84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
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/* Paging helper and manager.... */
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/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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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 2 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/*
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* Relevant specs:
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* 12.21:
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* - 9.4.12 for CCCH Local Threshold
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*
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* 05.58:
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* - 8.5.2 CCCH Load indication
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* - 9.3.15 Paging Load
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*
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* Approach:
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* - Send paging command to subscriber
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* - On Channel Request we will remember the reason
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* - After the ACK we will request the identity
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* - Then we will send assign the gsm_subscriber and
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* - and call a callback
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*/
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#include <openbsc/paging.h>
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#include <openbsc/debug.h>
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static LLIST_HEAD(managed_bts);
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static int page_pending_request(struct paging_bts *bts,
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struct gsm_subscriber *subscr) {
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struct paging_request *req;
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llist_for_each_entry(req, &bts->pending_requests, entry) {
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if (subscr == req->subscr)
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return 1;
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}
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return 0;
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}
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struct paging_bts* page_allocate(struct gsm_bts *bts) {
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struct paging_bts *page;
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page = (struct paging_bts *)malloc(sizeof(*page));
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memset(page, 0, sizeof(*page));
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llist_add_tail(&page->bts_list, &managed_bts);
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return page;
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}
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void page_request(struct gsm_bts *bts, struct gsm_subscriber *subscr) {
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struct paging_bts *bts_entry;
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struct paging_request *req;
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req = (struct paging_request *)malloc(sizeof(*req));
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req->subscr = subscr_get(subscr);
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req->bts = bts;
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llist_for_each_entry(bts_entry, &managed_bts, bts_list) {
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if (bts == bts_entry->bts && !page_pending_request(bts_entry, subscr)) {
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llist_add_tail(&req->entry, &bts_entry->pending_requests);
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return;
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}
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}
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DEBUGP(DPAG, "Paging request for not mnaged BTS\n");
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free(req);
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return;
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}
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