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Diffstat (limited to 'Source/charon/sa/ike_sa_manager.c')
-rw-r--r-- | Source/charon/sa/ike_sa_manager.c | 790 |
1 files changed, 790 insertions, 0 deletions
diff --git a/Source/charon/sa/ike_sa_manager.c b/Source/charon/sa/ike_sa_manager.c new file mode 100644 index 000000000..def7d6d40 --- /dev/null +++ b/Source/charon/sa/ike_sa_manager.c @@ -0,0 +1,790 @@ +/** + * @file ike_sa_manager.c + * + * @brief Central point for managing IKE-SAs (creation, locking, deleting...) + * + */ + +/* + * Copyright (C) 2005 Jan Hutter, 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 <pthread.h> +#include <string.h> + +#include "ike_sa_manager.h" + +#include <globals.h> +#include <sa/ike_sa_id.h> +#include <utils/allocator.h> +#include <utils/logger.h> +#include <utils/logger_manager.h> +#include <utils/linked_list.h> + +/** + * @brief An entry in the linked list, contains IKE_SA, locking and lookup data. + */ +typedef struct ike_sa_entry_s ike_sa_entry_t; +struct ike_sa_entry_s { + /** + * destructor, also destroys ike_sa + */ + status_t (*destroy) (ike_sa_entry_t *this); + /** + * Number of threads waiting for this ike_sa + */ + int waiting_threads; + /** + * condvar where threads can wait until it's free again + */ + pthread_cond_t condvar; + /** + * is this ike_sa currently checked out? + */ + bool checked_out; + /** + * Does this SA drives out new threads? + */ + bool driveout_new_threads; + /** + * Does this SA drives out waiting threads? + */ + bool driveout_waiting_threads; + /** + * identifiaction of ike_sa (SPIs) + */ + ike_sa_id_t *ike_sa_id; + /** + * the contained ike_sa + */ + ike_sa_t *ike_sa; +}; + +/** + * @see ike_sa_entry_t.destroy + */ +static status_t ike_sa_entry_destroy(ike_sa_entry_t *this) +{ + /* also destroy IKE SA */ + this->ike_sa->destroy(this->ike_sa); + this->ike_sa_id->destroy(this->ike_sa_id); + allocator_free(this); + return SUCCESS; +} + +/** + * @brief creates a new entry for the ike_sa list + * + * This constructor additionaly creates a new and empty SA + * + * @param ike_sa_id the associated ike_sa_id_t, will be cloned + * @return created entry, with ike_sa and ike_sa_id + */ +static ike_sa_entry_t *ike_sa_entry_create(ike_sa_id_t *ike_sa_id) +{ + ike_sa_entry_t *this = allocator_alloc_thing(ike_sa_entry_t); + + if (this == NULL) + { + return NULL; + } + + /* destroy function */ + this->destroy = ike_sa_entry_destroy; + + this->waiting_threads = 0; + pthread_cond_init(&(this->condvar), NULL); + + /* we set checkout flag when we really give it out */ + this->checked_out = FALSE; + this->driveout_new_threads = FALSE; + this->driveout_waiting_threads = FALSE; + + /* ike_sa_id is always cloned */ + ike_sa_id->clone(ike_sa_id, &(this->ike_sa_id)); + if (this->ike_sa_id == NULL) + { + allocator_free(this); + return NULL; + } + + /* create new ike_sa */ + this->ike_sa = ike_sa_create(ike_sa_id); + if (this->ike_sa == NULL) + { + this->ike_sa_id->destroy(this->ike_sa_id); + allocator_free(this); + return NULL; + + } + return this; +} + +/** + * Additional private members to ike_sa_manager_t + */ +typedef struct private_ike_sa_manager_s private_ike_sa_manager_t; +struct private_ike_sa_manager_s { + /** + * Public members + */ + ike_sa_manager_t public; + + /** + * @brief get next spi + * + * we give out SPIs incremental + * + * @param this the ike_sa_manager + * @param spi[out] spi will be written here + * @return SUCCESS or, + * OUT_OF_RES when we already served 2^64 SPIs ;-) + */ + status_t (*get_next_spi) (private_ike_sa_manager_t *this, u_int64_t *spi); + + /** + * @brief find the ike_sa_entry in the list by SPIs + * + * This function simply