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https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw.git
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15ccc77f62
So far, all BTS we have interfaced had one OML link per BTS, independent of the number of TRX. In Ericsson RBS 2000, there is an OML link for the DXU/IXU, and one additional OML link for each TRX/TRU.
297 lines
8.7 KiB
C
297 lines
8.7 KiB
C
/* OpenBSC E1 Input code */
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/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.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 Affero 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero 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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*/
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#include <string.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/e1_input.h>
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#include <openbsc/trau_frame.h>
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#include <openbsc/trau_mux.h>
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#include <openbsc/misdn.h>
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#include <openbsc/ipaccess.h>
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#include <osmocore/talloc.h>
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#include <openbsc/debug.h>
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#define SAPI_L2ML 0
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#define SAPI_OML 62
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#define SAPI_RSL 0 /* 63 ? */
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/* The e1_reconfig_*() functions below tale the configuration present in the
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* bts/trx/ts data structures and ensure the E1 configuration reflects the
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* timeslot/subslot/TEI configuration */
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int e1_reconfig_ts(struct gsm_bts_trx_ts *ts)
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{
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struct gsm_e1_subslot *e1_link = &ts->e1_link;
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struct e1inp_line *line;
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struct e1inp_ts *e1_ts;
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DEBUGP(DMI, "e1_reconfig_ts(%u,%u,%u)\n", ts->trx->bts->nr, ts->trx->nr, ts->nr);
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if (!e1_link->e1_ts) {
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LOGP(DINP, LOGL_ERROR, "TS (%u/%u/%u) without E1 timeslot?\n",
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ts->nr, ts->trx->nr, ts->trx->bts->nr);
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return 0;
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}
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line = e1inp_line_get(e1_link->e1_nr);
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if (!line) {
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LOGP(DINP, LOGL_ERROR, "TS (%u/%u/%u) referring to "
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"non-existing E1 line %u\n", ts->nr, ts->trx->nr,
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ts->trx->bts->nr, e1_link->e1_nr);
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return -ENOMEM;
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}
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switch (ts->pchan) {
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case GSM_PCHAN_TCH_F:
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case GSM_PCHAN_TCH_H:
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e1_ts = &line->ts[e1_link->e1_ts-1];
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e1inp_ts_config(e1_ts, line, E1INP_TS_TYPE_TRAU);
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subch_demux_activate(&e1_ts->trau.demux, e1_link->e1_ts_ss);
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break;
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default:
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break;
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}
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return 0;
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}
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int e1_reconfig_trx(struct gsm_bts_trx *trx)
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{
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struct gsm_e1_subslot *e1_link = &trx->rsl_e1_link;
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struct e1inp_ts *sign_ts;
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struct e1inp_line *line;
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struct e1inp_sign_link *rsl_link;
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int i;
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if (!e1_link->e1_ts) {
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LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link without "
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"timeslot?\n", trx->bts->nr, trx->nr);
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return -EINVAL;
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}
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/* RSL Link */
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line = e1inp_line_get(e1_link->e1_nr);
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if (!line) {
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LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link referring "
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"to non-existing E1 line %u\n", trx->bts->nr,
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trx->nr, e1_link->e1_nr);
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return -ENOMEM;
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}
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sign_ts = &line->ts[e1_link->e1_ts-1];
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e1inp_ts_config(sign_ts, line, E1INP_TS_TYPE_SIGN);
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/* Ericsson RBS have a per-TRX OML link in parallel to RSL */
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if (trx->bts->type == GSM_BTS_TYPE_RBS2000) {
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struct e1inp_sign_link *oml_link;
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oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, trx,
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trx->rsl_tei, SAPI_OML);
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if (!oml_link) {
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LOGP(DINP, LOGL_ERROR, "TRX (%u/$u) OML link creation "
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"failed\n", trx->bts->nr, trx->nr);
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return -ENOMEM;
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}
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if (trx->oml_link)
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e1inp_sign_link_destroy(trx->oml_link);
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trx->oml_link = oml_link;
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}
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rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
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trx, trx->rsl_tei, SAPI_RSL);
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if (!rsl_link) {
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LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link creation "
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"failed\n", trx->bts->nr, trx->nr);
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return -ENOMEM;
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}
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if (trx->rsl_link)
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e1inp_sign_link_destroy(trx->rsl_link);
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trx->rsl_link = rsl_link;
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for (i = 0; i < TRX_NR_TS; i++)
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e1_reconfig_ts(&trx->ts[i]);
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return 0;
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}
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int e1_reconfig_bts(struct gsm_bts *bts)
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{
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struct gsm_e1_subslot *e1_link = &bts->oml_e1_link;
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struct e1inp_ts *sign_ts;
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struct e1inp_line *line;
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struct e1inp_sign_link *oml_link;
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struct gsm_bts_trx *trx;
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DEBUGP(DMI, "e1_reconfig_bts(%u)\n", bts->nr);
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if (!e1_link->e1_ts) {
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LOGP(DINP, LOGL_ERROR, "BTS %u OML link without timeslot?\n",
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bts->nr);
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return -EINVAL;
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}
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/* OML link */
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line = e1inp_line_get(e1_link->e1_nr);
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if (!line) {
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LOGP(DINP, LOGL_ERROR, "BTS %u OML link referring to "
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"non-existing E1 line %u\n", bts->nr, e1_link->e1_nr);
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return -ENOMEM;
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}
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sign_ts = &line->ts[e1_link->e1_ts-1];
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e1inp_ts_config(sign_ts, line, E1INP_TS_TYPE_SIGN);
