237 lines
6.6 KiB
C
237 lines
6.6 KiB
C
#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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return 0;
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line = e1inp_line_get_create(e1_link->e1_nr);
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if (!line)
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return -ENOMEM;
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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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return -EINVAL;
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/* RSL Link */
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line = e1inp_line_get_create(e1_link->e1_nr);
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if (!line)
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return -ENOMEM;
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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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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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return -ENOMEM;
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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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return -EINVAL;
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/* OML link */
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line = e1inp_line_get_create(e1_link->e1_nr);
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if (!line)
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return -ENOMEM;
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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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return -ENOMEM;
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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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