iterates over the linked list. A hash-table + * would be more efficient when storing a lot of IKE_SAs... + * + * @param this the ike_sa_manager containing the list + * @param ike_sa_id id of the ike_sa, containing SPIs + * @param entry[out] pointer to set to the found entry + * @return + * - SUCCESS when found, + * - NOT_FOUND when no such ike_sa_id in list + * - OUT_OF_RES + */ + status_t (*get_entry_by_id) (private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_entry_t **entry); + + /** + * @brief find the ike_sa_entry in the list by pointer to SA. + * + * This function simply iterates over the linked list. A hash-table + * would be more efficient when storing a lot of IKE_SAs... + * + * @param this the ike_sa_manager containing the list + * @param ike_sa pointer to the ike_sa + * @param entry[out] pointer to set to the found entry + * @return + * - SUCCESS when found, + * - NOT_FOUND when no such ike_sa_id in list + * - OUT_OF_RES + */ + status_t (*get_entry_by_sa) (private_ike_sa_manager_t *this, ike_sa_t *ike_sa, ike_sa_entry_t **entry); + + /** + * @brief delete an entry from the linked list + * + * @param this the ike_sa_manager containing the list + * @param entry entry to delete + * @return + * - SUCCESS when found, + * - NOT_FOUND when no such ike_sa_id in list + */ + status_t (*delete_entry) (private_ike_sa_manager_t *this, ike_sa_entry_t *entry); + + /** + * lock for exclusivly accessing the manager + */ + pthread_mutex_t mutex; + + /** + * Logger used for this IKE SA Manager + */ + logger_t *logger; + + /** + * Linked list with entries for the ike_sa + */ + linked_list_t *ike_sa_list; + + /** + * Next SPI, needed for incremental creation of SPIs + */ + u_int64_t next_spi; +}; + + +/** + * @see private_ike_sa_manager_t.get_entry_by_id + */ +static status_t get_entry_by_id(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_entry_t **entry) +{ + linked_list_t *list = this->ike_sa_list; + linked_list_iterator_t *iterator; + status_t status; + + /* create iterator over list of ike_sa's */ + status = list->create_iterator(list, &iterator, TRUE); + if (status != SUCCESS) + { + this->logger->log(this->logger,ERROR,"Fatal Error: could not create iterator: %s",mapping_find(status_m,status)); + /* out of res */ + return status; + } + + /* default status */ + status = NOT_FOUND; + + + while (iterator->has_next(iterator)) + { + ike_sa_entry_t *current; + bool are_equal = FALSE; + + iterator->current(iterator, (void**)¤t); + if (current->ike_sa_id->get_responder_spi(current->ike_sa_id) == 0) { + /* seems to be a half ready ike_sa */ + if ((current->ike_sa_id->get_initiator_spi(current->ike_sa_id) == ike_sa_id->get_initiator_spi(ike_sa_id)) + && (ike_sa_id->is_initiator(ike_sa_id) == current->ike_sa_id->is_initiator(current->ike_sa_id))) + { + this->logger->log(this->logger,CONTROL | MOST,"Found entry by initiator spi %d",ike_sa_id->get_initiator_spi(ike_sa_id)); + *entry = current; + status = SUCCESS; + break; + } + } + current->ike_sa_id->equals(current->ike_sa_id, ike_sa_id, &are_equal); + if (are_equal) + { + this->logger->log(this->logger,CONTROL | MOST,"Found entry by full ID"); + *entry = current; + status = SUCCESS; + break; + } + } + + iterator->destroy(iterator); + return status; +} + +/** + * @see private_ike_sa_manager_t.get_entry_by_sa + */ +static status_t get_entry_by_sa(private_ike_sa_manager_t *this, ike_sa_t *ike_sa, ike_sa_entry_t **entry) +{ + linked_list_t *list = this->ike_sa_list; + linked_list_iterator_t *iterator; + status_t status; + + status = list->create_iterator(list, &iterator, TRUE); + if (status != SUCCESS) + { + this->logger->log(this->logger,ERROR,"Fatal Error: could not