diff options
Diffstat (limited to 'src/libcharon/sa/ikev1/tasks/informational.c')
| -rw-r--r-- | src/libcharon/sa/ikev1/tasks/informational.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/libcharon/sa/ikev1/tasks/informational.c b/src/libcharon/sa/ikev1/tasks/informational.c new file mode 100644 index 000000000..bda1d2afb --- /dev/null +++ b/src/libcharon/sa/ikev1/tasks/informational.c @@ -0,0 +1,253 @@ +/* + * Copyright (C) 2011 Martin Willi + * Copyright (C) 2011 revosec AG + * + * 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 "informational.h" + +#include <daemon.h> +#include <sa/ikev1/tasks/isakmp_delete.h> +#include <sa/ikev1/tasks/quick_delete.h> + +#include <encoding/payloads/delete_payload.h> + +typedef struct private_informational_t private_informational_t; + +/** + * Private members of a informational_t task. + */ +struct private_informational_t { + + /** + * Public methods and task_t interface. + */ + informational_t public; + + /** + * Assigned IKE_SA. + */ + ike_sa_t *ike_sa; + + /** + * Notify payload to send + */ + notify_payload_t *notify; + + /** + * Delete subtask + */ + task_t *del; +}; + +/** + * Cancel active quick mode after receiving an error + */ +static void cancel_quick_mode(private_informational_t *this) +{ + enumerator_t *enumerator; + task_t *task; + + enumerator = this->ike_sa->create_task_enumerator(this->ike_sa, + TASK_QUEUE_ACTIVE); + while (enumerator->enumerate(enumerator, &task)) + { + if (task->get_type(task) == TASK_QUICK_MODE) + { + this->ike_sa->flush_queue(this->ike_sa, TASK_QUEUE_ACTIVE); + break; + } + } + enumerator->destroy(enumerator); +} + +METHOD(task_t, build_i, status_t, + private_informational_t *this, message_t *message) +{ + message->add_payload(message, &this->notify->payload_interface); + this->notify = NULL; + return SUCCESS; +} + +METHOD(task_t, process_r, status_t, + private_informational_t *this, message_t *message) +{ + enumerator_t *enumerator; + delete_payload_t *delete; + notify_payload_t *notify; + notify_type_t type; + payload_t *payload; + status_t status = SUCCESS; + + enumerator = message->create_payload_enumerator(message); + while (enumerator->enumerate(enumerator, &payload)) + { + switch (payload->get_type(payload)) + { + case NOTIFY_V1: + notify = (notify_payload_t*)payload; + type = notify->get_notify_type(notify); + + if (type == INITIAL_CONTACT_IKEV1) + { + this->ike_sa->set_condition(this->ike_sa, + COND_INIT_CONTACT_SEEN, TRUE); + } + else if (type == UNITY_LOAD_BALANCE) + { + host_t *redirect, *me; + chunk_t data; + + data = notify->get_notification_data(notify); + redirect = host_create_from_chunk(AF_INET, data, + IKEV2_UDP_PORT); + if (redirect) + { /* treat the redirect as reauthentication */ + DBG1(DBG_IKE, "received %N notify. redirected to %H", + notify_type_names, type, redirect); + /* Cisco boxes reject the first message from 4500 */ + me = this->ike_sa->get_my_host(this->ike_sa); + me->set_port(me, charon->socket->get_port( + charon->socket, FALSE)); + this->ike_sa->set_other_host(this->ike_sa, redirect); + this->ike_sa->reauth(this->ike_sa); + enumerator->destroy(enumerator); + return DESTROY_ME; + } + else + { + DBG1(DBG_IKE, "received %N notify, invalid address"); + } + } + else if (type < 16384) + { + DBG1(DBG_IKE, "received %N error notify", + notify_type_names, type); + if (this->ike_sa->get_state(this->ike_sa) == IKE_CONNECTING) + { /* only critical during main mode */ + status = FAILED; + } + switch (type) + { + case INVALID_ID_INFORMATION: + case NO_PROPOSAL_CHOSEN: + cancel_quick_mode(this); + break; + default: + break; + } + break; + } + else + { + DBG1(DBG_IKE, "received %N notify", + notify_type_names, type); + } + continue; + case DELETE_V1: + if (!this->del) + { + delete = (delete_payload_t*)payload; + if (delete->get_protocol_id(delete) == PROTO_IKE) + { + this->del = (task_t*)isakmp_delete_create(this->ike_sa, + FALSE); + } + else + { + this->del = (task_t*)quick_delete_create(this->ike_sa, + PROTO_NONE, 0, FALSE, FALSE); + } + } + break; + default: + continue; + } + break; + } + enumerator->destroy(enumerator); + + if (this->del && status == SUCCESS) + { + return this->del->process(this->del, message); + } + return status; +} + +METHOD(task_t, build_r, status_t, + private_informational_t *this, message_t *message) +{ + if (this->del) + { + return this->del->build(this->del, message); + } + return FAILED; +} + +METHOD(task_t, process_i, status_t, + private_informational_t *this, message_t *message) +{ + return FAILED; +} + +METHOD(task_t, get_type, task_type_t, + private_informational_t *this) +{ + return TASK_INFORMATIONAL; +} + +METHOD(task_t, migrate, void, + private_informational_t *this, ike_sa_t *ike_sa) +{ + this->ike_sa = ike_sa; +} + +METHOD(task_t, destroy, void, + private_informational_t *this) +{ + DESTROY_IF(this->notify); + DESTROY_IF(this->del); + free(this); +} + +/* + * Described in header. + */ +informational_t *informational_create(ike_sa_t *ike_sa, notify_payload_t *notify) +{ + private_informational_t *this; + + INIT(this, + .public = { + .task = { + .get_type = _get_type, + .migrate = _migrate, + .destroy = _destroy, + }, + }, + .ike_sa = ike_sa, + .notify = notify, + ); + + if (notify) + { + this->public.task.build = _build_i; + this->public.task.process = _process_i; + } + else + { + this->public.task.build = _build_r; + this->public.task.process = _process_r; + } + + return &this->public; +} |