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Diffstat (limited to 'src/libcharon/plugins/attr/attr_provider.c')
-rw-r--r--src/libcharon/plugins/attr/attr_provider.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/src/libcharon/plugins/attr/attr_provider.c b/src/libcharon/plugins/attr/attr_provider.c
new file mode 100644
index 000000000..cac0ae4bf
--- /dev/null
+++ b/src/libcharon/plugins/attr/attr_provider.c
@@ -0,0 +1,329 @@
+/*
+ * Copyright (C) 2010 Tobias Brunner
+ * Copyright (C) 2009 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.
+ */
+
+#include "attr_provider.h"
+
+#include <time.h>
+
+#include <daemon.h>
+#include <utils/debug.h>
+#include <collections/linked_list.h>
+#include <threading/rwlock.h>
+
+#define SERVER_MAX 2
+
+typedef struct private_attr_provider_t private_attr_provider_t;
+typedef struct attribute_entry_t attribute_entry_t;
+
+/**
+ * private data of attr_provider
+ */
+struct private_attr_provider_t {
+
+ /**
+ * public functions
+ */
+ attr_provider_t public;
+
+ /**
+ * List of attributes, attribute_entry_t
+ */
+ linked_list_t *attributes;
+
+ /**
+ * Lock for attribute list
+ */
+ rwlock_t *lock;
+};
+
+struct attribute_entry_t {
+ /** type of attribute */
+ configuration_attribute_type_t type;
+ /** attribute value */
+ chunk_t value;
+};
+
+/**
+ * Destroy an entry
+ */
+static void attribute_destroy(attribute_entry_t *this)
+{
+ free(this->value.ptr);
+ free(this);
+}
+
+/**
+ * convert enumerator value from attribute_entry
+ */
+static bool attr_enum_filter(void *null, attribute_entry_t **in,
+ configuration_attribute_type_t *type, void* none, chunk_t *value)
+{
+ *type = (*in)->type;
+ *value = (*in)->value;
+ return TRUE;
+}
+
+METHOD(attribute_provider_t, create_attribute_enumerator, enumerator_t*,
+ private_attr_provider_t *this, linked_list_t *pools,
+ ike_sa_t *ike_sa, linked_list_t *vips)
+{
+ if (vips->get_count(vips))
+ {
+ this->lock->read_lock(this->lock);
+ return enumerator_create_filter(
+ this->attributes->create_enumerator(this->attributes),
+ (void*)attr_enum_filter, this->lock, (void*)this->lock->unlock);
+ }
+ return enumerator_create_empty();
+}
+
+METHOD(attr_provider_t, destroy, void,
+ private_attr_provider_t *this)
+{
+ this->attributes->destroy_function(this->attributes,
+ (void*)attribute_destroy);
+ this->lock->destroy(this->lock);
+ free(this);
+}
+
+/**
+ * Add an attribute entry to the list
+ */
+static void add_legacy_entry(private_attr_provider_t *this, char *key, int nr,
+ configuration_attribute_type_t type)
+{
+ attribute_entry_t *entry;
+ host_t *host;
+ char *str;
+
+ str = lib->settings->get_str(lib->settings, "%s.%s%d", NULL, lib->ns,
+ key, nr);
+ if (str)
+ {
+ host = host_create_from_string(str, 0);
+ if (host)
+ {
+ entry = malloc_thing(attribute_entry_t);
+
+ if (host->get_family(host) == AF_INET6)
+ {
+ switch (type)
+ {
+ case INTERNAL_IP4_DNS:
+ type = INTERNAL_IP6_DNS;
+ break;
+ case INTERNAL_IP4_NBNS:
+ type = INTERNAL_IP6_NBNS;
+ break;
+ default:
+ break;
+ }
+ }
+ entry->type = type;
+ entry->value = chunk_clone(host->get_address(host));
+ host->destroy(host);
+ DBG2(DBG_CFG, "loaded legacy entry attribute %N: %#B",
+ configuration_attribute_type_names, entry->type, &entry->value);
+ this->attributes->insert_last(this->attributes, entry);
+ }
+ }
+}
+
+/**
+ * Key to attribute type mappings, for v4 and v6 attributes
+ */
+typedef struct {
+ char *name;
+ configuration_attribute_type_t v4;
+ configuration_attribute_type_t v6;
+} attribute_type_key_t;
+
+static attribute_type_key_t keys[] = {
+ {"address", INTERNAL_IP4_ADDRESS, INTERNAL_IP6_ADDRESS},
+ {"dns", INTERNAL_IP4_DNS, INTERNAL_IP6_DNS},
+ {"nbns", INTERNAL_IP4_NBNS, INTERNAL_IP6_NBNS},
+ {"dhcp", INTERNAL_IP4_DHCP, INTERNAL_IP6_DHCP},
+ {"netmask", INTERNAL_IP4_NETMASK, INTERNAL_IP6_NETMASK},
