437 lines
9.6 KiB
C
437 lines
9.6 KiB
C
/*
|
|
* Copyright (C) 2007 Martin Willi
|
|
* Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include "ike_config.h"
|
|
|
|
#include <daemon.h>
|
|
#include <encoding/payloads/cp_payload.h>
|
|
|
|
typedef struct private_ike_config_t private_ike_config_t;
|
|
|
|
/**
|
|
* Private members of a ike_config_t task.
|
|
*/
|
|
struct private_ike_config_t {
|
|
|
|
/**
|
|
* Public methods and task_t interface.
|
|
*/
|
|
ike_config_t public;
|
|
|
|
/**
|
|
* Assigned IKE_SA.
|
|
*/
|
|
ike_sa_t *ike_sa;
|
|
|
|
/**
|
|
* Are we the initiator?
|
|
*/
|
|
bool initiator;
|
|
|
|
/**
|
|
* virtual ip
|
|
*/
|
|
host_t *virtual_ip;
|
|
|
|
/**
|
|
* list of DNS servers
|
|
*/
|
|
linked_list_t *dns;
|
|
};
|
|
|
|
/**
|
|
* build configuration payloads and attributes
|
|
*/
|
|
static void build_payloads(private_ike_config_t *this, message_t *message,
|
|
config_type_t type)
|
|
{
|
|
cp_payload_t *cp;
|
|
configuration_attribute_t *ca;
|
|
chunk_t chunk, prefix;
|
|
|
|
if (!this->virtual_ip)
|
|
{
|
|
return;
|
|
}
|
|
|
|
cp = cp_payload_create();
|
|
cp->set_config_type(cp, type);
|
|
|
|
ca = configuration_attribute_create();
|
|
|
|
if (this->virtual_ip->get_family(this->virtual_ip) == AF_INET)
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP4_ADDRESS);
|
|
if (this->virtual_ip->is_anyaddr(this->virtual_ip))
|
|
{
|
|
chunk = chunk_empty;
|
|
}
|
|
else
|
|
{
|
|
chunk = this->virtual_ip->get_address(this->virtual_ip);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP6_ADDRESS);
|
|
if (this->virtual_ip->is_anyaddr(this->virtual_ip))
|
|
{
|
|
chunk = chunk_empty;
|
|
}
|
|
else
|
|
{
|
|
prefix = chunk_alloca(1);
|
|
*prefix.ptr = 64;
|
|
chunk = this->virtual_ip->get_address(this->virtual_ip);
|
|
chunk = chunk_cata("cc", chunk, prefix);
|
|
}
|
|
}
|
|
ca->set_value(ca, chunk);
|
|
cp->add_configuration_attribute(cp, ca);
|
|
|
|
/* we currently always add a DNS request if we request an IP */
|
|
if (this->initiator)
|
|
{
|
|
ca = configuration_attribute_create();
|
|
if (this->virtual_ip->get_family(this->virtual_ip) == AF_INET)
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP4_DNS);
|
|
}
|
|
else
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP6_DNS);
|
|
}
|
|
cp->add_configuration_attribute(cp, ca);
|
|
}
|
|
else
|
|
{
|
|
host_t *ip;
|
|
iterator_t *iterator = this->dns->create_iterator(this->dns, TRUE);
|
|
while (iterator->iterate(iterator, (void**)&ip))
|
|
{
|
|
ca = configuration_attribute_create();
|
|
if (ip->get_family(ip) == AF_INET)
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP4_DNS);
|
|
}
|
|
else
|
|
{
|
|
ca->set_type(ca, INTERNAL_IP6_DNS);
|
|
}
|
|
chunk = ip->get_address(ip);
|
|
ca->set_value(ca, chunk);
|
|
cp->add_configuration_attribute(cp, ca);
|
|
}
|
|
iterator->destroy(iterator);
|
|
}
|
|
message->add_payload(message, (payload_t*)cp);
|
|
}
|
|
|
|
/**
|
|
* process a single configuration attribute
|
|
*/
|
|
static void process_attribute(private_ike_config_t *this,
|
|
configuration_attribute_t *ca)
|
|
{
|
|
host_t *ip;
|
|
chunk_t addr;
|
|
int family = AF_INET6;
|
|
|
|
switch (ca->get_type(ca))
|
|
{
|
|
case INTERNAL_IP4_ADDRESS:
|
|
family = AF_INET;
|
|
/* fall */
|
|
case INTERNAL_IP6_ADDRESS:
|
|
{
|
|
addr = ca->get_value(ca);
|
|
if (addr.len == 0)
|
|
{
|
|
ip = host_create_any(family);
|
|
}
|
|
else
|
|
{
|
|
