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Diffstat (limited to 'src/charon/sa/tasks/ike_config.c')
-rw-r--r--src/charon/sa/tasks/ike_config.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/src/charon/sa/tasks/ike_config.c b/src/charon/sa/tasks/ike_config.c
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index 000000000..ce29b9220
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+++ b/src/charon/sa/tasks/ike_config.c
@@ -0,0 +1,428 @@
+/**
+ * @file ike_config.c
+ *
+ * @brief Implementation of the ike_config task.
+ *
+ */
+
+/*
+ * 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.
+ */
+
+#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;
+
+ /**
+ * associated policy with virtual IP configuration
+ */
+ policy_t *policy;
+
+ /**
+ * 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))
+ {
+ this->virtual_ip = this->policy->get_virtual_ip(this->policy, NULL);
+
+ 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)
+ {
+ this->policy = this->ike_sa->get_policy(this->ike_sa);
+
+ if (this->policy && this->virtual_ip)
+ {
+ host_t *ip;
+
+ DBG1(DBG_IKE, "peer requested virtual IP %H", this->virtual_ip);
+ ip = this->policy->get_virtual_ip(this->policy, this->virtual_ip);
+ if (ip == NULL || ip->is_anyaddr(ip))
+ {
+ 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;
+
+ /* DNS testing values
+ if (this->dns->remove_last(this->dns, (void**)&ip) == SUCCESS)
+ {
+ ip->destroy(ip);
+ ip = host_create_from_string("10.3.0.1", 0);
+ this->dns->insert_last(this->dns, ip);
+ ip = host_create_from_string("10.3.0.2", 0);
+ this->dns->insert_last(this->dns, 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;
+
+ DESTROY_IF(this->virtual_ip);
+ this->virtual_ip = NULL;
+
+ process_payloads(this, message);
+
+ if (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, policy_t *policy)
+{
+ 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 (policy)
+ {
+ this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
+ this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
+ this->initiator = TRUE;
+ }
+ 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 = FALSE;
+ }
+
+ this->ike_sa = ike_sa;
+ this->policy = policy;
+ this->virtual_ip = NULL;
+ this->dns = linked_list_create();
+
+ return &this->public;
+}
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