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-rw-r--r--src/libstrongswan/utils/settings.c1227
1 files changed, 1227 insertions, 0 deletions
diff --git a/src/libstrongswan/utils/settings.c b/src/libstrongswan/utils/settings.c
new file mode 100644
index 000000000..712ea6ee2
--- /dev/null
+++ b/src/libstrongswan/utils/settings.c
@@ -0,0 +1,1227 @@
+/*
+ * Copyright (C) 2010 Tobias Brunner
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <errno.h>
+#include <limits.h>
+#include <libgen.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef HAVE_GLOB_H
+#include <glob.h>
+#endif /* HAVE_GLOB_H */
+
+#include "settings.h"
+
+#include "collections/linked_list.h"
+#include "threading/rwlock.h"
+#include "utils/debug.h"
+
+#define MAX_INCLUSION_LEVEL 10
+
+typedef struct private_settings_t private_settings_t;
+typedef struct section_t section_t;
+typedef struct kv_t kv_t;
+
+/**
+ * private data of settings
+ */
+struct private_settings_t {
+
+ /**
+ * public functions
+ */
+ settings_t public;
+
+ /**
+ * top level section
+ */
+ section_t *top;
+
+ /**
+ * contents of loaded files and in-memory settings (char*)
+ */
+ linked_list_t *contents;
+
+ /**
+ * lock to safely access the settings
+ */
+ rwlock_t *lock;
+};
+
+/**
+ * section containing subsections and key value pairs
+ */
+struct section_t {
+
+ /**
+ * name of the section
+ */
+ char *name;
+
+ /**
+ * subsections, as section_t
+ */
+ linked_list_t *sections;
+
+ /**
+ * key value pairs, as kv_t
+ */
+ linked_list_t *kv;
+};
+
+/**
+ * Key value pair
+ */
+struct kv_t {
+
+ /**
+ * key string, relative
+ */
+ char *key;
+
+ /**
+ * value as string
+ */
+ char *value;
+};
+
+/**
+ * create a key/value pair
+ */
+static kv_t *kv_create(char *key, char *value)
+{
+ kv_t *this;
+ INIT(this,
+ .key = strdup(key),
+ .value = value,
+ );
+ return this;
+}
+
+/**
+ * destroy a key/value pair
+ */
+static void kv_destroy(kv_t *this)
+{
+ free(this->key);
+ free(this);
+}
+
+/**
+ * create a section with the given name
+ */
+static section_t *section_create(char *name)
+{
+ section_t *this;
+ INIT(this,
+ .name = strdupnull(name),
+ .sections = linked_list_create(),
+ .kv = linked_list_create(),
+ );
+ return this;
+}
+
+/**
+ * destroy a section
+ */
+static void section_destroy(section_t *this)
+{
+ this->kv->destroy_function(this->kv, (void*)kv_destroy);
+ this->sections->destroy_function(this->sections, (void*)section_destroy);
+ free(this->name);
+ free(this);
+}
+
+/**
+ * Purge contents of a section
+ */
+static void section_purge(section_t *this)
+{
+ this->kv->destroy_function(this->kv, (void*)kv_destroy);
+ this->kv = linked_list_create();
+ this->sections->destroy_function(this->sections, (void*)section_destroy);
+ this->sections = linked_list_create();
+}
+
+/**
+ * callback to find a section by name
+ */
+static bool section_find(section_t *this, char *name)
+{
+ return streq(this->name, name);
+}
+
+/**
+ * callback to find a kv pair by key
+ */
+static bool kv_find(kv_t *this, char *key)
+{
+ return streq(this->key, key);
+}
+
+/**
+ * Print a format key, but consume already processed arguments
+ */
+static bool print_key(char *buf, int len, char *start, char *key, va_list args)
+{
+ va_list copy;
+ bool res;
+ char *pos;
+
+ va_copy(copy, args);
+ while (start < key)
+ {
+ pos = strchr(start, '%');
+ if (!pos)
+ {
+ start += strlen(start) + 1;
+ continue;
+ }
+ pos++;
+ switch (*pos)
+ {
+ case 'd':
+ va_arg(copy, int);
+ break;
+ case 's':
+ va_arg(copy, char*);
+ break;
+ case 'N':
+ va_arg(copy, enum_name_t*);
+ va_arg(copy, int);
+ break;
+ case '%':
+ break;
+ default:
+ DBG1(DBG_CFG, "settings with %%%c not supported!", *pos);
+ break;
+ }
+ start = pos;
+ if (*start)
+ {
+ start++;
+ }
+ }
+ res = vsnprintf(buf, len, key, copy) < len;
+ va_end(copy);
+ return res;
+}
+
+/**
+ * Find a section by a given key, using buffered key, reusable buffer.
