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/* NMT transaction handling
*
* (C) 2016 by Andreas Eversberg <jolly@eversberg.eu>
* All Rights Reserved
*
* 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 3 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "../common/sample.h"
#include "../common/debug.h"
#include "../common/timer.h"
#include "nmt.h"
#include "transaction.h"
static transaction_t *trans_list = NULL;
static void transaction_timeout(struct timer *timer);
/* link transaction to list */
static void link_transaction(transaction_t *trans)
{
transaction_t **transp;
/* attach to end of list, so first transaction is served first */
PDEBUG(DTRANS, DEBUG_DEBUG, "Linking transaction %p to list\n", trans);
trans->next = NULL;
transp = &trans_list;
while (*transp)
transp = &((*transp)->next);
*transp = trans;
}
/* unlink transaction from list */
static void unlink_transaction(transaction_t *trans)
{
transaction_t **transp;
sender_t *sender;
nmt_t *nmt;
/* unlink */
PDEBUG(DTRANS, DEBUG_DEBUG, "Unlinking transaction %p from list\n", trans);
transp = &trans_list;
while (*transp && *transp != trans)
transp = &((*transp)->next);
if (!(*transp)) {
PDEBUG(DTRANS, DEBUG_ERROR, "Transaction not in list, please fix!!\n");
abort();
}
*transp = trans->next;
trans->next = NULL;
/* unbind from channel */
trans->nmt = NULL;
for (sender = sender_head; sender; sender = sender->next) {
nmt = (nmt_t *)sender;
if (nmt->trans == trans)
nmt_go_idle(nmt);
}
}
/* create transaction */
transaction_t *create_transaction(struct nmt_subscriber *subscr)
{
transaction_t *trans;
trans = calloc(1, sizeof(*trans));
if (!trans) {
PDEBUG(DTRANS, DEBUG_ERROR, "No memory!\n");
return NULL;
}
timer_init(&trans->timer, transaction_timeout, trans);
memcpy(&trans->subscriber, subscr, sizeof(struct nmt_subscriber));
PDEBUG(DTRANS, DEBUG_INFO, "Created transaction for subscriber '%c,%s'\n", subscr->country, subscr->number);
link_transaction(trans);
return trans;
}
/* destroy transaction */
void destroy_transaction(transaction_t *trans)
{
unlink_transaction(trans);
PDEBUG(DTRANS, DEBUG_INFO, "Destroying transaction for subscriber '%c,%s'\n", trans->subscriber.country, trans->subscriber.number);
timer_exit(&trans->timer);
free(trans);
}
/* Timeout handling */
static void transaction_timeout(struct timer *timer)
{
transaction_t *trans = (transaction_t *)timer->priv;
timeout_mt_paging(trans);
}
transaction_t *get_transaction_by_callref(int callref)
{
transaction_t *trans;
trans = trans_list;
while (trans) {
if (trans->callref == callref)
break;
trans = trans->next;
}
return trans;
}
transaction_t *get_transaction_by_number(struct nmt_subscriber *subscr)
{
transaction_t *trans;
trans = trans_list;
while (trans) {
if (trans->subscriber.country == subscr->country
&& !strcmp(trans->subscriber.number, subscr->number))
break;
trans = trans->next;
}
return trans;
}
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