1027 lines
33 KiB
C++
1027 lines
33 KiB
C++
/* gprs_rlcmac.cpp
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*
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* Copyright (C) 2012 Ivan Klyuchnikov
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* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
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* Copyright (C) 2013 by Holger Hans Peter Freyther
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <gprs_bssgp_pcu.h>
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#include <pcu_l1_if.h>
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#include <gprs_rlcmac.h>
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#include <bts.h>
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#include <tbf.h>
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struct gprs_rlcmac_cs gprs_rlcmac_cs[] = {
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/* frame length data block max payload */
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{ 0, 0, 0 },
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{ 23, 23, 20 }, /* CS-1 */
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{ 34, 33, 30 }, /* CS-2 */
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{ 40, 39, 36 }, /* CS-3 */
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{ 54, 53, 50 }, /* CS-4 */
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};
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LLIST_HEAD(gprs_rlcmac_ul_tbfs);
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LLIST_HEAD(gprs_rlcmac_dl_tbfs);
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llist_head *gprs_rlcmac_tbfs_lists[] = {
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&gprs_rlcmac_ul_tbfs,
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&gprs_rlcmac_dl_tbfs,
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NULL
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};
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extern void *tall_pcu_ctx;
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#ifdef DEBUG_DIAGRAM
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struct timeval diagram_time = {0,0};
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struct timeval diagram_last_tv = {0,0};
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void debug_diagram(int diag, const char *format, ...)
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{
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va_list ap;
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char debug[128];
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char line[1024];
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struct gprs_rlcmac_tbf *tbf, *tbf_a[16];
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int max_diag = -1, i;
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uint64_t diff = 0;
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va_start(ap, format);
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vsnprintf(debug, sizeof(debug) - 1, format, ap);
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debug[19] = ' ';
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debug[20] = '\0';
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va_end(ap);
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memset(tbf_a, 0, sizeof(tbf_a));
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llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) {
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if (tbf->diag < 16) {
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if (tbf->diag > max_diag)
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max_diag = tbf->diag;
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tbf_a[tbf->diag] = tbf;
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}
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}
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llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) {
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if (tbf->diag < 16) {
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if (tbf->diag > max_diag)
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max_diag = tbf->diag;
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tbf_a[tbf->diag] = tbf;
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}
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}
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if (diagram_last_tv.tv_sec) {
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diff = (uint64_t)(diagram_time.tv_sec -
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diagram_last_tv.tv_sec) * 1000;
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diff += diagram_time.tv_usec / 1000;
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diff -= diagram_last_tv.tv_usec / 1000;
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}
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memcpy(&diagram_last_tv, &diagram_time, sizeof(struct timeval));
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if (diff > 0) {
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if (diff > 99999)
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strcpy(line, " ... : ");
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else
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sprintf(line, "%3d.%03d: ", (int)(diff / 1000),
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(int)(diff % 1000));
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for (i = 0; i <= max_diag; i++) {
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if (tbf_a[i] == NULL) {
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strcat(line, " ");
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continue;
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}
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if (tbf_a[i]->diag_new) {
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strcat(line, " | ");
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continue;
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}
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strcat(line, " ");
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}
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puts(line);
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}
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strcpy(line, " : ");
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for (i = 0; i <= max_diag; i++) {
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if (tbf_a[i] == NULL) {
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strcat(line, " ");
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continue;
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}
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if (tbf_a[i]->diag != diag) {
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strcat(line, " | ");
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continue;
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}
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if (strlen(debug) < 19) {
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strcat(line, " ");
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memcpy(line + strlen(line) - 11 - strlen(debug) / 2,
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debug, strlen(debug));
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} else
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strcat(line, debug);
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tbf_a[i]->diag_new = 1;
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}
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puts(line);
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}
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#endif
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/* FIXME: spread resources over multiple TRX. Also add option to use same
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* TRX in case of existing TBF for TLLI in the other direction. */
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/* search for free TFI and return TFI, TRX */
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int tfi_find_free(struct gprs_rlcmac_bts *bts, enum gprs_rlcmac_tbf_direction dir,
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uint8_t *_trx, int8_t use_trx)
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{
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struct gprs_rlcmac_pdch *pdch;
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struct gprs_rlcmac_tbf **tbfp;
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uint8_t trx_from, trx_to, trx, ts, tfi;
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if (use_trx >= 0 && use_trx < 8)
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trx_from = trx_to = use_trx;
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else {
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trx_from = 0;
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trx_to = 7;
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}
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/* on TRX find first enabled TS */
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for (trx = trx_from; trx <= trx_to; trx++) {
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for (ts = 0; ts < 8; ts++) {
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pdch = &bts->trx[trx].pdch[ts];