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oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
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bts->c0, bts->oml_tei, SAPI_OML);
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if (!oml_link) {
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LOGP(DINP, LOGL_ERROR, "BTS %u OML link creation failed\n",
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bts->nr);
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return -ENOMEM;
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}
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if (bts->oml_link)
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e1inp_sign_link_destroy(bts->oml_link);
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bts->oml_link = oml_link;
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llist_for_each_entry(trx, &bts->trx_list, list)
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e1_reconfig_trx(trx);
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/* notify E1 input something has changed */
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return e1inp_line_update(line);
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}
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#if 0
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/* do some compiled-in configuration for our BTS/E1 setup */
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int e1_config(struct gsm_bts *bts, int cardnr, int release_l2)
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{
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struct e1inp_line *line;
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struct e1inp_ts *sign_ts;
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struct e1inp_sign_link *oml_link, *rsl_link;
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struct gsm_bts_trx *trx = bts->c0;
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int base_ts;
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switch (bts->nr) {
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case 0:
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/* First BTS uses E1 TS 01,02,03,04,05 */
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base_ts = HARDCODED_BTS0_TS - 1;
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break;
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case 1:
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/* Second BTS uses E1 TS 06,07,08,09,10 */
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base_ts = HARDCODED_BTS1_TS - 1;
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break;
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case 2:
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/* Third BTS uses E1 TS 11,12,13,14,15 */
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base_ts = HARDCODED_BTS2_TS - 1;
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default:
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return -EINVAL;
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}
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line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
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if (!line)
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return -ENOMEM;
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/* create E1 timeslots for signalling and TRAU frames */
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e1inp_ts_config(&line->ts[base_ts+1-1], line, E1INP_TS_TYPE_SIGN);
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e1inp_ts_config(&line->ts[base_ts+2-1], line, E1INP_TS_TYPE_TRAU);
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e1inp_ts_config(&line->ts[base_ts+3-1], line, E1INP_TS_TYPE_TRAU);
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/* create signalling links for TS1 */
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sign_ts = &line->ts[base_ts+1-1];
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oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
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trx, TEI_OML, SAPI_OML);
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rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
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trx, TEI_RSL, SAPI_RSL);
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/* create back-links from bts/trx */
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bts->oml_link = oml_link;
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trx->rsl_link = rsl_link;
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/* enable subchannel demuxer on TS2 */
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subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 1);
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subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 2);
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subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 3);
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/* enable subchannel demuxer on TS3 */
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subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 0);
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subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 1);
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subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 2);
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subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 3);
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trx = gsm_bts_trx_num(bts, 1);
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if (trx) {
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/* create E1 timeslots for TRAU frames of TRX1 */
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e1inp_ts_config(&line->ts[base_ts+4-1], line, E1INP_TS_TYPE_TRAU);
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e1inp_ts_config(&line->ts[base_ts+5-1], line, E1INP_TS_TYPE_TRAU);
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/* create RSL signalling link for TRX1 */
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sign_ts = &line->ts[base_ts+1-1];
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rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
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trx, TEI_RSL+1, SAPI_RSL);
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/* create back-links from trx */
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trx->rsl_link = rsl_link;
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/* enable subchannel demuxer on TS2 */
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subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 0);
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subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 1);
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subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 2);
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subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 3);
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/* enable subchannel demuxer on TS3 */
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subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 0);
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subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 1);
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subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 2);
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subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 3);
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}
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return mi_setup(cardnr, line, release_l2);
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}
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#endif
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/* configure pseudo E1 line in ip.access style and connect to BTS */
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int ia_config_connect(struct gsm_bts *bts, struct sockaddr_in *sin)
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{
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struct e1inp_line *line;
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struct e1inp_ts *sign_ts, *rsl_ts;
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struct e1inp_sign_link *oml_link, *rsl_link;
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line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
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if (!line)
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return -ENOMEM;
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/* create E1 timeslots for signalling and TRAU frames */
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e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
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e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_SIGN);
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/* create signalling links for TS1 */
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sign_ts = &line->ts[1-1];
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rsl_ts = &line->ts[2-1];
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oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
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bts->c0, 0xff, 0);
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rsl_link = e1inp_sign_link_create(rsl_ts, E1INP_SIGN_RSL,
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bts->c0, 0, 0);
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/* create back-links from bts/trx */
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bts->oml_link = oml_link;
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bts->c0->rsl_link = rsl_link;
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/* default port at BTS for incoming connections is 3006 */
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if (sin->sin_port == 0)
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sin->sin_port = htons(3006);
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return ipaccess_connect(line, sin);
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}
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