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/*
* 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>
#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;
};
struct attribute_entry_t {
/** type of attribute */
configuration_attribute_type_t type;
/** attribute value */
chunk_t value;
};
/**
* 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;
}
/**
* Implementation of attribute_provider_t.create_attribute_enumerator
*/
static enumerator_t* create_attribute_enumerator(private_attr_provider_t *this,
identification_t *id, host_t *vip)
{
if (vip)
{
return enumerator_create_filter(
this->attributes->create_enumerator(this->attributes),
(void*)attr_enum_filter, NULL, NULL);
}
return enumerator_create_empty();
}
/**
* Implementation of attr_provider_t.destroy
*/
static void destroy(private_attr_provider_t *this)
{
attribute_entry_t *entry;
while (this->attributes->remove_last(this->attributes,
(void**)&entry) == SUCCESS)
{
free(entry->value.ptr);
free(entry);
}
this->attributes->destroy(this->attributes);
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, "charon.%s%d", NULL, 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);
this->attributes->insert_last(this->attributes, entry);
}
}
}
/**
* Key to attribute type mappings, for v4 and v6 attributes
*/
static struct {
char *name;
configuration_attribute_type_t v4;
configuration_attribute_type_t v6;
} 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},
};
/**
* 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;
enumerator = lib->settings->create_key_value_enumerator(lib->settings,
"charon.plugins.attr");
while (enumerator->enumerate(enumerator, &key, &value))
{
configuration_attribute_type_t type;
attribute_entry_t *entry;
host_t *host;
int i;
type = atoi(key);
tokens = enumerator_create_token(value, ",", " ");
while (tokens->enumerate(tokens, &token))
{
host = host_create_from_string(token, 0);
if (!host)
{
DBG1(DBG_CFG, "invalid host in key %s: %s", key, token);
continue;
}
if (!type)
{
for (i = 0; i < countof(keys); i++)
{
if (streq(key, keys[i].name))
{
if (host->get_family(host) == AF_INET)
{
type = keys[i].v4;
}
else
{
type = keys[i].v6;
}
}
}
if (!type)
{
DBG1(DBG_CFG, "mapping attribute type %s failed", key);
break;
}
}
entry = malloc_thing(attribute_entry_t);
entry->type = type;
entry->value = chunk_clone(host->get_address(host));
host->destroy(host);
this->attributes->insert_last(this->attributes, entry);
}
tokens->destroy(tokens);
}
enumerator->destroy(enumerator);
}
/*
* see header file
*/
attr_provider_t *attr_provider_create(database_t *db)
{
private_attr_provider_t *this;
int i;
this = malloc_thing(private_attr_provider_t);
this->public.provider.acquire_address = (host_t*(*)(attribute_provider_t *this, char*, identification_t *, host_t *))return_null;
this->public.provider.release_address = (bool(*)(attribute_provider_t *this, char*,host_t *, identification_t*))return_false;
this->public.provider.create_attribute_enumerator = (enumerator_t*(*)(attribute_provider_t*, identification_t *id, host_t *vip))create_attribute_enumerator;
this->public.destroy = (void(*)(attr_provider_t*))destroy;
this->attributes = linked_list_create();
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);
}
load_entries(this);
return &this->public;
}
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