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if (!pdch->is_enabled())
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continue;
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break;
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}
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if (ts < 8)
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break;
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}
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if (trx > trx_to) {
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LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n");
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return -EINVAL;
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}
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LOGP(DRLCMAC, LOGL_DEBUG, "Searching for first unallocated TFI: "
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"TRX=%d first TS=%d\n", trx, ts);
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if (dir == GPRS_RLCMAC_UL_TBF)
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tbfp = bts->trx[trx].ul_tbf;
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else
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tbfp = bts->trx[trx].dl_tbf;
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for (tfi = 0; tfi < 32; tfi++) {
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if (!tbfp[tfi])
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break;
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}
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if (tfi < 32) {
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LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi);
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*_trx = trx;
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return tfi;
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}
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LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n");
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return -1;
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}
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/* starting time for assigning single slot
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* This offset must be a multiple of 13. */
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#define AGCH_START_OFFSET 52
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LLIST_HEAD(gprs_rlcmac_sbas);
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int sba_alloc(struct gprs_rlcmac_bts *bts,
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uint8_t *_trx, uint8_t *_ts, uint32_t *_fn, uint8_t ta)
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{
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struct gprs_rlcmac_pdch *pdch;
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struct gprs_rlcmac_sba *sba;
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uint8_t trx, ts;
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uint32_t fn;
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sba = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_sba);
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if (!sba)
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return -ENOMEM;
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for (trx = 0; trx < 8; trx++) {
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for (ts = 0; ts < 8; ts++) {
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pdch = &bts->trx[trx].pdch[ts];
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if (!pdch->is_enabled())
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continue;
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break;
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}
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if (ts < 8)
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break;
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}
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if (trx == 8) {
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LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n");
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talloc_free(sba);
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return -EINVAL;
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}
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fn = (pdch->last_rts_fn + AGCH_START_OFFSET) % 2715648;
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sba->trx = trx;
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sba->ts = ts;
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sba->fn = fn;
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sba->ta = ta;
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llist_add(&sba->list, &gprs_rlcmac_sbas);
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*_trx = trx;
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*_ts = ts;
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*_fn = fn;
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return 0;
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}
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struct gprs_rlcmac_sba *sba_find(uint8_t trx, uint8_t ts, uint32_t fn)
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{
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struct gprs_rlcmac_sba *sba;
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llist_for_each_entry(sba, &gprs_rlcmac_sbas, list) {
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if (sba->trx == trx && sba->ts == ts && sba->fn == fn)
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return sba;
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}
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return NULL;
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}
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/* received RLC/MAC block from L1 */
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int gprs_rlcmac_rcv_block(struct gprs_rlcmac_bts *bts,
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uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len,
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uint32_t fn, int8_t rssi)
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{
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unsigned payload = data[0] >> 6;
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bitvec *block;
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int rc = 0;
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switch (payload) {
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case GPRS_RLCMAC_DATA_BLOCK:
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rc = gprs_rlcmac_rcv_data_block_acknowledged(bts, trx, ts, data,
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len, rssi);
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break;
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case GPRS_RLCMAC_CONTROL_BLOCK:
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block = bitvec_alloc(len);
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if (!block)
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return -ENOMEM;
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bitvec_unpack(block, data);
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rc = gprs_rlcmac_rcv_control_block(bts, block, trx, ts, fn);
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bitvec_free(block);
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break;
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case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
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LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
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break;
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default:
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LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload);
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rc = -EINVAL;
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}
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return rc;
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}
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/* add paging to paging queue(s) */
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int gprs_rlcmac_add_paging(struct gprs_rlcmac_bts *bts,
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uint8_t chan_needed, uint8_t *identity_lv)
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{
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uint8_t l, trx, ts, any_tbf = 0;
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struct gprs_rlcmac_tbf *tbf;
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struct gprs_rlcmac_paging *pag;
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uint8_t slot_mask[8];
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int8_t first_ts; /* must be signed */
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LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n",
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chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0]));
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/* collect slots to page
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* Mark slots for every TBF, but only mark one of it.
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* Mark only the first slot found.