+ * If "ensure" is TRUE, the sections are created if they don't exist.
+ */
+static section_t *find_section_buffered(section_t *section,
+ char *start, char *key, va_list args, char *buf, int len,
+ bool ensure)
+{
+ char *pos;
+ section_t *found = NULL;
+
+ if (section == NULL)
+ {
+ return NULL;
+ }
+ pos = strchr(key, '.');
+ if (pos)
+ {
+ *pos = '\0';
+ pos++;
+ }
+ if (!print_key(buf, len, start, key, args))
+ {
+ return NULL;
+ }
+ if (section->sections->find_first(section->sections,
+ (linked_list_match_t)section_find,
+ (void**)&found, buf) != SUCCESS)
+ {
+ if (ensure)
+ {
+ found = section_create(buf);
+ section->sections->insert_last(section->sections, found);
+ }
+ }
+ if (found && pos)
+ {
+ return find_section_buffered(found, start, pos, args, buf, len, ensure);
+ }
+ return found;
+}
+
+/**
+ * Find a section by a given key (thread-safe).
+ */
+static section_t *find_section(private_settings_t *this, section_t *section,
+ char *key, va_list args)
+{
+ char buf[128], keybuf[512];
+ section_t *found;
+
+ if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
+ {
+ return NULL;
+ }
+ this->lock->read_lock(this->lock);
+ found = find_section_buffered(section, keybuf, keybuf, args, buf,
+ sizeof(buf), FALSE);
+ this->lock->unlock(this->lock);
+ return found;
+}
+
+/**
+ * Ensure that the section with the given key exists (thread-safe).
+ */
+static section_t *ensure_section(private_settings_t *this, section_t *section,
+ char *key, va_list args)
+{
+ char buf[128], keybuf[512];
+ section_t *found;
+
+ if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
+ {
+ return NULL;
+ }
+ /* we might have to change the tree */
+ this->lock->write_lock(this->lock);
+ found = find_section_buffered(section, keybuf, keybuf, args, buf,
+ sizeof(buf), TRUE);
+ this->lock->unlock(this->lock);
+ return found;
+}
+
+/**
+ * Find the key/value pair for a key, using buffered key, reusable buffer
+ * If "ensure" is TRUE, the sections (and key/value pair) are created if they
+ * don't exist.
+ */
+static kv_t *find_value_buffered(section_t *section, char *start, char *key,
+ va_list args, char *buf, int len, bool ensure)
+{
+ char *pos;
+ kv_t *kv = NULL;
+ section_t *found = NULL;
+
+ if (section == NULL)
+ {
+ return NULL;
+ }
+
+ pos = strchr(key, '.');
+ if (pos)
+ {
+ *pos = '\0';
+ pos++;
+
+ if (!print_key(buf, len, start, key, args))
+ {
+ return NULL;
+ }
+ if (section->sections->find_first(section->sections,
+ (linked_list_match_t)section_find,
+ (void**)&found, buf) != SUCCESS)
+ {
+ if (!ensure)
+ {
+ return NULL;
+ }
+ found = section_create(buf);
+ section->sections->insert_last(section->sections, found);
+ }
+ return find_value_buffered(found, start, pos, args, buf, len,
+ ensure);
+ }
+ else
+ {
+ if (!print_key(buf, len, start, key, args))
+ {
+ return NULL;
+ }
+ if (section->kv->find_first(section->kv, (linked_list_match_t)kv_find,
+ (void**)&kv, buf) != SUCCESS)
+ {
+ if (ensure)
+ {
+ kv = kv_create(buf, NULL);
+ section->kv->insert_last(section->kv, kv);
+ }
+ }
+ }
+ return kv;
+}
+
+/**
+ * Find the string value for a key (thread-safe).
+ */
+static char *find_value(private_settings_t *this, section_t *section,
+ char *key, va_list args)
+{
+ char buf[128], keybuf[512], *value = NULL;
+ kv_t *kv;
+
+ if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
+ {
+ return NULL;
+ }
+ this->lock->read_lock(this->lock);
+ kv = find_value_buffered(section, keybuf, keybuf, args, buf, sizeof(buf),
+ FALSE);
+ if (kv)
+ {
+ value = kv->value;
+ }
+ this->lock->unlock(this->lock);
+ return value;
+}
+
+/**
+ * Set a value to a copy of the given string (thread-safe).
