| /* OpenBSC E1 Input code */ |
| |
| /* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <netinet/in.h> |
| |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/e1_input.h> |
| #include <openbsc/trau_frame.h> |
| #include <openbsc/trau_mux.h> |
| #include <openbsc/misdn.h> |
| #include <openbsc/ipaccess.h> |
| #include <osmocore/talloc.h> |
| #include <openbsc/debug.h> |
| |
| #define SAPI_L2ML 0 |
| #define SAPI_OML 62 |
| #define SAPI_RSL 0 /* 63 ? */ |
| |
| /* The e1_reconfig_*() functions below tale the configuration present in the |
| * bts/trx/ts data structures and ensure the E1 configuration reflects the |
| * timeslot/subslot/TEI configuration */ |
| |
| int e1_reconfig_ts(struct gsm_bts_trx_ts *ts) |
| { |
| struct gsm_e1_subslot *e1_link = &ts->e1_link; |
| struct e1inp_line *line; |
| struct e1inp_ts *e1_ts; |
| |
| DEBUGP(DMI, "e1_reconfig_ts(%u,%u,%u)\n", ts->trx->bts->nr, ts->trx->nr, ts->nr); |
| |
| if (!e1_link->e1_ts) { |
| LOGP(DINP, LOGL_ERROR, "TS (%u/%u/%u) without E1 timeslot?\n", |
| ts->nr, ts->trx->nr, ts->trx->bts->nr); |
| return 0; |
| } |
| |
| line = e1inp_line_get(e1_link->e1_nr); |
| if (!line) { |
| LOGP(DINP, LOGL_ERROR, "TS (%u/%u/%u) referring to " |
| "non-existing E1 line %u\n", ts->nr, ts->trx->nr, |
| ts->trx->bts->nr, e1_link->e1_nr); |
| return -ENOMEM; |
| } |
| |
| switch (ts->pchan) { |
| case GSM_PCHAN_TCH_F: |
| case GSM_PCHAN_TCH_H: |
| e1_ts = &line->ts[e1_link->e1_ts-1]; |
| e1inp_ts_config(e1_ts, line, E1INP_TS_TYPE_TRAU); |
| subch_demux_activate(&e1_ts->trau.demux, e1_link->e1_ts_ss); |
| break; |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| int e1_reconfig_trx(struct gsm_bts_trx *trx) |
| { |
| struct gsm_e1_subslot *e1_link = &trx->rsl_e1_link; |
| struct e1inp_ts *sign_ts; |
| struct e1inp_line *line; |
| struct e1inp_sign_link *rsl_link; |
| int i; |
| |
| if (!e1_link->e1_ts) { |
| LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link without " |
| "timeslot?\n", trx->bts->nr, trx->nr); |
| return -EINVAL; |
| } |
| |
| /* RSL Link */ |
| line = e1inp_line_get(e1_link->e1_nr); |
| if (!line) { |
| LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link referring " |
| "to non-existing E1 line %u\n", trx->bts->nr, |
| trx->nr, e1_link->e1_nr); |
| return -ENOMEM; |
| } |
| sign_ts = &line->ts[e1_link->e1_ts-1]; |
| e1inp_ts_config(sign_ts, line, E1INP_TS_TYPE_SIGN); |
| /* Ericsson RBS have a per-TRX OML link in parallel to RSL */ |
| if (trx->bts->type == GSM_BTS_TYPE_RBS2000) { |
| struct e1inp_sign_link *oml_link; |
| oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, trx, |
| trx->rsl_tei, SAPI_OML); |
| if (!oml_link) { |
| LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) OML link creation " |
| "failed\n", trx->bts->nr, trx->nr); |
| return -ENOMEM; |
| } |
| if (trx->oml_link) |
| e1inp_sign_link_destroy(trx->oml_link); |
| trx->oml_link = oml_link; |
| } |
| rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, |
| trx, trx->rsl_tei, SAPI_RSL); |
| if (!rsl_link) { |
| LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) RSL link creation " |
| "failed\n", trx->bts->nr, trx->nr); |
| return -ENOMEM; |
| } |
| if (trx->rsl_link) |
| e1inp_sign_link_destroy(trx->rsl_link); |
| trx->rsl_link = rsl_link; |
| |
| for (i = 0; i < TRX_NR_TS; i++) |
| e1_reconfig_ts(&trx->ts[i]); |
| |
| return 0; |
| } |
| |
| int e1_reconfig_bts(struct gsm_bts *bts) |
| { |
| struct gsm_e1_subslot *e1_link = &bts->oml_e1_link; |
| struct e1inp_ts *sign_ts; |
| struct e1inp_line *line; |
| struct e1inp_sign_link *oml_link; |
| struct gsm_bts_trx *trx; |
| |
| DEBUGP(DMI, "e1_reconfig_bts(%u)\n", bts->nr); |
| |
| if (!e1_link->e1_ts) { |
| LOGP(DINP, LOGL_ERROR, "BTS %u OML link without timeslot?\n", |
| bts->nr); |
| return -EINVAL; |
| } |
| |
| /* OML link */ |
| line = e1inp_line_get(e1_link->e1_nr); |
| if (!line) { |
| LOGP(DINP, LOGL_ERROR, "BTS %u OML link referring to " |
| "non-existing E1 line %u\n", bts->nr, e1_link->e1_nr); |
| return -ENOMEM; |
| } |
| sign_ts = &line->ts[e1_link->e1_ts-1]; |
| e1inp_ts_config(sign_ts, line, E1INP_TS_TYPE_SIGN); |
| oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, |
| bts->c0, bts->oml_tei, SAPI_OML); |
| if (!oml_link) { |
| LOGP(DINP, LOGL_ERROR, "BTS %u OML link creation failed\n", |
| bts->nr); |
| return -ENOMEM; |
| } |
| if (bts->oml_link) |
| e1inp_sign_link_destroy(bts->oml_link); |
| bts->oml_link = oml_link; |
| |
