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#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/talloc.h>
#define SAPI_L2ML 0
#define SAPI_OML 62
#define SAPI_RSL 0 /* 63 ? */
#define TEI_L2ML 127
#define TEI_OML 25
#define TEI_RSL 1
/* 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);
}
/* 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, 0, 0xff);
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);
}
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