+ */
+static void set_value(private_settings_t *this, section_t *section,
+ char *key, va_list args, char *value)
+{
+ char buf[128], keybuf[512];
+ kv_t *kv;
+
+ if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
+ {
+ return;
+ }
+ this->lock->write_lock(this->lock);
+ kv = find_value_buffered(section, keybuf, keybuf, args, buf, sizeof(buf),
+ TRUE);
+ if (kv)
+ {
+ if (!value)
+ {
+ kv->value = NULL;
+ }
+ else if (kv->value && (strlen(value) <= strlen(kv->value)))
+ { /* overwrite in-place, if possible */
+ strcpy(kv->value, value);
+ }
+ else
+ { /* otherwise clone the string and store it in the cache */
+ kv->value = strdup(value);
+ this->contents->insert_last(this->contents, kv->value);
+ }
+ }
+ this->lock->unlock(this->lock);
+}
+
+METHOD(settings_t, get_str, char*,
+ private_settings_t *this, char *key, char *def, ...)
+{
+ char *value;
+ va_list args;
+
+ va_start(args, def);
+ value = find_value(this, this->top, key, args);
+ va_end(args);
+ if (value)
+ {
+ return value;
+ }
+ return def;
+}
+
+/**
+ * Described in header
+ */
+inline bool settings_value_as_bool(char *value, bool def)
+{
+ if (value)
+ {
+ if (strcaseeq(value, "1") ||
+ strcaseeq(value, "yes") ||
+ strcaseeq(value, "true") ||
+ strcaseeq(value, "enabled"))
+ {
+ return TRUE;
+ }
+ else if (strcaseeq(value, "0") ||
+ strcaseeq(value, "no") ||
+ strcaseeq(value, "false") ||
+ strcaseeq(value, "disabled"))
+ {
+ return FALSE;
+ }
+ }
+ return def;
+}
+
+METHOD(settings_t, get_bool, bool,
+ private_settings_t *this, char *key, bool def, ...)
+{
+ char *value;
+ va_list args;
+
+ va_start(args, def);
+ value = find_value(this, this->top, key, args);
+ va_end(args);
+ return settings_value_as_bool(value, def);
+}
+
+/**
+ * Described in header
+ */
+inline int settings_value_as_int(char *value, int def)
+{
+ int intval;
+ if (value)
+ {
+ errno = 0;
+ intval = strtol(value, NULL, 10);
+ if (errno == 0)
+ {
+ return intval;
+ }
+ }
+ return def;
+}
+
+METHOD(settings_t, get_int, int,
+ private_settings_t *this, char *key, int def, ...)
+{
+ char *value;
+ va_list args;
+
+ va_start(args, def);
+ value = find_value(this, this->top, key, args);
+ va_end(args);
+ return settings_value_as_int(value, def);
+}
+
+/**
+ * Described in header
+ */
+inline double settings_value_as_double(char *value, double def)
+{
+ double dval;
+ if (value)
+ {
+ errno = 0;
+ dval = strtod(value, NULL);
+ if (errno == 0)
+ {
+ return dval;
+ }
+ }
+ return def;
+}
+
+METHOD(settings_t, get_double, double,
+ private_settings_t *this, char *key, double def, ...)
+{
+ char *value;
+ va_list args;
+
+ va_start(args, def);
+ value = find_value(this, this->top, key, args);
+ va_end(args);
+ return settings_value_as_double(value, def);
+}
+
+/**
+ * Described in header
+ */
+inline u_int32_t settings_value_as_time(char *value, u_int32_t def)
+{
+ char *endptr;
+ u_int32_t timeval;
+ if (value)
+ {
+ errno = 0;
+ timeval = strtoul(value, &endptr, 10);
+ if (errno == 0)
+ {
+ switch (*endptr)
+ {
+ case 'd': /* time in days */
+ timeval *= 24 * 3600;
+ break;
+ case 'h': /* time in hours */
+ timeval *= 3600;
+ break;
+ case 'm': /* time in minutes */
+ timeval *= 60;
+ break;
+ case 's': /* time in seconds */
+ default:
+ break;
+ }
+ return timeval;
+ }
+ }
+ return def;
+}
+
+METHOD(settings_t, get_time, u_int32_t,
+ private_settings_t *this, char *key, u_int32_t def, ...)
