = strspn(line, " \t");
267 xlog_warn("conf_parse_line: %d: syntax error", ln);
272 /* Parse the mapped configuration file. */
274 conf_parse(int trans, char *buf, size_t sz)
277 char *bufend = buf + sz;
281 while (cp < bufend) {
283 /* Check for escaped newlines. */
284 if (cp > buf && *(cp - 1) == '\\')
285 *(cp - 1) = *cp = ' ';
288 conf_parse_line(trans, line, cp - line);
295 xlog_warn("conf_parse: last line non-terminated, ignored.");
299 conf_load_defaults(int tr)
310 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
311 LIST_INIT (&conf_bindings[i]);
313 TAILQ_INIT (&conf_trans_queue);
317 /* Open the config file and map it into our address space, then parse it. */
321 struct conf_binding *cb = 0;
325 char *new_conf_addr = 0;
328 if ((stat (conf_path, &sb) == 0) || (errno != ENOENT)) {
330 fd = open (conf_path, O_RDONLY, 0);
332 xlog_warn("conf_reinit: open (\"%s\", O_RDONLY) failed", conf_path);
336 new_conf_addr = malloc(sz);
337 if (!new_conf_addr) {
338 xlog_warn("conf_reinit: malloc (%lu) failed", (unsigned long)sz);
342 /* XXX I assume short reads won't happen here. */
343 if (read (fd, new_conf_addr, sz) != (int)sz) {
344 xlog_warn("conf_reinit: read (%d, %p, %lu) failed",
345 fd, new_conf_addr, (unsigned long)sz);
350 trans = conf_begin();
351 /* XXX Should we not care about errors and rollback? */
352 conf_parse(trans, new_conf_addr, sz);
355 trans = conf_begin();
357 /* Load default configuration values. */
358 conf_load_defaults(trans);
360 /* Free potential existing configuration. */
362 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++) {
363 cb = LIST_FIRST (&conf_bindings[i]);
364 for (; cb; cb = LIST_FIRST (&conf_bindings[i]))
365 conf_remove_now(cb->section, cb->tag);
371 conf_addr = new_conf_addr;
381 * Return the numeric value denoted by TAG in section SECTION or DEF
382 * if that tag does not exist.
385 conf_get_num(char *section, char *tag, int def)
387 char *value = conf_get_str(section, tag);
395 /* Validate X according to the range denoted by TAG in section SECTION. */
397 conf_match_num(char *section, char *tag, int x)
399 char *value = conf_get_str (section, tag);
400 int val, min, max, n;
404 n = sscanf (value, "%d,%d:%d", &val, &min, &max);
407 xlog(LOG_INFO, "conf_match_num: %s:%s %d==%d?", section, tag, val, x);
410 xlog(LOG_INFO, "conf_match_num: %s:%s %d<=%d<=%d?", section,
412 return min <= x && max >= x;
414 xlog(LOG_INFO, "conf_match_num: section %s tag %s: invalid number spec %s",
415 section, tag, value);
420 /* Return the string value denoted by TAG in section SECTION. */
422 conf_get_str(char *section, char *tag)
424 struct conf_binding *cb;
426 cb = LIST_FIRST (&conf_bindings[conf_hash (section)]);
427 for (; cb; cb = LIST_NEXT (cb, link)) {
428 if (strcasecmp (section, cb->section) == 0
429 && strcasecmp (tag, cb->tag) == 0)
436 * Build a list of string values out of the comma separated value denoted by
440 conf_get_list(char *section, char *tag)
442 char *liststr = 0, *p, *field, *t;
443 struct conf_list *list = 0;
444 struct conf_list_node *node;
446 list = malloc (sizeof *list);
449 TAILQ_INIT (&list->fields);
451 liststr = conf_get_str(section, tag);
454 liststr = strdup (liststr);
458 while ((field = strsep (&p, ",")) != NULL) {
459 /* Skip leading whitespace */
460 while (isspace (*field))
462 /* Skip trailing whitespace */
464 for (t = p - 1; t > field && isspace (*t); t--)
467 if (*field == '\0') {
468 xlog(LOG_INFO, "conf_get_list: empty field, ignoring...");
472 node = calloc (1, sizeof *node);
475 node->field = strdup (field);
480 TAILQ_INSERT_TAIL (&list->fields, node, link);
487 conf_free_list(list);
494 conf_get_tag_list(char *section)
496 struct conf_list *list = 0;
497 struct conf_list_node *node;
498 struct conf_binding *cb;
500 list = malloc(sizeof *list);
503 TAILQ_INIT(&list->fields);
505 cb = LIST_FIRST(&conf_bindings[conf_hash (section)]);
506 for (; cb; cb = LIST_NEXT(cb, link)) {
507 if (strcasecmp (section, cb->section) == 0) {
509 node = calloc(1, sizeof *node);
512 node->field = strdup(cb->tag);
517 TAILQ_INSERT_TAIL(&list->fields, node, link);
524 conf_free_list(list);
528 /* Decode a PEM encoded buffer. */
530 conf_decode_base64 (u_int8_t *out, u_int32_t *len, u_char *buf)
533 u_int8_t c1, c2, c3, c4;
536 if (*buf > 127 || (c1 = asc2bin[*buf]) == 255)
540 if (*buf > 127 || (c2 = asc2bin[*buf]) == 255)