create iterator: %s",mapping_find(status_m,status)); + return status; + } + + /* default status */ + status = NOT_FOUND; + + while (iterator->has_next(iterator)) + { + ike_sa_entry_t *current; + iterator->current(iterator, (void**)¤t); + /* only pointers are compared */ + if (current->ike_sa == ike_sa) + { + this->logger->log(this->logger,CONTROL | MOST,"Found entry by pointer"); + *entry = current; + status = SUCCESS; + break; + } + } + iterator->destroy(iterator); + return status; +} + +/** + * @see private_ike_sa_manager_s.delete_entry + */ +static status_t delete_entry(private_ike_sa_manager_t *this, ike_sa_entry_t *entry) +{ + linked_list_t *list = this->ike_sa_list; + linked_list_iterator_t *iterator; + status_t status; + + status = list->create_iterator(list, &iterator, TRUE); + + if (status != SUCCESS) + { + this->logger->log(this->logger,ERROR,"Fatal Error: could not create iterator: %s",mapping_find(status_m,status)); + return status; + } + + status = NOT_FOUND; + + while (iterator->has_next(iterator)) + { + ike_sa_entry_t *current; + iterator->current(iterator, (void**)¤t); + if (current == entry) + { + this->logger->log(this->logger,CONTROL | MOST,"Found entry by pointer. Going to delete it."); + list->remove(list, iterator); + entry->destroy(entry); + status = SUCCESS; + break; + } + } + iterator->destroy(iterator); + return status; +} + + +/** + * @see private_ike_sa_manager_t.get_next_spi + */ +static status_t get_next_spi(private_ike_sa_manager_t *this, u_int64_t *spi) +{ + this->next_spi++; + if (this->next_spi == 0) { + /* our software ran so incredible stable, we have no more + * SPIs to give away :-/. */ + this->logger->log(this->logger,CONTROL | MOST,"No more SPI values available. WOW!"); + return OUT_OF_RES; + } + *spi = this->next_spi; + return SUCCESS; +} + +/** + * @see ike_sa_manager_s.checkout_ike_sa + */ +static status_t checkout(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_t **ike_sa) +{ + bool responder_spi_set; + bool initiator_spi_set; + status_t retval; + + /* each access is locked */ + pthread_mutex_lock(&(this->mutex)); + + responder_spi_set = (FALSE != ike_sa_id->get_responder_spi(ike_sa_id)); + initiator_spi_set = (FALSE != ike_sa_id->get_initiator_spi(ike_sa_id)); + + if (initiator_spi_set && responder_spi_set) + { + /* we SHOULD have an IKE_SA for these SPIs in the list, + * if not, we can't handle the request... + */ + ike_sa_entry_t *entry; + /* look for the entry */ + if (this->get_entry_by_id(this, ike_sa_id, &entry) == SUCCESS) + { + /* can we give this ike_sa out to new requesters?*/ + if (entry->driveout_new_threads) + { + this->logger->log(this->logger,CONTROL|MORE,"Drive out new thread for existing IKE_SA"); + /* no we can't */ + retval = NOT_FOUND; + } + else + { + /* is this IKE_SA already checked out ?? + * are we welcome to get this SA ? */ + while (entry->checked_out && !entry->driveout_waiting_threads) + { + /* so wait until we can get it for us. + * we register us as waiting. + */ + entry->waiting_threads++; + pthread_cond_wait(&(entry->condvar), &(this->mutex)); + entry->waiting_threads--; + } + + /* hm, a deletion request forbids us to get this SA, go home */ + if (entry->driveout_waiting_threads) + { + /* we must signal here, others are interested that we leave */ + pthread_cond_signal(&(entry->condvar)); + this->logger->log(this->logger,CONTROL|MORE,"Drive out waiting thread for existing IKE_SA"); + retval = NOT_FOUND; + } + else + { + this->logger->log(this->logger,CONTROL|MOST,"IKE SA successfully checked out"); + /* ok, this IKE_SA is finally ours */ + entry->checked_out = TRUE; + *ike_sa = entry->ike_sa; + /* DON'T use return, we must unlock