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* Don't mark, if TBF uses a different slot that is already marked. */
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memset(slot_mask, 0, sizeof(slot_mask));
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for (l = 0; gprs_rlcmac_tbfs_lists[l]; l++) {
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llist_for_each_entry(tbf, gprs_rlcmac_tbfs_lists[l], list) {
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first_ts = -1;
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for (ts = 0; ts < 8; ts++) {
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if (tbf->pdch[ts]) {
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/* remember the first slot found */
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if (first_ts < 0)
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first_ts = ts;
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/* break, if we already marked a slot */
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if ((slot_mask[tbf->trx_no] & (1 << ts)))
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break;
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}
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}
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/* mark first slot found, if none is marked already */
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if (ts == 8 && first_ts >= 0) {
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LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses "
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"TRX=%d TS=%d, so we mark\n",
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(tbf->direction == GPRS_RLCMAC_UL_TBF)
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? "UL" : "DL",
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tbf->tfi, tbf->trx_no, first_ts);
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slot_mask[tbf->trx_no] |= (1 << first_ts);
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} else
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LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses "
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"already marked TRX=%d TS=%d\n",
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(tbf->direction == GPRS_RLCMAC_UL_TBF)
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? "UL" : "DL",
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tbf->tfi, tbf->trx_no, ts);
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}
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}
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/* Now we have a list of marked slots. Every TBF uses at least one
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* of these slots. */
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/* schedule paging to all marked slots */
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for (trx = 0; trx < 8; trx++) {
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if (slot_mask[trx] == 0)
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continue;
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any_tbf = 1;
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for (ts = 0; ts < 8; ts++) {
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if ((slot_mask[trx] & (1 << ts))) {
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/* schedule */
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pag = talloc_zero(tall_pcu_ctx,
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struct gprs_rlcmac_paging);
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if (!pag)
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return -ENOMEM;
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pag->chan_needed = chan_needed;
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memcpy(pag->identity_lv, identity_lv,
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identity_lv[0] + 1);
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llist_add(&pag->list,
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&bts->trx[trx].pdch[ts].paging_list);
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LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of "
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"TRX=%d TS=%d\n", trx, ts);
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}
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}
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}
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if (!any_tbf)
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LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n");
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return 0;
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}
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struct gprs_rlcmac_paging *gprs_rlcmac_dequeue_paging(
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struct gprs_rlcmac_pdch *pdch)
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{
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struct gprs_rlcmac_paging *pag;
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if (llist_empty(&pdch->paging_list))
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return NULL;
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pag = llist_entry(pdch->paging_list.next,
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struct gprs_rlcmac_paging, list);
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llist_del(&pag->list);
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return pag;
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}
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struct msgb *gprs_rlcmac_send_packet_paging_request(
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struct gprs_rlcmac_pdch *pdch)
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{
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struct gprs_rlcmac_paging *pag;
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struct msgb *msg;
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unsigned wp = 0, len;
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/* no paging, no message */
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pag = gprs_rlcmac_dequeue_paging(pdch);
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if (!pag)
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return NULL;
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LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n");
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/* alloc message */
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msg = msgb_alloc(23, "pag ctrl block");
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if (!msg) {
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talloc_free(pag);
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return NULL;
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}
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bitvec *pag_vec = bitvec_alloc(23);
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if (!pag_vec) {
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msgb_free(msg);
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talloc_free(pag);
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return NULL;
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}
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wp = write_packet_paging_request(pag_vec);
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/* loop until message is full */
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while (pag) {
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/* try to add paging */
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if ((pag->identity_lv[1] & 0x07) == 4) {
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/* TMSI */
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LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n",
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ntohl(*((uint32_t *)(pag->identity_lv + 1))));
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len = 1 + 1 + 1 + 32 + 2 + 1;
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if (pag->identity_lv[0] != 5) {
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LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with "
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"MI != 5 octets!\n");
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goto continue_next;
|
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}
|
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} else {
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/* MI */
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LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n",
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osmo_hexdump(pag->identity_lv + 1,
|
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pag->identity_lv[0]));
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len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1;
|
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if (pag->identity_lv[0] > 8) {
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LOGP(DRLCMAC, LOGL_ERROR, "Paging with "
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"MI > 8 octets!\n");
|
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goto continue_next;
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}
|
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}
|
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if (wp + len > 184) {
|
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LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule "
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"next time\n");
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/* put back paging record, because does not fit */
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llist_add_tail(&pag->list, &pdch->paging_list);
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break;
|
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}
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write_repeated_page_info(pag_vec, wp, pag->identity_lv[0],
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pag->identity_lv + 1, pag->chan_needed);
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|
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continue_next:
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talloc_free(pag);
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pag = gprs_rlcmac_dequeue_paging(pdch);
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}
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|
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bitvec_pack(pag_vec, msgb_put(msg, 23));
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RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
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LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n");
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decode_gsm_rlcmac_downlink(pag_vec, mac_control_block);
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LOGPC(DCSN1, LOGL_NOTICE, "\n");
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LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n");
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bitvec_free(pag_vec);
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talloc_free(mac_control_block);
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|
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return msg;
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}
|
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|
|
// GSM 04.08 9.1.18 Immediate assignment
|
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int write_immediate_assignment(
|
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struct gprs_rlcmac_bts *bts,
|
|
bitvec * dest, uint8_t downlink, uint8_t ra,
|
|
uint32_t ref_fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc,
|
|
uint8_t tfi, uint8_t usf, uint32_t tlli,
|
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uint8_t polling, uint32_t fn, uint8_t single_block, uint8_t alpha,
|
|
uint8_t gamma, int8_t ta_idx)
|
|
{
|
|
unsigned wp = 0;
|
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uint8_t plen;
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|
|
|
bitvec_write_field(dest, wp,0x0,4); // Skip Indicator
|
|
bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator
|
|
bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type
|
|
|
|
// 10.5.2.25b Dedicated mode or TBF
|
|
bitvec_write_field(dest, wp,0x0,1); // spare
|
|
bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning
|
|
bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode
|
|
bitvec_write_field(dest, wp,0x1,1); // T/D : TBF or dedicated mode: this message assigns a Temporary Block Flow (TBF).