548 /* Check last four bit */
552 if (strcmp((char *)buf, "==") == 0)
556 } else if (*buf > 127 || (c3 = asc2bin[*buf]) == 255)
563 /* Check last two bit */
567 if (strcmp((char *)buf, "="))
569 } else if (*buf > 127 || (c4 = asc2bin[*buf]) == 255)
576 *out++ = (c1 << 2) | (c2 >> 4);
577 *out++ = (c2 << 4) | (c3 >> 2);
578 *out++ = (c3 << 6) | c4;
586 conf_free_list(struct conf_list *list)
588 struct conf_list_node *node = TAILQ_FIRST(&list->fields);
591 TAILQ_REMOVE(&list->fields, node, link);
595 node = TAILQ_FIRST(&list->fields);
608 static struct conf_trans *
609 conf_trans_node(int transaction, enum conf_op op)
611 struct conf_trans *node;
613 node = calloc (1, sizeof *node);
615 xlog_warn("conf_trans_node: calloc (1, %lu) failed",
616 (unsigned long)sizeof *node);
619 node->trans = transaction;
621 TAILQ_INSERT_TAIL (&conf_trans_queue, node, link);
625 /* Queue a set operation. */
627 conf_set(int transaction, char *section, char *tag,
628 char *value, int override, int is_default)
630 struct conf_trans *node;
632 node = conf_trans_node(transaction, CONF_SET);
635 node->section = strdup(section);
636 if (!node->section) {
637 xlog_warn("conf_set: strdup(\"%s\") failed", section);
640 node->tag = strdup(tag);
642 xlog_warn("conf_set: strdup(\"%s\") failed", tag);
645 node->value = strdup(value);
647 xlog_warn("conf_set: strdup(\"%s\") failed", value);
650 node->override = override;
651 node->is_default = is_default;
664 /* Queue a remove operation. */
666 conf_remove(int transaction, char *section, char *tag)
668 struct conf_trans *node;
670 node = conf_trans_node(transaction, CONF_REMOVE);
673 node->section = strdup(section);
674 if (!node->section) {
675 xlog_warn("conf_remove: strdup(\"%s\") failed", section);
678 node->tag = strdup(tag);
680 xlog_warn("conf_remove: strdup(\"%s\") failed", tag);
686 if (node && node->section)
687 free (node->section);
693 /* Queue a remove section operation. */
695 conf_remove_section(int transaction, char *section)
697 struct conf_trans *node;
699 node = conf_trans_node(transaction, CONF_REMOVE_SECTION);
702 node->section = strdup(section);
703 if (!node->section) {
704 xlog_warn("conf_remove_section: strdup(\"%s\") failed", section);
715 /* Execute all queued operations for this transaction. Cleanup. */
717 conf_end(int transaction, int commit)
719 struct conf_trans *node, *next;
721 for (node = TAILQ_FIRST(&conf_trans_queue); node; node = next) {
722 next = TAILQ_NEXT(node, link);
723 if (node->trans == transaction) {
727 conf_set_now(node->section, node->tag, node->value,
728 node->override, node->is_default);
731 conf_remove_now(node->section, node->tag);
733 case CONF_REMOVE_SECTION:
734 conf_remove_section_now(node->section);
737 xlog(LOG_INFO, "conf_end: unknown operation: %d", node->op);
740 TAILQ_REMOVE (&conf_trans_queue, node, link);
754 * Dump running configuration upon SIGUSR1.
755 * Configuration is "stored in reverse order", so reverse it again.
763 conf_report_dump(struct dumper *node)
765 /* Recursive, cleanup when we're done. */
767 conf_report_dump(node->next);
770 xlog(LOG_INFO, "%s=\t%s", node->s, node->v);
772 xlog(LOG_INFO, "%s", node->s);
773 if (strlen(node->s) > 0)
783 struct conf_binding *cb, *last = 0;
785 char *current_section = (char *)0;
786 struct dumper *dumper, *dnode;
788 dumper = dnode = (struct dumper *)calloc(1, sizeof *dumper);
792 xlog(LOG_INFO, "conf_report: dumping running configuration");
794 for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++)
795 for (cb = LIST_FIRST(&conf_bindings[i]); cb; cb = LIST_NEXT(cb, link)) {
796 if (!cb->is_default) {
797 /* Dump this entry. */
798 if (!current_section || strcmp(cb->section, current_section)) {
799 if (current_section) {
800 len = strlen (current_section) + 3;
801 dnode->s = malloc(len);
805 snprintf(dnode->s, len, "[%s]", current_section);
807 (struct dumper *)calloc(1, sizeof (struct dumper));
814 (struct dumper *)calloc(1, sizeof (struct dumper));
819 current_section = cb->section;
822 dnode->v = cb->value;
823 dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper));
832 len = strlen(last->section) + 3;
833 dnode->s = malloc(len);
836 snprintf(dnode->s, len, "[%s]", last->section);
838 conf_report_dump(dumper);
842 xlog_warn("conf_report: malloc/calloc failed");
843 while ((dnode = dumper) != 0) {
844 dumper = dumper->next;