+ {"server", INTERNAL_IP4_SERVER, INTERNAL_IP6_SERVER},
+ {"subnet", INTERNAL_IP4_SUBNET, INTERNAL_IP6_SUBNET},
+ {"split-include", UNITY_SPLIT_INCLUDE, UNITY_SPLIT_INCLUDE},
+ {"split-exclude", UNITY_LOCAL_LAN, UNITY_LOCAL_LAN},
+};
+
+/**
+ * Load (numerical) entries from the plugins.attr namespace
+ */
+static void load_entries(private_attr_provider_t *this)
+{
+ enumerator_t *enumerator, *tokens;
+ char *key, *value, *token;
+ int i;
+
+ for (i = 1; i <= SERVER_MAX; i++)
+ {
+ add_legacy_entry(this, "dns", i, INTERNAL_IP4_DNS);
+ add_legacy_entry(this, "nbns", i, INTERNAL_IP4_NBNS);
+ }
+
+ enumerator = lib->settings->create_key_value_enumerator(lib->settings,
+ "%s.plugins.attr", lib->ns);
+ while (enumerator->enumerate(enumerator, &key, &value))
+ {
+ configuration_attribute_type_t type;
+ attribute_type_key_t *mapped = NULL;
+ attribute_entry_t *entry;
+ chunk_t data;
+ host_t *host;
+ char *pos;
+ int i, mask = -1, family;
+
+ if (streq(key, "load"))
+ {
+ continue;
+ }
+ type = atoi(key);
+ if (!type)
+ {
+ for (i = 0; i < countof(keys); i++)
+ {
+ if (streq(key, keys[i].name))
+ {
+ mapped = &keys[i];
+ break;
+ }
+ }
+ if (!mapped)
+ {
+ DBG1(DBG_CFG, "mapping attribute type %s failed", key);
+ continue;
+ }
+ }
+ tokens = enumerator_create_token(value, ",", " ");
+ while (tokens->enumerate(tokens, &token))
+ {
+ pos = strchr(token, '/');
+ if (pos)
+ {
+ *(pos++) = '\0';
+ mask = atoi(pos);
+ }
+ host = host_create_from_string(token, 0);
+ if (!host)
+ {
+ if (mapped)
+ {
+ DBG1(DBG_CFG, "invalid host in key %s: %s", key, token);
+ continue;
+ }
+ /* store numeric attributes that are no IP addresses as strings */
+ data = chunk_clone(chunk_from_str(token));
+ }
+ else
+ {
+ family = host->get_family(host);
+ if (mask == -1)
+ {
+ data = chunk_clone(host->get_address(host));
+ }
+ else
+ {
+ if (family == AF_INET)
+ { /* IPv4 attributes contain a subnet mask */
+ u_int32_t netmask = 0;
+
+ if (mask)
+ { /* shifting u_int32_t by 32 or more is undefined */
+ mask = 32 - mask;
+ netmask = htonl((0xFFFFFFFF >> mask) << mask);
+ }
+ data = chunk_cat("cc", host->get_address(host),
+ chunk_from_thing(netmask));
+ }
+ else
+ { /* IPv6 addresses the prefix only */
+ data = chunk_cat("cc", host->get_address(host),
+ chunk_from_chars(mask));
+ }
+ }
+ host->destroy(host);
+ if (mapped)
+ {
+ switch (family)
+ {
+ case AF_INET:
+ type = mapped->v4;
+ break;
+ case AF_INET6:
+ type = mapped->v6;
+ break;
+ }
+ }
+ }
+ INIT(entry,
+ .type = type,
+ .value = data,
+ );
+ DBG2(DBG_CFG, "loaded attribute %N: %#B",
+ configuration_attribute_type_names, entry->type, &entry->value);
+ this->attributes->insert_last(this->attributes, entry);
+ }
+ tokens->destroy(tokens);
+ }
+ enumerator->destroy(enumerator);
+}
+
+METHOD(attr_provider_t, reload, void,
+ private_attr_provider_t *this)
+{
+ this->lock->write_lock(this->lock);
+
+ this->attributes->destroy_function(this->attributes, (void*)attribute_destroy);
+ this->attributes = linked_list_create();
+
+ load_entries(this);
+
+ DBG1(DBG_CFG, "loaded %d entr%s for attr plugin configuration",
+ this->attributes->get_count(this->attributes),
+ this->attributes->get_count(this->attributes) == 1 ? "y" : "ies");
+
+ this->lock->unlock(this->lock);
+}
+
+/*
+ * see header file
+ */
+attr_provider_t *attr_provider_create(database_t *db)
+{
+ private_attr_provider_t *this;
+
+ INIT(this,
+ .public = {
+ .provider = {
+ .acquire_address = (void*)return_null,
+ .release_address = (void*)return_false,
+ .create_attribute_enumerator = _create_attribute_enumerator,
+ },
+ .reload = _reload,
+ .destroy = _destroy,
+ },
+ .attributes = linked_list_create(),
+ .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+ );
+
+ load_entries(this);
+
+ return &this->public;
+}
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