the mutex! */ + retval = SUCCESS; + } + } + } + else + { + this->logger->log(this->logger,ERROR | MORE,"IKE SA not stored in known IKE_SA list"); + /* looks like there is no such IKE_SA, better luck next time... */ + /* DON'T use return, we must unlock the mutex! */ + retval = NOT_FOUND; + } + } + else if (initiator_spi_set && !responder_spi_set) + { + /* an IKE_SA_INIT from an another endpoint, + * he is the initiator. + * For simplicity, we do NOT check for retransmitted + * IKE_SA_INIT-Requests here, so EVERY single IKE_SA_INIT- + * Request (even a retransmitted one) will result in a + * IKE_SA. This could be improved... + */ + u_int64_t responder_spi; + ike_sa_entry_t *new_ike_sa_entry; + + + /* set SPIs, we are the responder */ + retval = this->get_next_spi(this, &responder_spi); + + if (retval == SUCCESS) + { /* next SPI could be created */ + + /* we also set arguments spi, so its still valid */ + ike_sa_id->set_responder_spi(ike_sa_id, responder_spi); + + /* create entry */ + new_ike_sa_entry = ike_sa_entry_create(ike_sa_id); + if (new_ike_sa_entry != NULL) + { + retval = this->ike_sa_list->insert_last(this->ike_sa_list, new_ike_sa_entry); + if (retval == SUCCESS) + { + /* check ike_sa out */ + this->logger->log(this->logger,CONTROL | MORE ,"IKE_SA added to list of known IKE_SA's"); + new_ike_sa_entry->checked_out = TRUE; + *ike_sa = new_ike_sa_entry->ike_sa; + + /* DON'T use return, we must unlock the mutex! */ + } + else + { + /* ike_sa_entry could not be added to list*/ + this->logger->log(this->logger,ERROR,"Fatal error: ike_sa_entry could not be added to list"); + } + } + else + { + /* new ike_sa_entry could not be created */ + this->logger->log(this->logger,ERROR,"Fatal error: ike_sa_entry could not be created"); + } + } + else + { /* next SPI could not be created */ + this->logger->log(this->logger,ERROR,"Fatal error: Next SPI could not be created"); + } + + } + else if (!initiator_spi_set && !responder_spi_set) + { + /* creation of an IKE_SA from local site, + * we are the initiator! + */ + u_int64_t initiator_spi; + ike_sa_entry_t *new_ike_sa_entry; + + retval = this->get_next_spi(this, &initiator_spi); + if (retval == SUCCESS) + { + /* we also set arguments SPI, so its still valid */ + ike_sa_id->set_initiator_spi(ike_sa_id, initiator_spi); + + /* create entry */ + new_ike_sa_entry = ike_sa_entry_create(ike_sa_id); + if (new_ike_sa_entry != NULL) + { + retval = this->ike_sa_list->insert_last(this->ike_sa_list, new_ike_sa_entry); + + if (retval == SUCCESS) + { + /* check ike_sa out */ + this->logger->log(this->logger,CONTROL | MORE ,"New IKE_SA created and added to list of known IKE_SA's"); + new_ike_sa_entry->checked_out = TRUE; + *ike_sa = new_ike_sa_entry->ike_sa; + + /* DON'T use return, we must unlock the mutex! */ + } + else + { + /* ike_sa_entry could not be added to list*/ + this->logger->log(this->logger,ERROR,"Fatal error: ike_sa_entry could not be added to list"); + } + } + else + { + /* new ike_sa_entry could not be created */ + this->logger->log(this->logger,ERROR,"Fatal error: ike_sa_entry could not be created"); + } + } + else + { + /* next SPI could not be created */ + this->logger->log(this->logger,ERROR,"Fatal error: Next SPI could not be created"); + } + + + } + else + { + /* responder set, initiator not: here is something seriously wrong! */ + this->logger->log(this->logger,ERROR | MORE,"Invalid IKE_SA SPI's"); + /* DON'T use return, we must unlock the mutex! */ + retval = INVALID_ARG; + } + + pthread_mutex_unlock(&(this->mutex)); + /* OK, unlocked... */ + return retval; +} + +/** + * Implements ike_sa_manager_t-function checkin. + * @see ike_sa_manager_t.checkin. + */ +static