/* skip prefix byte in IPv6 payload*/
|
|
if (family == AF_INET6)
|
|
{
|
|
addr.len--;
|
|
}
|
|
ip = host_create_from_chunk(family, addr, 0);
|
|
}
|
|
if (ip && !this->virtual_ip)
|
|
{
|
|
this->virtual_ip = ip;
|
|
}
|
|
break;
|
|
}
|
|
case INTERNAL_IP4_DNS:
|
|
family = AF_INET;
|
|
/* fall */
|
|
case INTERNAL_IP6_DNS:
|
|
{
|
|
addr = ca->get_value(ca);
|
|
if (addr.len == 0)
|
|
{
|
|
ip = host_create_any(family);
|
|
}
|
|
else
|
|
{
|
|
ip = host_create_from_chunk(family, addr, 0);
|
|
}
|
|
if (ip)
|
|
{
|
|
this->dns->insert_last(this->dns, ip);
|
|
}
|
|
break;
|
|
}
|
|
case INTERNAL_IP4_NBNS:
|
|
case INTERNAL_IP6_NBNS:
|
|
/* TODO */
|
|
default:
|
|
DBG1(DBG_IKE, "ignoring %N config attribute",
|
|
configuration_attribute_type_names,
|
|
ca->get_type(ca));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scan for configuration payloads and attributes
|
|
*/
|
|
static void process_payloads(private_ike_config_t *this, message_t *message)
|
|
{
|
|
iterator_t *iterator, *attributes;
|
|
payload_t *payload;
|
|
|
|
iterator = message->get_payload_iterator(message);
|
|
while (iterator->iterate(iterator, (void**)&payload))
|
|
{
|
|
if (payload->get_type(payload) == CONFIGURATION)
|
|
{
|
|
cp_payload_t *cp = (cp_payload_t*)payload;
|
|
configuration_attribute_t *ca;
|
|
switch (cp->get_config_type(cp))
|
|
{
|
|
case CFG_REQUEST:
|
|
case CFG_REPLY:
|
|
{
|
|
attributes = cp->create_attribute_iterator(cp);
|
|
while (attributes->iterate(attributes, (void**)&ca))
|
|
{
|
|
process_attribute(this, ca);
|
|
}
|
|
attributes->destroy(attributes);
|
|
break;
|
|
}
|
|
default:
|
|
DBG1(DBG_IKE, "ignoring %N config payload",
|
|
config_type_names, cp->get_config_type(cp));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
iterator->destroy(iterator);
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.process for initiator
|
|
*/
|
|
static status_t build_i(private_ike_config_t *this, message_t *message)
|
|
{
|
|
if (message->get_exchange_type(message) == IKE_AUTH &&
|
|
message->get_payload(message, ID_INITIATOR))
|
|
{
|
|
peer_cfg_t *config;
|
|
host_t *vip;
|
|
|
|
/* reuse virtual IP if we already have one */
|
|
vip = this->ike_sa->get_virtual_ip(this->ike_sa, TRUE);
|
|
if (!vip)
|
|
{
|
|
config = this->ike_sa->get_peer_cfg(this->ike_sa);
|
|
vip = config->get_virtual_ip(config);
|
|
}
|
|
if (vip)
|
|
{
|
|
this->virtual_ip = vip->clone(vip);
|
|
}
|
|
|
|
build_payloads(this, message, CFG_REQUEST);
|
|
}
|
|
|
|
return NEED_MORE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.process for responder
|
|
*/
|
|
static status_t process_r(private_ike_config_t *this, message_t *message)
|
|
{
|
|
if (message->get_exchange_type(message) == IKE_AUTH &&
|
|
message->get_payload(message, ID_INITIATOR))
|
|
{
|
|
process_payloads(this, message);
|
|
}
|
|
return NEED_MORE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.build for responder
|
|
*/
|
|
static status_t build_r(private_ike_config_t *this, message_t *message)
|
|
{
|
|
if (message->get_exchange_type(message) == IKE_AUTH &&
|
|
message->get_payload(message, EXTENSIBLE_AUTHENTICATION) == NULL)
|
|
{
|
|
peer_cfg_t *config = this->ike_sa->get_peer_cfg(this->ike_sa);
|
|
|
|
if (config && this->virtual_ip)
|
|
{
|
|
host_t *ip = NULL;
|
|
|
|
DBG1(DBG_IKE, "peer requested virtual IP %H", this->virtual_ip);
|
|
if (config->get_pool(config))
|
|
{
|
|