+{
+ char *value;
+ va_list args;
+
+ va_start(args, def);
+ value = find_value(this, this->top, key, args);
+ va_end(args);
+ return settings_value_as_time(value, def);
+}
+
+METHOD(settings_t, set_str, void,
+ private_settings_t *this, char *key, char *value, ...)
+{
+ va_list args;
+ va_start(args, value);
+ set_value(this, this->top, key, args, value);
+ va_end(args);
+}
+
+METHOD(settings_t, set_bool, void,
+ private_settings_t *this, char *key, bool value, ...)
+{
+ va_list args;
+ va_start(args, value);
+ set_value(this, this->top, key, args, value ? "1" : "0");
+ va_end(args);
+}
+
+METHOD(settings_t, set_int, void,
+ private_settings_t *this, char *key, int value, ...)
+{
+ char val[16];
+ va_list args;
+ va_start(args, value);
+ if (snprintf(val, sizeof(val), "%d", value) < sizeof(val))
+ {
+ set_value(this, this->top, key, args, val);
+ }
+ va_end(args);
+}
+
+METHOD(settings_t, set_double, void,
+ private_settings_t *this, char *key, double value, ...)
+{
+ char val[64];
+ va_list args;
+ va_start(args, value);
+ if (snprintf(val, sizeof(val), "%f", value) < sizeof(val))
+ {
+ set_value(this, this->top, key, args, val);
+ }
+ va_end(args);
+}
+
+METHOD(settings_t, set_time, void,
+ private_settings_t *this, char *key, u_int32_t value, ...)
+{
+ char val[16];
+ va_list args;
+ va_start(args, value);
+ if (snprintf(val, sizeof(val), "%u", value) < sizeof(val))
+ {
+ set_value(this, this->top, key, args, val);
+ }
+ va_end(args);
+}
+
+/**
+ * Enumerate section names, not sections
+ */
+static bool section_filter(void *null, section_t **in, char **out)
+{
+ *out = (*in)->name;
+ return TRUE;
+}
+
+METHOD(settings_t, create_section_enumerator, enumerator_t*,
+ private_settings_t *this, char *key, ...)
+{
+ section_t *section;
+ va_list args;
+
+ va_start(args, key);
+ section = find_section(this, this->top, key, args);
+ va_end(args);
+
+ if (!section)
+ {
+ return enumerator_create_empty();
+ }
+ this->lock->read_lock(this->lock);
+ return enumerator_create_filter(
+ section->sections->create_enumerator(section->sections),
+ (void*)section_filter, this->lock, (void*)this->lock->unlock);
+}
+
+/**
+ * Enumerate key and values, not kv_t entries
+ */
+static bool kv_filter(void *null, kv_t **in, char **key,
+ void *none, char **value)
+{
+ *key = (*in)->key;
+ *value = (*in)->value;
+ return TRUE;
+}
+
+METHOD(settings_t, create_key_value_enumerator, enumerator_t*,
+ private_settings_t *this, char *key, ...)
+{
+ section_t *section;
+ va_list args;
+
+ va_start(args, key);
+ section = find_section(this, this->top, key, args);
+ va_end(args);
+
+ if (!section)
+ {
+ return enumerator_create_empty();
+ }
+ this->lock->read_lock(this->lock);
+ return enumerator_create_filter(
+ section->kv->create_enumerator(section->kv),
+ (void*)kv_filter, this->lock, (void*)this->lock->unlock);
+}
+
+/**
+ * parse text, truncate "skip" chars, delimited by term respecting brackets.
+ *
+ * Chars in "skip" are truncated at the beginning and the end of the resulting
+ * token. "term" contains a list of characters to read up to (first match),
+ * while "br" contains bracket counterparts found in "term" to skip.