status_t checkin(private_ike_sa_manager_t *this, ike_sa_t *ike_sa) +{ + /* to check the SA back in, we look for the pointer of the ike_sa + * in all entries. + * We can't search by SPI's since the MAY have changed (e.g. on reception + * of a IKE_SA_INIT response). Updating of the SPI MAY be necessary... + */ + status_t retval; + ike_sa_entry_t *entry; + + pthread_mutex_lock(&(this->mutex)); + + /* look for the entry */ + if (this->get_entry_by_sa(this, ike_sa, &entry) == SUCCESS) + { + /* ike_sa_id must be updated */ + entry->ike_sa_id->replace_values(entry->ike_sa_id, ike_sa->get_id(ike_sa)); + /* signal waiting threads */ + entry->checked_out = FALSE; + this->logger->log(this->logger,CONTROL | MORE,"Checkin of IKE_SA successful."); + pthread_cond_signal(&(entry->condvar)); + retval = SUCCESS; + } + else + { + this->logger->log(this->logger,ERROR,"Fatal Error: Tried to checkin nonexisting IKE_SA"); + /* this SA is no more, this REALLY should not happen */ + retval = NOT_FOUND; + } + pthread_mutex_unlock(&(this->mutex)); + return retval; +} + + +/** + * Implements ike_sa_manager_t-function checkin_and_delete. + * @see ike_sa_manager_t.checkin_and_delete. + */ +static status_t checkin_and_delete(private_ike_sa_manager_t *this, ike_sa_t *ike_sa) +{ + /* deletion is a bit complex, we must garant that no thread is waiting for + * this SA. + * We take this SA from the list, and start signaling while threads + * are in the condvar. + */ + ike_sa_entry_t *entry; + status_t retval; + + pthread_mutex_lock(&(this->mutex)); + + if (this->get_entry_by_sa(this, ike_sa, &entry) == SUCCESS) + { + /* mark it, so now new threads can acquire this SA */ + entry->driveout_new_threads = TRUE; + /* additionaly, drive out waiting threads */ + entry->driveout_waiting_threads = TRUE; + + /* wait until all workers have done their work */ + while (entry->waiting_threads > 0) + { + /* let the other threads do some work*/ + pthread_cond_signal(&(entry->condvar)); + /* and the nice thing, they will wake us again when their work is done */ + pthread_cond_wait(&(entry->condvar), &(this->mutex)); + } + /* ok, we are alone now, no threads waiting in the entry's condvar */ + this->delete_entry(this, entry); + this->logger->log(this->logger,CONTROL | MORE,"Checkin and delete of IKE_SA successful"); + retval = SUCCESS; + } + else + { + this->logger->log(this->logger,ERROR,"Fatal Error: Tried to checkin and delete nonexisting IKE_SA"); + retval = NOT_FOUND; + } + + pthread_mutex_unlock(&(this->mutex)); + return retval; +} + +/** + * Implements ike_sa_manager_t-function delete. + * @see ike_sa_manager_t.delete. + */ +static status_t delete(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id) +{ + /* deletion is a bit complex, we must garant that no thread is waiting for + * this SA. + * We take this SA from the list, and start signaling while threads + * are in the condvar. + */ + ike_sa_entry_t *entry; + status_t retval; + + pthread_mutex_lock(&(this->mutex)); + + if (this->get_entry_by_id(this, ike_sa_id, &entry) == SUCCESS) + { + /* mark it, so now new threads can acquire this SA */ + entry->driveout_new_threads = TRUE; + + /* wait until all workers have done their work */ + while (entry->waiting_threads) + { + /* wake up all */ + pthread_cond_signal(&(entry->condvar)); + /* and the nice thing, they will wake us again when their work is done */ + pthread_cond_wait(&(entry->condvar), &(this->mutex)); + } + /* ok, we are alone now, no threads waiting in the entry's condvar */ + this->delete_entry(this, entry); + this->logger->log(this->logger,CONTROL | MORE,"Delete of IKE_SA successful"); + retval = SUCCESS; + } + else + { + this->logger->log(this->logger,ERROR,"Fatal