ip = charon->attributes->acquire_address(charon->attributes,
|
|
config->get_pool(config),
|
|
this->ike_sa->get_other_id(this->ike_sa),
|
|
this->ike_sa->get_other_auth(this->ike_sa),
|
|
this->virtual_ip);
|
|
}
|
|
if (ip == NULL)
|
|
{
|
|
DBG1(DBG_IKE, "not assigning a virtual IP to peer");
|
|
return SUCCESS;
|
|
}
|
|
DBG1(DBG_IKE, "assigning virtual IP %H to peer", ip);
|
|
this->ike_sa->set_virtual_ip(this->ike_sa, FALSE, ip);
|
|
|
|
this->virtual_ip->destroy(this->virtual_ip);
|
|
this->virtual_ip = ip;
|
|
|
|
build_payloads(this, message, CFG_REPLY);
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
return NEED_MORE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.process for initiator
|
|
*/
|
|
static status_t process_i(private_ike_config_t *this, message_t *message)
|
|
{
|
|
if (message->get_exchange_type(message) == IKE_AUTH &&
|
|
!message->get_payload(message, EXTENSIBLE_AUTHENTICATION))
|
|
{
|
|
host_t *ip;
|
|
peer_cfg_t *config;
|
|
|
|
DESTROY_IF(this->virtual_ip);
|
|
this->virtual_ip = NULL;
|
|
|
|
process_payloads(this, message);
|
|
|
|
if (this->virtual_ip == NULL)
|
|
{ /* force a configured virtual IP, even server didn't return one */
|
|
config = this->ike_sa->get_peer_cfg(this->ike_sa);
|
|
this->virtual_ip = config->get_virtual_ip(config);
|
|
if (this->virtual_ip)
|
|
{
|
|
this->virtual_ip = this->virtual_ip->clone(this->virtual_ip);
|
|
}
|
|
}
|
|
|
|
if (this->virtual_ip && !this->virtual_ip->is_anyaddr(this->virtual_ip))
|
|
{
|
|
this->ike_sa->set_virtual_ip(this->ike_sa, TRUE, this->virtual_ip);
|
|
|
|
while (this->dns->remove_last(this->dns, (void**)&ip) == SUCCESS)
|
|
{
|
|
if (!ip->is_anyaddr(ip))
|
|
{
|
|
this->ike_sa->add_dns_server(this->ike_sa, ip);
|
|
}
|
|
ip->destroy(ip);
|
|
}
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
return NEED_MORE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.get_type
|
|
*/
|
|
static task_type_t get_type(private_ike_config_t *this)
|
|
{
|
|
return IKE_CONFIG;
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.migrate
|
|
*/
|
|
static void migrate(private_ike_config_t *this, ike_sa_t *ike_sa)
|
|
{
|
|
DESTROY_IF(this->virtual_ip);
|
|
this->dns->destroy_offset(this->dns, offsetof(host_t, destroy));
|
|
|
|
this->ike_sa = ike_sa;
|
|
this->virtual_ip = NULL;
|
|
this->dns = linked_list_create();
|
|
}
|
|
|
|
/**
|
|
* Implementation of task_t.destroy
|
|
*/
|
|
static void destroy(private_ike_config_t *this)
|
|
{
|
|
DESTROY_IF(this->virtual_ip);
|
|
this->dns->destroy_offset(this->dns, offsetof(host_t, destroy));
|
|
free(this);
|
|
}
|
|
|
|
/*
|
|
* Described in header.
|
|
*/
|
|
ike_config_t *ike_config_create(ike_sa_t *ike_sa, bool initiator)
|
|
{
|
|
private_ike_config_t *this = malloc_thing(private_ike_config_t);
|
|
|
|
this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
|
|
this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
|
|
this->public.task.destroy = (void(*)(task_t*))destroy;
|
|
|
|
if (initiator)
|
|
{
|
|
this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
|
|
this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
|
|
}
|
|
else
|
|
{
|
|
this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
|
|
this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
|
|
}
|
|
this->initiator = initiator;
|
|
this->ike_sa = ike_sa;
|
|
this->virtual_ip = NULL;
|
|
this->dns = linked_list_create();
|
|
|
|
return &this->public;
|
|
}
|