| llist_for_each_entry(trx, &bts->trx_list, list) |
| e1_reconfig_trx(trx); |
| |
| /* notify E1 input something has changed */ |
| return e1inp_line_update(line); |
| } |
| |
| #if 0 |
| /* do some compiled-in configuration for our BTS/E1 setup */ |
| int e1_config(struct gsm_bts *bts, int cardnr, int release_l2) |
| { |
| struct e1inp_line *line; |
| struct e1inp_ts *sign_ts; |
| struct e1inp_sign_link *oml_link, *rsl_link; |
| struct gsm_bts_trx *trx = bts->c0; |
| int base_ts; |
| |
| switch (bts->nr) { |
| case 0: |
| /* First BTS uses E1 TS 01,02,03,04,05 */ |
| base_ts = HARDCODED_BTS0_TS - 1; |
| break; |
| case 1: |
| /* Second BTS uses E1 TS 06,07,08,09,10 */ |
| base_ts = HARDCODED_BTS1_TS - 1; |
| break; |
| case 2: |
| /* Third BTS uses E1 TS 11,12,13,14,15 */ |
| base_ts = HARDCODED_BTS2_TS - 1; |
| default: |
| return -EINVAL; |
| } |
| |
| line = talloc_zero(tall_bsc_ctx, struct e1inp_line); |
| if (!line) |
| return -ENOMEM; |
| |
| /* create E1 timeslots for signalling and TRAU frames */ |
| e1inp_ts_config(&line->ts[base_ts+1-1], line, E1INP_TS_TYPE_SIGN); |
| e1inp_ts_config(&line->ts[base_ts+2-1], line, E1INP_TS_TYPE_TRAU); |
| e1inp_ts_config(&line->ts[base_ts+3-1], line, E1INP_TS_TYPE_TRAU); |
| |
| /* create signalling links for TS1 */ |
| sign_ts = &line->ts[base_ts+1-1]; |
| oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, |
| trx, TEI_OML, SAPI_OML); |
| rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, |
| trx, TEI_RSL, SAPI_RSL); |
| |
| /* create back-links from bts/trx */ |
| bts->oml_link = oml_link; |
| trx->rsl_link = rsl_link; |
| |
| /* enable subchannel demuxer on TS2 */ |
| subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 1); |
| subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 2); |
| subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 3); |
| |
| /* enable subchannel demuxer on TS3 */ |
| subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 0); |
| subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 1); |
| subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 2); |
| subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 3); |
| |
| trx = gsm_bts_trx_num(bts, 1); |
| if (trx) { |
| /* create E1 timeslots for TRAU frames of TRX1 */ |
| e1inp_ts_config(&line->ts[base_ts+4-1], line, E1INP_TS_TYPE_TRAU); |
| e1inp_ts_config(&line->ts[base_ts+5-1], line, E1INP_TS_TYPE_TRAU); |
| |
| /* create RSL signalling link for TRX1 */ |
| sign_ts = &line->ts[base_ts+1-1]; |
| rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, |
| trx, TEI_RSL+1, SAPI_RSL); |
| /* create back-links from trx */ |
| trx->rsl_link = rsl_link; |
| |
| /* enable subchannel demuxer on TS2 */ |
| subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 0); |
| subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 1); |
| subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 2); |
| subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 3); |
| |
| /* enable subchannel demuxer on TS3 */ |
| subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 0); |
| subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 1); |
| subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 2); |
| subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 3); |
| } |
| |
| return mi_setup(cardnr, line, release_l2); |
| } |
| #endif |
| |
| /* configure pseudo E1 line in ip.access style and connect to BTS */ |
| int ia_config_connect(struct gsm_bts *bts, struct sockaddr_in *sin) |
| { |
| struct e1inp_line *line; |
| struct e1inp_ts *sign_ts, *rsl_ts; |
| struct e1inp_sign_link *oml_link, *rsl_link; |
| |
| line = talloc_zero(tall_bsc_ctx, struct e1inp_line); |
| if (!line) |
| return -ENOMEM; |
| |
| /* create E1 timeslots for signalling and TRAU frames */ |
| e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); |
| e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_SIGN); |
| |
| /* create signalling links for TS1 */ |
| sign_ts = &line->ts[1-1]; |
| rsl_ts = &line->ts[2-1]; |
| oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, |
| bts->c0, 0xff, 0); |
| rsl_link = e1inp_sign_link_create(rsl_ts, E1INP_SIGN_RSL, |
| bts->c0, 0, 0); |
| |
| /* create back-links from bts/trx */ |
| bts->oml_link = oml_link; |
| bts->c0->rsl_link = rsl_link; |
| |
| /* default port at BTS for incoming connections is 3006 */ |
| if (sin->sin_port == 0) |
| sin->sin_port = htons(3006); |
| |
| return ipaccess_connect(line, sin); |
| } |