263 lines
6.9 KiB
C
263 lines
6.9 KiB
C
/* C-Netz 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 "../common/sample.h"
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#include "../common/debug.h"
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#include "../common/call.h"
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#include "../common/cause.h"
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#include "amps.h"
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//#include "database.h"
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static const char *trans_state_name(int state)
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{
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switch (state) {
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case 0:
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return "IDLE";
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case TRANS_REGISTER_ACK:
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return "REGISTER ACK";
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case TRANS_REGISTER_ACK_SEND:
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return "REGISTER ACK SEND";
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case TRANS_CALL_MO_ASSIGN:
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return "CALL ASSIGN MOBILE ORIGINATING";
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case TRANS_CALL_MO_ASSIGN_SEND:
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return "CALL ASSIGN MOBILE ORIGINATING SEND";
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case TRANS_CALL_MT_ASSIGN:
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return "CALL ASSIGN MOBILE TERMINATING";
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case TRANS_CALL_MT_ASSIGN_SEND:
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return "CALL ASSIGN MOBILE TERMINATING SEND";
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case TRANS_CALL_MT_ALERT:
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return "CALL ALERT MOBILE TERMINATING";
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case TRANS_CALL_MT_ALERT_SEND:
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return "CALL ALERT MOBILE TERMINATING SEND";
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case TRANS_CALL_REJECT:
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return "CALL REJECT";
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case TRANS_CALL_REJECT_SEND:
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return "CALL REJECT SEND";
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case TRANS_CALL:
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return "CALL";
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case TRANS_CALL_RELEASE:
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return "CALL RELEASE";
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case TRANS_CALL_RELEASE_SEND:
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return "CALL RELEASE SEND";
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case TRANS_PAGE:
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return "PAGE";
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case TRANS_PAGE_SEND:
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return "PAGE SEND";
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case TRANS_PAGE_REPLY:
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return "PAGE REPLY";
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default:
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return "<invald transaction state>";
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}
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}
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const char *trans_short_state_name(int state)
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{
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switch (state) {
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case 0:
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return "IDLE";
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case TRANS_REGISTER_ACK:
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case TRANS_REGISTER_ACK_SEND:
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return "REGISTER";
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case TRANS_CALL_MO_ASSIGN:
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case TRANS_CALL_MO_ASSIGN_SEND:
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case TRANS_CALL_MT_ASSIGN:
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case TRANS_CALL_MT_ASSIGN_SEND:
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return "ASSIGN";
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case TRANS_CALL_MT_ALERT:
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case TRANS_CALL_MT_ALERT_SEND:
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return "ALERT";
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case TRANS_CALL_REJECT:
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case TRANS_CALL_REJECT_SEND:
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return "REJECT";
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case TRANS_CALL:
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return "CALL";
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case TRANS_CALL_RELEASE:
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case TRANS_CALL_RELEASE_SEND:
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return "RELEASE";
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case TRANS_PAGE:
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case TRANS_PAGE_SEND:
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case TRANS_PAGE_REPLY:
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return "PAGE";
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default:
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return "<invald transaction state>";
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}
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}
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/* create transaction */
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transaction_t *create_transaction(amps_t *amps, enum amps_trans_state state, uint32_t min1, uint16_t min2, uint8_t msg_type, uint8_t ordq, uint8_t order, uint16_t chan)
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{
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sender_t *sender;
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transaction_t *trans = NULL;
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amps_t *search_amps;
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/* search transaction for this subsriber */
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for (sender = sender_head; sender; sender = sender->next) {
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search_amps = (amps_t *) sender;
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/* search transaction for this callref */
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trans = search_transaction_number(search_amps, min1, min2);
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if (trans)
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break;
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}
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if (trans) {
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const char *number = amps_min2number(trans->min1, trans->min2);
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int old_callref = trans->callref;
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amps_t *old_amps = trans->amps;
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PDEBUG(DTRANS, DEBUG_NOTICE, "Found alredy pending transaction for subscriber '%s', deleting!\n", number);
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destroy_transaction(trans);
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if (old_amps) /* should be... */
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amps_go_idle(old_amps);
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if (old_callref)
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call_up_release(old_callref, CAUSE_NORMAL);
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}
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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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trans_new_state(trans, state);
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trans->min1 = min1;
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trans->min2 = min2;
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trans->msg_type = msg_type;
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trans->ordq = ordq;
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trans->order = order;
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trans->chan = chan;
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const char *number = amps_min2number(trans->min1, trans->min2);
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PDEBUG(DTRANS, DEBUG_INFO, "Created transaction for subscriber '%s'\n", number);
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link_transaction(trans, amps);
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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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const char *number = amps_min2number(trans->min1, trans->min2);
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PDEBUG(DTRANS, DEBUG_INFO, "Destroying transaction for subscriber '%s'\n", number);
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timer_exit(&trans->timer);
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trans_new_state(trans, 0);
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free(trans);
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}
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/* link transaction to list */
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void link_transaction(transaction_t *trans, amps_t *amps)
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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 amps %p\n", trans, amps);
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trans->amps = amps;
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trans->next = NULL;
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transp = &s->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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amps_display_status();
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}
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/* unlink transaction from list */
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void unlink_transaction(transaction_t *trans)
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{
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transaction_t **transp;
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/* unlink */
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PDEBUG(DTRANS, DEBUG_DEBUG, "Unlinking transaction %p from amps %p\n", trans, trans->amps);
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transp = &trans->amps->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->amps = NULL;
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amps_display_status();
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}
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transaction_t *search_transaction_number(amps_t *amps, uint32_t min1, uint16_t min2)
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{
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transaction_t *trans = amps->trans_list;
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while (trans) {
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if (trans->min1 == min1
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&& trans->min2 == min2) {
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const char *number = amps_min2number(trans->min1, trans->min2);
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PDEBUG(DTRANS, DEBUG_DEBUG, "Found transaction for subscriber '%s'\n", number);
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return trans;
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}
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trans = trans->next;
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}
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return NULL;
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}
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transaction_t *search_transaction_callref(amps_t *amps, int callref)
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{
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transaction_t *trans = amps->trans_list;
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/* just in case, this should not happen */
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if (!callref)
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return NULL;
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while (trans) {
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if (trans->callref == callref) {
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const char *number = amps_min2number(trans->min1, trans->min2);
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PDEBUG(DTRANS, DEBUG_DEBUG, "Found transaction for subscriber '%s'\n", number);
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return trans;
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}
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trans = trans->next;
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}
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return NULL;
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}
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void trans_new_state(transaction_t *trans, int state)
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{
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PDEBUG(DTRANS, DEBUG_INFO, "Transaction state %s -> %s\n", trans_state_name(trans->state), trans_state_name(state));
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trans->state = state;
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amps_display_status();
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}
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void amps_flush_other_transactions(amps_t *amps, transaction_t *trans)
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{
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/* flush after this very trans */
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while (trans->next) {
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PDEBUG(DTRANS, DEBUG_NOTICE, "Kicking other pending transaction\n");
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destroy_transaction(trans->next);
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}
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/* flush before this very trans */
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while (amps->trans_list != trans) {
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PDEBUG(DTRANS, DEBUG_NOTICE, "Kicking other pending transaction\n");
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destroy_transaction(amps->trans_list);
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}
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}
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