|
|
|
|
bitvec_write_field(dest, wp,0x0,4); // Page Mode
|
|
|
|
// GSM 04.08 10.5.2.25a Packet Channel Description
|
|
bitvec_write_field(dest, wp,0x1,5); // Channel type
|
|
bitvec_write_field(dest, wp,ts,3); // TN
|
|
bitvec_write_field(dest, wp,tsc,3); // TSC
|
|
bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion
|
|
bitvec_write_field(dest, wp,arfcn,10); // ARFCN
|
|
|
|
//10.5.2.30 Request Reference
|
|
bitvec_write_field(dest, wp,ra,8); // RA
|
|
bitvec_write_field(dest, wp,(ref_fn / (26 * 51)) % 32,5); // T1'
|
|
bitvec_write_field(dest, wp,ref_fn % 51,6); // T3
|
|
bitvec_write_field(dest, wp,ref_fn % 26,5); // T2
|
|
|
|
// 10.5.2.40 Timing Advance
|
|
bitvec_write_field(dest, wp,0x0,2); // spare
|
|
bitvec_write_field(dest, wp,ta,6); // Timing Advance value
|
|
|
|
// No mobile allocation in non-hopping systems.
|
|
// A zero-length LV. Just write L=0.
|
|
bitvec_write_field(dest, wp,0,8);
|
|
|
|
if ((wp % 8)) {
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "Length of IMM.ASS without rest "
|
|
"octets is not multiple of 8 bits, PLEASE FIX!\n");
|
|
exit (0);
|
|
}
|
|
plen = wp / 8;
|
|
|
|
if (downlink)
|
|
{
|
|
// GSM 04.08 10.5.2.16 IA Rest Octets
|
|
bitvec_write_field(dest, wp, 3, 2); // "HH"
|
|
bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment
|
|
bitvec_write_field(dest, wp,tlli,32); // TLLI
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TFI : on
|
|
bitvec_write_field(dest, wp,tfi,5); // TFI
|
|
bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode
|
|
if (alpha) {
|
|
bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
|
|
bitvec_write_field(dest, wp,alpha,4); // ALPHA
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
|
|
}
|
|
bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
|
|
bitvec_write_field(dest, wp,polling,1); // Polling Bit
|
|
bitvec_write_field(dest, wp,!polling,1); // TA_VALID ???
|
|
if (ta_idx < 0) {
|
|
bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
|
|
bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
|
|
}
|
|
if (polling) {
|
|
bitvec_write_field(dest, wp,0x1,1); // TBF Starting TIME present
|
|
bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1'
|
|
bitvec_write_field(dest, wp,fn % 51,6); // T3
|
|
bitvec_write_field(dest, wp,fn % 26,5); // T2
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present
|
|
}
|
|
bitvec_write_field(dest, wp,0x0,1); // P0 not present
|
|
// bitvec_write_field(dest, wp,0x1,1); // P0 not present
|
|
// bitvec_write_field(dest, wp,0xb,4);
|
|
}
|
|
else
|
|
{
|
|
// GMS 04.08 10.5.2.37b 10.5.2.16
|
|
bitvec_write_field(dest, wp, 3, 2); // "HH"
|
|
bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment
|
|
if (single_block) {
|
|
bitvec_write_field(dest, wp, 0, 1); // Block Allocation : Single Block Allocation
|
|
if (alpha) {
|
|
bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
|
|
bitvec_write_field(dest, wp,alpha,4); // ALPHA = present
|
|
} else
|
|
bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
|
|
bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
|
|
if (ta_idx < 0) {
|
|
bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
|
|
bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
|
|
}
|
|
bitvec_write_field(dest, wp, 1, 1); // TBF_STARTING_TIME_FLAG
|
|
bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1'
|
|
bitvec_write_field(dest, wp,fn % 51,6); // T3
|
|
bitvec_write_field(dest, wp,fn % 26,5); // T2
|
|
} else {
|
|
bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation
|
|
bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity
|
|
bitvec_write_field(dest, wp, 0, 1); // POLLING
|
|
bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic
|
|
bitvec_write_field(dest, wp, usf, 3); // USF
|
|
bitvec_write_field(dest, wp, 0, 1); // USF_GRANULARITY
|
|
bitvec_write_field(dest, wp, 0, 1); // "0" power control: Not Present
|
|
bitvec_write_field(dest, wp, bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND
|
|
bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING
|
|
if (alpha) {
|
|
bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
|
|
bitvec_write_field(dest, wp,alpha,4); // ALPHA
|
|
} else
|
|
bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
|
|
bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
|
|
/* note: there is no choise for TAI and no starting time */
|
|
bitvec_write_field(dest, wp, 0, 1); // switch TIMING_ADVANCE_INDEX = off
|
|
bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG
|
|
}
|
|
}
|
|
|
|
return plen;
|
|
}
|
|
|
|
/* generate uplink assignment */
|
|
void write_packet_uplink_assignment(
|
|
struct gprs_rlcmac_bts *bts,
|
|
bitvec * dest, uint8_t old_tfi,
|
|
uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli,
|
|
struct gprs_rlcmac_tbf *tbf, uint8_t poll, uint8_t alpha,
|
|
uint8_t gamma, int8_t ta_idx)
|
|
{
|
|
// TODO We should use our implementation of encode RLC/MAC Control messages.