+ */
+static char parse(char **text, char *skip, char *term, char *br, char **token)
+{
+ char *best = NULL;
+ char best_term = '\0';
+
+ /* skip leading chars */
+ while (strchr(skip, **text))
+ {
+ (*text)++;
+ if (!**text)
+ {
+ return 0;
+ }
+ }
+ /* mark begin of subtext */
+ *token = *text;
+ while (*term)
+ {
+ char *pos = *text;
+ int level = 1;
+
+ /* find terminator */
+ while (*pos)
+ {
+ if (*pos == *term)
+ {
+ level--;
+ }
+ else if (br && *pos == *br)
+ {
+ level++;
+ }
+ if (level == 0)
+ {
+ if (best == NULL || best > pos)
+ {
+ best = pos;
+ best_term = *term;
+ }
+ break;
+ }
+ pos++;
+ }
+ /* try next terminator */
+ term++;
+ if (br)
+ {
+ br++;
+ }
+ }
+ if (best)
+ {
+ /* update input */
+ *text = best;
+ /* null trailing bytes */
+ do
+ {
+ *best = '\0';
+ best--;
+ }
+ while (best >= *token && strchr(skip, *best));
+ /* return found terminator */
+ return best_term;
+ }
+ return 0;
+}
+
+/**
+ * Check if "text" starts with "pattern".
+ * Characters in "skip" are skipped first. If found, TRUE is returned and "text"
+ * is modified to point to the character right after "pattern".
+ */
+static bool starts_with(char **text, char *skip, char *pattern)
+{
+ char *pos = *text;
+ int len = strlen(pattern);
+ while (strchr(skip, *pos))
+ {
+ pos++;
+ if (!*pos)
+ {
+ return FALSE;
+ }
+ }
+ if (strlen(pos) < len || !strneq(pos, pattern, len))
+ {
+ return FALSE;
+ }
+ *text = pos + len;
+ return TRUE;
+}
+
+/**
+ * Check if what follows in "text" is an include statement.
+ * If this function returns TRUE, "text" will point to the character right after
+ * the include pattern, which is returned in "pattern".
+ */
+static bool parse_include(char **text, char **pattern)
+{
+ char *pos = *text;
+ if (!starts_with(&pos, "\n\t ", "include"))
+ {
+ return FALSE;
+ }
+ if (starts_with(&pos, "\t ", "="))
+ { /* ignore "include = value" */
+ return FALSE;
+ }
+ *text = pos;
+ return parse(text, "\t ", "\n", NULL, pattern) != 0;
+}
+
+/**
+ * Forward declaration.
+ */
+static bool parse_files(linked_list_t *contents, char *file, int level,
+ char *pattern, section_t *section);
+
+/**
+ * Parse a section
+ */
+static bool parse_section(linked_list_t *contents, char *file, int level,
+ char **text, section_t *section)
+{
+ bool finished = FALSE;
+ char *key, *value, *inner;
+
+ while (!finished)
+ {
+ if (parse_include(text, &value))
+ {
+ if (!parse_files(contents, file, level, value, section))
+ {
+ DBG1(DBG_LIB, "failed to include '%s'", value);
+ return FALSE;
+ }
+ continue;
+ }
+ switch (parse(text, "\t\n ", "{=#", NULL, &key))
+ {
+ case '{':
+ if (parse(text, "\t ", "}", "{", &inner))
+ {
+ section_t *sub;
+ if (!strlen(key))
+ {
+ DBG1(DBG_LIB, "skipping section without name in '%s'",
+ section->name);
+ continue;
+ }
+ if (section->sections->find_first(section->sections,
+ (linked_list_match_t)section_find,
+ (void**)&sub, key) != SUCCESS)
+ {
+ sub = section_create(key);
+ if (parse_section(contents, file, level, &inner, sub))
+ {
+ section->sections->insert_last(section->sections,
+ sub);
+ continue;
+ }
+ section_destroy(sub);
+ }
+ else
+ { /* extend the existing section */
+ if (parse_section(contents, file, level, &inner, sub))
+ {
+ continue;
+ }
+ }
+ DBG1(DBG_LIB, "parsing subsection '%s' failed", key);
+ break;
+ }
+ DBG1(DBG_LIB, "matching '}' not found near %s", *text);
+ break;
+ case '=':
+ if (parse(text, "\t ", "\n", NULL, &value))
+ {
+ kv_t *kv;
+ if (!strlen(key))
+ {
+ DBG1(DBG_LIB, "skipping value without key in '%s'",
+ section->name);
+ continue;
+ }
+ if (section->kv->find_first(section->kv,
+ (linked_list_match_t)kv_find,
+ (void**)&kv, key) != SUCCESS)
+ {
+ kv = kv_create(key, value);
+ section->kv->insert_last(section->kv, kv);
+ }
+ else
+ { /* replace with the most recently read value */
+ kv->value = value;
+ }
+ continue;
+ }
+ DBG1(DBG_LIB, "parsing value failed near %s", *text);
+ break;
+ case '#':
+ parse(text, "", "\n", NULL, &value);
+ continue;
+ default:
+ finished = TRUE;
+ continue;
+ }
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/**
+ * Parse a file and add the settings to the given section.