Error: Tried to delete nonexisting IKE_SA"); + retval = NOT_FOUND; + } + + pthread_mutex_unlock(&(this->mutex)); + return retval; +} + +/** + * Implements ike_sa_manager_t-function destroy. + * @see ike_sa_manager_t.destroy. + */ +static status_t destroy(private_ike_sa_manager_t *this) +{ + /* destroy all list entries */ + linked_list_t *list = this->ike_sa_list; + linked_list_iterator_t *iterator; + status_t status; + ike_sa_entry_t *entry; + + pthread_mutex_lock(&(this->mutex)); + + this->logger->log(this->logger,CONTROL | MORE,"Going to destroy IKE_SA manager and all managed IKE_SA's"); + + /* Step 1: drive out all waiting threads */ + status = list->create_iterator(list, &iterator, TRUE); + + if (status != SUCCESS) + { + this->logger->log(this->logger,ERROR,"Fatal Error: Create of iterator while destroying IKE_SA-Manager failed"); + return FAILED; + } + + this->logger->log(this->logger,CONTROL | MOST,"Set driveout flags for all stored IKE_SA's"); + while (iterator->has_next(iterator)) + { + iterator->current(iterator, (void**)&entry); + /* do not accept new threads, drive out waiting threads */ + entry->driveout_new_threads = TRUE; + entry->driveout_waiting_threads = TRUE; + } + + this->logger->log(this->logger,CONTROL | MOST,"Wait for all threads to leave IKE_SA's"); + /* Step 2: wait until all are gone */ + iterator->reset(iterator); + while (iterator->has_next(iterator)) + { + iterator->current(iterator, (void**)&entry); + while (entry->waiting_threads) + { + /* wake up all */ + pthread_cond_signal(&(entry->condvar)); + /* go sleeping until they are gone */ + pthread_cond_wait(&(entry->condvar), &(this->mutex)); + } + } + this->logger->log(this->logger,CONTROL | MOST,"Delete all IKE_SA's"); + /* Step 3: delete all entries */ + iterator->destroy(iterator); + + while (list->get_count(list) > 0) + { + list->get_first(list, (void**)&entry); + this->delete_entry(this, entry); + } + list->destroy(list); + this->logger->log(this->logger,CONTROL | MOST,"IKE_SA's deleted"); + pthread_mutex_unlock(&(this->mutex)); + + /* destroy logger at end */ + global_logger_manager->destroy_logger(global_logger_manager,this->logger); + + allocator_free(this); + + return SUCCESS; +} + +/* + * Described in header + */ +ike_sa_manager_t *ike_sa_manager_create() +{ + private_ike_sa_manager_t *this = allocator_alloc_thing(private_ike_sa_manager_t); + + /* assign public functions */ + this->public.destroy = (status_t(*)(ike_sa_manager_t*))destroy; + this->public.checkout = (status_t(*)(ike_sa_manager_t*, ike_sa_id_t *sa_id, ike_sa_t **sa))checkout; + this->public.checkin = (status_t(*)(ike_sa_manager_t*, ike_sa_t *sa))checkin; + this->public.delete = (status_t(*)(ike_sa_manager_t*, ike_sa_id_t *sa_id))delete; + this->public.checkin_and_delete = (status_t(*)(ike_sa_manager_t*, ike_sa_t *ike_sa))checkin_and_delete; + + /* initialize private functions */ + this->get_next_spi = get_next_spi; + this->get_entry_by_sa = get_entry_by_sa; + this->get_entry_by_id = get_entry_by_id; + this->delete_entry = delete_entry; + + /* initialize private variables */ + this->logger = global_logger_manager->create_logger(global_logger_manager,IKE_SA_MANAGER,NULL); + if (this->logger == NULL) + { + allocator_free(this); + return NULL; + } + + this->ike_sa_list = linked_list_create(); + if (this->ike_sa_list == NULL) + { + this->logger->log(this->logger,ERROR,"Fatal error: Failed to create list for managed IKE_SA"); + global_logger_manager->destroy_logger(global_logger_manager,this->logger); + allocator_free(this); + return NULL; + } + + pthread_mutex_init(&(this->mutex), NULL); + + this->next_spi = 0; + + return (ike_sa_manager_t*)this; +} |