|
|
unsigned wp = 0;
|
|
uint8_t ts;
|
|
|
|
bitvec_write_field(dest, wp,0x1,2); // Payload Type
|
|
bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (N+13)
|
|
bitvec_write_field(dest, wp,poll,1); // Suppl/Polling Bit
|
|
bitvec_write_field(dest, wp,0x0,3); // Uplink state flag
|
|
bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE
|
|
|
|
bitvec_write_field(dest, wp,0x0,2); // Page Mode
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off
|
|
if (use_tlli) {
|
|
bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on
|
|
bitvec_write_field(dest, wp,tlli,32); // TLLI
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x0,1); // switch TFI : on
|
|
bitvec_write_field(dest, wp,old_downlink,1); // 0=UPLINK TFI, 1=DL TFI
|
|
bitvec_write_field(dest, wp,old_tfi,5); // TFI
|
|
}
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); // Message escape
|
|
bitvec_write_field(dest, wp,bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND
|
|
bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on
|
|
bitvec_write_field(dest, wp,tbf->ta,6); // TIMING_ADVANCE_VALUE
|
|
if (ta_idx < 0) {
|
|
bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
|
|
bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
|
|
}
|
|
|
|
#if 1
|
|
bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present
|
|
bitvec_write_field(dest, wp,tbf->tsc,3); // Training Sequence Code (TSC)
|
|
bitvec_write_field(dest, wp,0x0,2); // ARFCN = present
|
|
bitvec_write_field(dest, wp,tbf->arfcn,10); // ARFCN
|
|
#else
|
|
bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off
|
|
#endif
|
|
|
|
bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); // Extended Dynamic Allocation = off
|
|
bitvec_write_field(dest, wp,0x0,1); // P0 = off
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); // USF_GRANULARITY
|
|
bitvec_write_field(dest, wp,0x1,1); // switch TFI : on
|
|
bitvec_write_field(dest, wp,tbf->tfi,5);// TFI
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); //
|
|
bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off
|
|
if (alpha || gamma) {
|
|
bitvec_write_field(dest, wp,0x1,1); // Timeslot Allocation with Power Control
|
|
bitvec_write_field(dest, wp,alpha,4); // ALPHA
|
|
} else
|
|
bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation
|
|
|
|
for (ts = 0; ts < 8; ts++) {
|
|
if (tbf->pdch[ts]) {
|
|
bitvec_write_field(dest, wp,0x1,1); // USF_TN(i): on
|
|
bitvec_write_field(dest, wp,tbf->dir.ul.usf[ts],3); // USF_TN(i)
|
|
if (alpha || gamma)
|
|
bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
|
|
} else
|
|
bitvec_write_field(dest, wp,0x0,1); // USF_TN(i): off
|
|
}
|
|
// bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present
|
|
}
|
|
|
|
|
|
/* generate downlink assignment */
|
|
void write_packet_downlink_assignment(RlcMacDownlink_t * block, uint8_t old_tfi,
|
|
uint8_t old_downlink, struct gprs_rlcmac_tbf *tbf, uint8_t poll,
|
|
uint8_t alpha, uint8_t gamma, int8_t ta_idx, uint8_t ta_ts)
|
|
{
|
|
// Packet downlink assignment TS 44.060 11.2.7
|
|
|
|
uint8_t tn;
|
|
|
|
block->PAYLOAD_TYPE = 0x1; // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
|
|
block->RRBP = 0x0; // N+13
|
|
block->SP = poll; // RRBP field is valid
|
|
block->USF = 0x0; // Uplink state flag
|
|
|
|
block->u.Packet_Downlink_Assignment.MESSAGE_TYPE = 0x2; // Packet Downlink Assignment
|
|
block->u.Packet_Downlink_Assignment.PAGE_MODE = 0x0; // Normal Paging
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_PERSISTENCE_LEVEL = 0x0; // PERSISTENCE_LEVEL: off
|
|
|
|
block->u.Packet_Downlink_Assignment.ID.UnionType = 0x0; // TFI = on
|
|
block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.UnionType = old_downlink; // 0=UPLINK TFI, 1=DL TFI
|
|
block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.u.UPLINK_TFI = old_tfi; // TFI
|
|
|
|
block->u.Packet_Downlink_Assignment.MAC_MODE = 0x0; // Dynamic Allocation
|
|
block->u.Packet_Downlink_Assignment.RLC_MODE = 0x0; // RLC acknowledged mode
|
|