+ */
+static bool parse_file(linked_list_t *contents, char *file, int level,
+ section_t *section)
+{
+ bool success;
+ char *text, *pos;
+ struct stat st;
+ FILE *fd;
+ int len;
+
+ DBG2(DBG_LIB, "loading config file '%s'", file);
+ if (stat(file, &st) == -1)
+ {
+ if (errno == ENOENT)
+ {
+ DBG2(DBG_LIB, "'%s' does not exist, ignored", file);
+ return TRUE;
+ }
+ DBG1(DBG_LIB, "failed to stat '%s': %s", file, strerror(errno));
+ return FALSE;
+ }
+ else if (!S_ISREG(st.st_mode))
+ {
+ DBG1(DBG_LIB, "'%s' is not a regular file", file);
+ return FALSE;
+ }
+ fd = fopen(file, "r");
+ if (fd == NULL)
+ {
+ DBG1(DBG_LIB, "'%s' is not readable", file);
+ return FALSE;
+ }
+ fseek(fd, 0, SEEK_END);
+ len = ftell(fd);
+ rewind(fd);
+ text = malloc(len + 1);
+ text[len] = '\0';
+ if (fread(text, 1, len, fd) != len)
+ {
+ free(text);
+ fclose(fd);
+ return FALSE;
+ }
+ fclose(fd);
+
+ pos = text;
+ success = parse_section(contents, file, level, &pos, section);
+ if (!success)
+ {
+ free(text);
+ }
+ else
+ {
+ contents->insert_last(contents, text);
+ }
+ return success;
+}
+
+/**
+ * Load the files matching "pattern", which is resolved with glob(3), if
+ * available.
+ * If the pattern is relative, the directory of "file" is used as base.
+ */
+static bool parse_files(linked_list_t *contents, char *file, int level,
+ char *pattern, section_t *section)
+{
+ bool success = TRUE;
+ char pat[PATH_MAX];
+
+ if (level > MAX_INCLUSION_LEVEL)
+ {
+ DBG1(DBG_LIB, "maximum level of %d includes reached, ignored",
+ MAX_INCLUSION_LEVEL);
+ return TRUE;
+ }
+
+ if (!strlen(pattern))
+ {
+ DBG2(DBG_LIB, "empty include pattern, ignored");
+ return TRUE;
+ }
+
+ if (!file || pattern[0] == '/')
+ { /* absolute path */
+ if (snprintf(pat, sizeof(pat), "%s", pattern) >= sizeof(pat))
+ {
+ DBG1(DBG_LIB, "include pattern too long, ignored");
+ return TRUE;
+ }
+ }
+ else
+ { /* base relative paths to the directory of the current file */
+ char *dir = strdup(file);
+ dir = dirname(dir);
+ if (snprintf(pat, sizeof(pat), "%s/%s", dir, pattern) >= sizeof(pat))
+ {
+ DBG1(DBG_LIB, "include pattern too long, ignored");
+ free(dir);
+ return TRUE;
+ }
+ free(dir);
+ }
+#ifdef HAVE_GLOB_H
+ {
+ int status;
+ glob_t buf;
+
+ status = glob(pat, GLOB_ERR, NULL, &buf);
+ if (status == GLOB_NOMATCH)
+ {
+ DBG2(DBG_LIB, "no files found matching '%s', ignored", pat);
+ }
+ else if (status != 0)
+ {
+ DBG1(DBG_LIB, "expanding file pattern '%s' failed", pat);
+ success = FALSE;
+ }
+ else
+ {
+ char **expanded;
+ for (expanded = buf.gl_pathv; *expanded != NULL; expanded++)
+ {
+ success &= parse_file(contents, *expanded, level + 1, section);
+ if (!success)
+ {
+ break;
+ }
+ }
+ }
+ globfree(&buf);
+ }
+#else /* HAVE_GLOB_H */
+ /* if glob(3) is not available, try to load pattern directly */
+ success = parse_file(contents, pat, level + 1, section);
+#endif /* HAVE_GLOB_H */
+ return success;
+}
+
+/**
+ * Recursivly extends "base" with "extension".
