diff options
Diffstat (limited to 'src/libcharon/sa/tasks/ike_delete.c')
| -rw-r--r-- | src/libcharon/sa/tasks/ike_delete.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/libcharon/sa/tasks/ike_delete.c b/src/libcharon/sa/tasks/ike_delete.c new file mode 100644 index 000000000..130948836 --- /dev/null +++ b/src/libcharon/sa/tasks/ike_delete.c @@ -0,0 +1,210 @@ +/* + * Copyright (C) 2006-2007 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 "ike_delete.h" + +#include <daemon.h> +#include <encoding/payloads/delete_payload.h> + + +typedef struct private_ike_delete_t private_ike_delete_t; + +/** + * Private members of a ike_delete_t task. + */ +struct private_ike_delete_t { + + /** + * Public methods and task_t interface. + */ + ike_delete_t public; + + /** + * Assigned IKE_SA. + */ + ike_sa_t *ike_sa; + + /** + * Are we the initiator? + */ + bool initiator; + + /** + * are we deleting a rekeyed SA? + */ + bool rekeyed; + + /** + * are we responding to a delete, but have initated our own? + */ + bool simultaneous; +}; + +/** + * Implementation of task_t.build for initiator + */ +static status_t build_i(private_ike_delete_t *this, message_t *message) +{ + delete_payload_t *delete_payload; + + DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]", + this->ike_sa->get_name(this->ike_sa), + this->ike_sa->get_unique_id(this->ike_sa), + this->ike_sa->get_my_host(this->ike_sa), + this->ike_sa->get_my_id(this->ike_sa), + this->ike_sa->get_other_host(this->ike_sa), + this->ike_sa->get_other_id(this->ike_sa)); + + delete_payload = delete_payload_create(PROTO_IKE); + message->add_payload(message, (payload_t*)delete_payload); + + if (this->ike_sa->get_state(this->ike_sa) == IKE_REKEYING) + { + this->rekeyed = TRUE; + } + this->ike_sa->set_state(this->ike_sa, IKE_DELETING); + + DBG1(DBG_IKE, "sending DELETE for IKE_SA %s[%d]", + this->ike_sa->get_name(this->ike_sa), + this->ike_sa->get_unique_id(this->ike_sa)); + + return NEED_MORE; +} + +/** + * Implementation of task_t.process for initiator + */ +static status_t process_i(private_ike_delete_t *this, message_t *message) +{ + DBG0(DBG_IKE, "IKE_SA deleted"); + if (!this->rekeyed) + { /* invoke ike_down() hook if SA has not been rekeyed */ + charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); + } + /* completed, delete IKE_SA by returning DESTROY_ME */ + return DESTROY_ME; +} + +/** + * Implementation of task_t.process for responder + */ +static status_t process_r(private_ike_delete_t *this, message_t *message) +{ + /* we don't even scan the payloads, as the message wouldn't have + * come so far without being correct */ + DBG1(DBG_IKE, "received DELETE for IKE_SA %s[%d]", + this->ike_sa->get_name(this->ike_sa), + this->ike_sa->get_unique_id(this->ike_sa)); + DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]", + this->ike_sa->get_name(this->ike_sa), + this->ike_sa->get_unique_id(this->ike_sa), + this->ike_sa->get_my_host(this->ike_sa), + this->ike_sa->get_my_id(this->ike_sa), + this->ike_sa->get_other_host(this->ike_sa), + this->ike_sa->get_other_id(this->ike_sa)); + + switch (this->ike_sa->get_state(this->ike_sa)) + { + case IKE_ESTABLISHED: + this->ike_sa->set_state(this->ike_sa, IKE_DELETING); + this->ike_sa->reestablish(this->ike_sa); + return NEED_MORE; + case IKE_REKEYING: + this->rekeyed = TRUE; + break; + case IKE_DELETING: + this->simultaneous = TRUE; + break; + default: + break; + } + this->ike_sa->set_state(this->ike_sa, IKE_DELETING); + return NEED_MORE; +} + +/** + * Implementation of task_t.build for responder + */ +static status_t build_r(private_ike_delete_t *this, message_t *message) +{ + DBG0(DBG_IKE, "IKE_SA deleted"); + + if (this->simultaneous) + { + /* wait for peer's response for our delete request, but set a timeout */ + return SUCCESS; + } + if (!this->rekeyed) + { /* invoke ike_down() hook if SA has not been rekeyed */ + charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); + } + /* completed, delete IKE_SA by returning DESTROY_ME */ + return DESTROY_ME; +} + +/** + * Implementation of task_t.get_type + */ +static task_type_t get_type(private_ike_delete_t *this) +{ + return IKE_DELETE; +} + +/** + * Implementation of task_t.migrate + */ +static void migrate(private_ike_delete_t *this, ike_sa_t *ike_sa) +{ + this->ike_sa = ike_sa; + this->simultaneous = FALSE; +} + +/** + * Implementation of task_t.destroy + */ +static void destroy(private_ike_delete_t *this) +{ + free(this); +} + +/* + * Described in header. + */ +ike_delete_t *ike_delete_create(ike_sa_t *ike_sa, bool initiator) +{ + private_ike_delete_t *this = malloc_thing(private_ike_delete_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->ike_sa = ike_sa; + this->initiator = initiator; + this->rekeyed = FALSE; + this->simultaneous = FALSE; + + return &this->public; +} |