block->u.Packet_Downlink_Assignment.CONTROL_ACK = old_downlink; // NW establishes no new DL TBF for the MS with running timer T3192
|
|
block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION = 0; // timeslot(s)
|
|
for (tn = 0; tn < 8; tn++) {
|
|
if (tbf->pdch[tn])
|
|
block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION |= 0x80 >> tn; // timeslot(s)
|
|
}
|
|
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_TIMING_ADVANCE_VALUE = 0x1; // TIMING_ADVANCE_VALUE = on
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_VALUE = tbf->ta; // TIMING_ADVANCE_VALUE
|
|
if (ta_idx < 0) {
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x0; // TIMING_ADVANCE_INDEX = off
|
|
} else {
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x1; // TIMING_ADVANCE_INDEX = on
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_INDEX = ta_idx; // TIMING_ADVANCE_INDEX
|
|
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_TIMESLOT_NUMBER = ta_ts; // TIMING_ADVANCE_TS
|
|
}
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_P0_and_BTS_PWR_CTRL_MODE = 0x0; // POWER CONTROL = off
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_Frequency_Parameters = 0x1; // Frequency Parameters = on
|
|
block->u.Packet_Downlink_Assignment.Frequency_Parameters.TSC = tbf->tsc; // Training Sequence Code (TSC)
|
|
block->u.Packet_Downlink_Assignment.Frequency_Parameters.UnionType = 0x0; // ARFCN = on
|
|
block->u.Packet_Downlink_Assignment.Frequency_Parameters.u.ARFCN = tbf->arfcn; // ARFCN
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_DOWNLINK_TFI_ASSIGNMENT = 0x1; // DOWNLINK TFI ASSIGNMENT = on
|
|
block->u.Packet_Downlink_Assignment.DOWNLINK_TFI_ASSIGNMENT = tbf->tfi; // TFI
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_Power_Control_Parameters = 0x1; // Power Control Parameters = on
|
|
block->u.Packet_Downlink_Assignment.Power_Control_Parameters.ALPHA = alpha; // ALPHA
|
|
|
|
for (tn = 0; tn < 8; tn++)
|
|
{
|
|
if (tbf->pdch[tn])
|
|
{
|
|
block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x1; // Slot[i] = on
|
|
block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].GAMMA_TN = gamma; // GAMMA_TN
|
|
}
|
|
else
|
|
{
|
|
block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x0; // Slot[i] = off
|
|
}
|
|
}
|
|
|
|
block->u.Packet_Downlink_Assignment.Exist_TBF_Starting_Time = 0x0; // TBF Starting TIME = off
|
|
block->u.Packet_Downlink_Assignment.Exist_Measurement_Mapping = 0x0; // Measurement_Mapping = off
|
|
block->u.Packet_Downlink_Assignment.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off
|
|
}
|
|
|
|
/* generate paging request */
|
|
int write_paging_request(bitvec * dest, uint8_t *ptmsi, uint16_t ptmsi_len)
|
|
{
|
|
unsigned wp = 0;
|
|
int plen;
|
|
|
|
bitvec_write_field(dest, wp,0x0,4); // Skip Indicator
|
|
bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator
|
|
bitvec_write_field(dest, wp,0x21,8); // Paging Request Message Type
|
|
|
|
bitvec_write_field(dest, wp,0x0,4); // Page Mode
|
|
bitvec_write_field(dest, wp,0x0,4); // Channel Needed
|
|
|
|
// Mobile Identity
|
|
bitvec_write_field(dest, wp,ptmsi_len+1,8); // Mobile Identity length
|
|
bitvec_write_field(dest, wp,0xf,4); // unused
|
|
bitvec_write_field(dest, wp,0x4,4); // PTMSI type
|
|
for (int i = 0; i < ptmsi_len; i++)
|
|
{
|
|
bitvec_write_field(dest, wp,ptmsi[i],8); // PTMSI
|
|
}
|
|
if ((wp % 8)) {
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "Length of PAG.REQ without rest "
|
|
"octets is not multiple of 8 bits, PLEASE FIX!\n");
|
|
exit (0);
|
|
}
|
|
plen = wp / 8;
|
|
bitvec_write_field(dest, wp,0x0,1); // "L" NLN(PCH) = off
|
|
bitvec_write_field(dest, wp,0x0,1); // "L" Priority1 = off
|
|
bitvec_write_field(dest, wp,0x1,1); // "L" Priority2 = off
|
|
bitvec_write_field(dest, wp,0x0,1); // "L" Group Call information = off
|
|
bitvec_write_field(dest, wp,0x0,1); // "H" Packet Page Indication 1 = packet paging procedure
|
|
bitvec_write_field(dest, wp,0x1,1); // "H" Packet Page Indication 2 = packet paging procedure