+ */
+static void section_extend(section_t *base, section_t *extension)
+{
+ enumerator_t *enumerator;
+ section_t *sec;
+ kv_t *kv;
+
+ enumerator = extension->sections->create_enumerator(extension->sections);
+ while (enumerator->enumerate(enumerator, (void**)&sec))
+ {
+ section_t *found;
+ if (base->sections->find_first(base->sections,
+ (linked_list_match_t)section_find, (void**)&found,
+ sec->name) == SUCCESS)
+ {
+ section_extend(found, sec);
+ }
+ else
+ {
+ extension->sections->remove_at(extension->sections, enumerator);
+ base->sections->insert_last(base->sections, sec);
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ enumerator = extension->kv->create_enumerator(extension->kv);
+ while (enumerator->enumerate(enumerator, (void**)&kv))
+ {
+ kv_t *found;
+ if (base->kv->find_first(base->kv, (linked_list_match_t)kv_find,
+ (void**)&found, kv->key) == SUCCESS)
+ {
+ found->value = kv->value;
+ }
+ else
+ {
+ extension->kv->remove_at(extension->kv, enumerator);
+ base->kv->insert_last(base->kv, kv);
+ }
+ }
+ enumerator->destroy(enumerator);
+}
+
+/**
+ * Load settings from files matching the given file pattern.
+ * All sections and values are added relative to "parent".
+ * All files (even included ones) have to be loaded successfully.
+ */
+static bool load_files_internal(private_settings_t *this, section_t *parent,
+ char *pattern, bool merge)
+{
+ char *text;
+ linked_list_t *contents;
+ section_t *section;
+
+ if (pattern == NULL)
+ {
+#ifdef STRONGSWAN_CONF
+ pattern = STRONGSWAN_CONF;
+#else
+ return FALSE;
+#endif
+ }
+
+ contents = linked_list_create();
+ section = section_create(NULL);
+
+ if (!parse_files(contents, NULL, 0, pattern, section))
+ {
+ contents->destroy_function(contents, (void*)free);
+ section_destroy(section);
+ return FALSE;
+ }
+
+ this->lock->write_lock(this->lock);
+ if (!merge)
+ {
+ section_purge(parent);
+ }
+ /* extend parent section */
+ section_extend(parent, section);
+ /* move contents of loaded files to main store */
+ while (contents->remove_first(contents, (void**)&text) == SUCCESS)
+ {
+ this->contents->insert_last(this->contents, text);
+ }
+ this->lock->unlock(this->lock);
+
+ section_destroy(section);
+ contents->destroy(contents);
+ return TRUE;
+}
+
+METHOD(settings_t, load_files, bool,
+ private_settings_t *this, char *pattern, bool merge)
+{
+ return load_files_internal(this, this->top, pattern, merge);
+}
+
+METHOD(settings_t, load_files_section, bool,
+ private_settings_t *this, char *pattern, bool merge, char *key, ...)
+{
+ section_t *section;
+ va_list args;
+
+ va_start(args, key);
+ section = ensure_section(this, this->top, key, args);
+ va_end(args);
+
+ if (!section)
+ {
+ return FALSE;
+ }
+ return load_files_internal(this, section, pattern, merge);
+}
+
+METHOD(settings_t, destroy, void,
+ private_settings_t *this)
+{
+ section_destroy(this->top);
+ this->contents->destroy_function(this->contents, (void*)free);
+ this->lock->destroy(this->lock);
+ free(this);
+}
+
+/*
+ * see header file
+ */
+settings_t *settings_create(char *file)
+{
+ private_settings_t *this;
+
+ INIT(this,
+ .public = {
+ .get_str = _get_str,
+ .get_int = _get_int,
+ .get_double = _get_double,
+ .get_time = _get_time,
+ .get_bool = _get_bool,
+ .set_str = _set_str,
+ .set_int = _set_int,
+ .set_double = _set_double,
+ .set_time = _set_time,
+ .set_bool = _set_bool,
+ .create_section_enumerator = _create_section_enumerator,
+ .create_key_value_enumerator = _create_key_value_enumerator,
+ .load_files = _load_files,
+ .load_files_section = _load_files_section,
+ .destroy = _destroy,
+ },
+ .top = section_create(NULL),
+ .contents = linked_list_create(),
+ .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+ );
+
+ load_files(this, file, FALSE);
+
+ return &this->public;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 13:31:46 +0000