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