|
|
|
|
return plen;
|
|
}
|
|
|
|
/* generate uplink ack */
|
|
void write_packet_uplink_ack(struct gprs_rlcmac_bts *bts,
|
|
RlcMacDownlink_t * block, struct gprs_rlcmac_tbf *tbf,
|
|
uint8_t final)
|
|
{
|
|
// Packet Uplink Ack/Nack TS 44.060 11.2.28
|
|
|
|
char show_v_n[65];
|
|
|
|
uint8_t rbb = 0;
|
|
uint16_t i, bbn;
|
|
uint16_t mod_sns_half = (tbf->sns >> 1) - 1;
|
|
char bit;
|
|
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "Sending Ack/Nack for TBF=%d "
|
|
"(final=%d)\n", tbf->tfi, final);
|
|
|
|
block->PAYLOAD_TYPE = 0x1; // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
|
|
block->RRBP = 0x0; // N+13
|
|
block->SP = final; // RRBP field is valid, if it is final ack
|
|
block->USF = 0x0; // Uplink state flag
|
|
|
|
block->u.Packet_Uplink_Ack_Nack.MESSAGE_TYPE = 0x9; // Packet Downlink Assignment
|
|
block->u.Packet_Uplink_Ack_Nack.PAGE_MODE = 0x0; // Normal Paging
|
|
block->u.Packet_Uplink_Ack_Nack.UPLINK_TFI = tbf->tfi; // Uplink TFI
|
|
|
|
block->u.Packet_Uplink_Ack_Nack.UnionType = 0x0; // PU_AckNack_GPRS = on
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.CHANNEL_CODING_COMMAND = bts->initial_cs_ul - 1; // CS1
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.FINAL_ACK_INDICATION = final; // FINAL ACK INDICATION
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER = tbf->dir.ul.v_r; // STARTING_SEQUENCE_NUMBER
|
|
// RECEIVE_BLOCK_BITMAP
|
|
for (i = 0, bbn = (tbf->dir.ul.v_r - 64) & mod_sns_half; i < 64;
|
|
i++, bbn = (bbn + 1) & mod_sns_half) {
|
|
bit = tbf->dir.ul.v_n[bbn];
|
|
if (bit == 0)
|
|
bit = ' ';
|
|
show_v_n[i] = bit;
|
|
if (bit == 'R')
|
|
rbb = (rbb << 1)|1;
|
|
else
|
|
rbb = (rbb << 1);
|
|
if((i%8) == 7)
|
|
{
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.RECEIVED_BLOCK_BITMAP[i/8] = rbb;
|
|
rbb = 0;
|
|
}
|
|
}
|
|
show_v_n[64] = '\0';
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "- V(N): \"%s\" R=Received "
|
|
"N=Not-Received\n", show_v_n);
|
|
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.UnionType = 0x0; // Fixed Allocation Dummy = on
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.u.FixedAllocationDummy = 0x0; // Fixed Allocation Dummy
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off
|
|
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_CONTENTION_RESOLUTION_TLLI = 0x1;
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.CONTENTION_RESOLUTION_TLLI = tbf->tlli;
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Packet_Timing_Advance = 0x0;
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Extension_Bits = 0x0;
|
|
block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Power_Control_Parameters = 0x0;
|
|
}
|
|
|
|
unsigned write_packet_paging_request(bitvec * dest)
|
|
{
|
|
unsigned wp = 0;
|
|
|
|
bitvec_write_field(dest, wp,0x1,2); // Payload Type
|
|
bitvec_write_field(dest, wp,0x0,3); // No polling
|
|
bitvec_write_field(dest, wp,0x0,3); // Uplink state flag
|
|
bitvec_write_field(dest, wp,0x22,6); // MESSAGE TYPE
|
|
|
|
bitvec_write_field(dest, wp,0x0,2); // Page Mode
|
|
|
|
bitvec_write_field(dest, wp,0x0,1); // No PERSISTENCE_LEVEL
|
|
bitvec_write_field(dest, wp,0x0,1); // No NLN
|
|
|
|
return wp;
|
|
}
|
|
|
|
unsigned write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len,
|
|
uint8_t *identity, uint8_t chan_needed)
|
|
{
|
|
bitvec_write_field(dest, wp,0x1,1); // Repeated Page info exists
|
|
|
|
bitvec_write_field(dest, wp,0x1,1); // RR connection paging
|
|
|
|
if ((identity[0] & 0x07) == 4) {
|
|
bitvec_write_field(dest, wp,0x0,1); // TMSI
|
|
identity++;
|
|
len--;
|
|
} else {
|
|
bitvec_write_field(dest, wp,0x0,1); // MI
|
|
bitvec_write_field(dest, wp,len,4); // MI len
|
|
}
|
|
while (len) {
|
|
bitvec_write_field(dest, wp,*identity++,8); // MI data
|
|
len--;
|
|
}
|
|
bitvec_write_field(dest, wp,chan_needed,2); // CHANNEL_NEEDED
|
|
bitvec_write_field(dest, wp,0x0,1); // No eMLPP_PRIORITY
|
|
|
|
return wp;
|
|
}
|
|
