145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/* NMT transaction handling
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*
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* (C) 2016 by Andreas Eversberg <jolly@eversberg.eu>
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* All Rights Reserved
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../libsample/sample.h"
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#include "../libdebug/debug.h"
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#include "nmt.h"
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#include "transaction.h"
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static transaction_t *trans_list = NULL;
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static void transaction_timeout(struct timer *timer);
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/* link transaction to list */
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static void link_transaction(transaction_t *trans)
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{
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transaction_t **transp;
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/* attach to end of list, so first transaction is served first */
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PDEBUG(DTRANS, DEBUG_DEBUG, "Linking transaction %p to list\n", trans);
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trans->next = NULL;
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transp = &trans_list;
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while (*transp)
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transp = &((*transp)->next);
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*transp = trans;
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}
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/* unlink transaction from list */
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static void unlink_transaction(transaction_t *trans)
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{
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transaction_t **transp;
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sender_t *sender;
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nmt_t *nmt;
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/* unlink */
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PDEBUG(DTRANS, DEBUG_DEBUG, "Unlinking transaction %p from list\n", trans);
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transp = &trans_list;
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while (*transp && *transp != trans)
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transp = &((*transp)->next);
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if (!(*transp)) {
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PDEBUG(DTRANS, DEBUG_ERROR, "Transaction not in list, please fix!!\n");
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abort();
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}
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*transp = trans->next;
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trans->next = NULL;
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/* unbind from channel */
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trans->nmt = NULL;
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for (sender = sender_head; sender; sender = sender->next) {
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nmt = (nmt_t *)sender;
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if (nmt->trans == trans)
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nmt_go_idle(nmt);
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}
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}
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/* create transaction */
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transaction_t *create_transaction(struct nmt_subscriber *subscr)
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{
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transaction_t *trans;
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trans = calloc(1, sizeof(*trans));
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if (!trans) {
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PDEBUG(DTRANS, DEBUG_ERROR, "No memory!\n");
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return NULL;
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}
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timer_init(&trans->timer, transaction_timeout, trans);
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memcpy(&trans->subscriber, subscr, sizeof(struct nmt_subscriber));
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PDEBUG(DTRANS, DEBUG_INFO, "Created transaction for subscriber '%c,%s'\n", subscr->country, subscr->number);
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link_transaction(trans);
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return trans;
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}
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/* destroy transaction */
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void destroy_transaction(transaction_t *trans)
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{
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unlink_transaction(trans);
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PDEBUG(DTRANS, DEBUG_INFO, "Destroying transaction for subscriber '%c,%s'\n", trans->subscriber.country, trans->subscriber.number);
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timer_exit(&trans->timer);
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free(trans);
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}
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/* Timeout handling */
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static void transaction_timeout(struct timer *timer)
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{
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transaction_t *trans = (transaction_t *)timer->priv;
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timeout_mt_paging(trans);
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}
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transaction_t *get_transaction_by_callref(int callref)
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{
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transaction_t *trans;
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trans = trans_list;
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while (trans) {
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if (trans->callref == callref)
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break;
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trans = trans->next;
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}
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return trans;
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}
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transaction_t *get_transaction_by_number(struct nmt_subscriber *subscr)
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{
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transaction_t *trans;
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trans = trans_list;
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while (trans) {
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if (trans->subscriber.country == subscr->country
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&& !strcmp(trans->subscriber.number, subscr->number))
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break;
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trans = trans->next;
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}
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return trans;
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}
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