|
|
/* Send Uplink unit-data to SGSN. */
|
|
int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf)
|
|
{
|
|
uint8_t qos_profile[3];
|
|
struct msgb *llc_pdu;
|
|
unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->llc_index;
|
|
struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx();
|
|
|
|
LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] TFI: %u TLLI: 0x%08x len=%d\n", tbf->tfi, tbf->tlli, tbf->llc_index);
|
|
if (!bctx) {
|
|
LOGP(DBSSGP, LOGL_ERROR, "No bctx\n");
|
|
return -EIO;
|
|
}
|
|
|
|
llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu");
|
|
uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*tbf->llc_index));
|
|
tl16v_put(buf, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->llc_index, tbf->llc_frame);
|
|
qos_profile[0] = QOS_PROFILE >> 16;
|
|
qos_profile[1] = QOS_PROFILE >> 8;
|
|
qos_profile[2] = QOS_PROFILE;
|
|
bssgp_tx_ul_ud(bctx, tbf->tlli, qos_profile, llc_pdu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gprs_rlcmac_paging_request(uint8_t *ptmsi, uint16_t ptmsi_len,
|
|
const char *imsi)
|
|
{
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Paging Request (CCCH)\n");
|
|
bitvec *paging_request = bitvec_alloc(23);
|
|
bitvec_unhex(paging_request, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
|
int plen = write_paging_request(paging_request, ptmsi, ptmsi_len);
|
|
pcu_l1if_tx_pch(paging_request, plen, (char *)imsi);
|
|
bitvec_free(paging_request);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* timing advance memory
|
|
*/
|
|
|
|
/* enable to debug timing advance memory */
|
|
//#define DEBUG_TA
|
|
|
|
static LLIST_HEAD(gprs_rlcmac_ta_list);
|
|
static int gprs_rlcmac_ta_num = 0;
|
|
|
|
struct gprs_rlcmac_ta {
|
|
struct llist_head list;
|
|
uint32_t tlli;
|
|
uint8_t ta;
|
|
};
|
|
|
|
/* remember timing advance of a given TLLI */
|
|
int remember_timing_advance(uint32_t tlli, uint8_t ta)
|
|
{
|
|
struct gprs_rlcmac_ta *ta_entry;
|
|
|
|
/* check for existing entry */
|
|
llist_for_each_entry(ta_entry, &gprs_rlcmac_ta_list, list) {
|
|
if (ta_entry->tlli == tlli) {
|
|
#ifdef DEBUG_TA
|
|
fprintf(stderr, "update %08x %d\n", tlli, ta);
|
|
#endif
|
|
ta_entry->ta = ta;
|
|
/* relink to end of list */
|
|
llist_del(&ta_entry->list);
|
|
llist_add_tail(&ta_entry->list, &gprs_rlcmac_ta_list);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_TA
|
|
fprintf(stderr, "remember %08x %d\n", tlli, ta);
|
|
#endif
|
|
/* if list is full, remove oldest entry */
|
|
if (gprs_rlcmac_ta_num == 30) {
|
|
ta_entry = llist_entry(gprs_rlcmac_ta_list.next,
|
|
struct gprs_rlcmac_ta, list);
|
|
llist_del(&ta_entry->list);
|
|
talloc_free(ta_entry);
|
|
gprs_rlcmac_ta_num--;
|
|
}
|
|
|
|
/* create new TA entry */
|
|
ta_entry = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_ta);
|
|
if (!ta_entry)
|
|
return -ENOMEM;
|
|
|
|
ta_entry->tlli = tlli;
|
|
ta_entry->ta = ta;
|
|
llist_add_tail(&ta_entry->list, &gprs_rlcmac_ta_list);
|
|
gprs_rlcmac_ta_num++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int recall_timing_advance(uint32_t tlli)
|
|
{
|
|
struct gprs_rlcmac_ta *ta_entry;
|
|
uint8_t ta;
|
|
|
|
llist_for_each_entry(ta_entry, &gprs_rlcmac_ta_list, list) {
|
|
if (ta_entry->tlli == tlli) {
|
|
ta = ta_entry->ta;
|
|
#ifdef DEBUG_TA
|
|
fprintf(stderr, "recall %08x %d\n", tlli, ta);
|
|
#endif
|
|
return ta;
|
|
}
|
|
}
|
|
#ifdef DEBUG_TA
|
|
fprintf(stderr, "no entry for %08x\n", tlli);
|
|
#endif
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
int flush_timing_advance(void)
|
|
{
|
|
struct gprs_rlcmac_ta *ta_entry;
|
|
int count = 0;
|
|
|
|
while (!llist_empty(&gprs_rlcmac_ta_list)) {
|
|
ta_entry = llist_entry(gprs_rlcmac_ta_list.next,
|
|
struct gprs_rlcmac_ta, list);
|
|
#ifdef DEBUG_TA
|
|
fprintf(stderr, "flush entry %08x %d\n", ta_entry->tlli,
|
|
ta_entry->ta);
|
|
#endif
|
|
llist_del(&ta_entry->list);
|
|
talloc_free(ta_entry);
|
|
count++;
|
|
}
|
|
gprs_rlcmac_ta_num = 0;
|
|
|
|
return count;
|
|
}
|
|
|