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-rw-r--r--openbsc/src/e1_config.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/openbsc/src/e1_config.c b/openbsc/src/e1_config.c
new file mode 100644
index 00000000..fc23b55e
--- /dev/null
+++ b/openbsc/src/e1_config.c
@@ -0,0 +1,108 @@
+#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>
+
+#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;
+
+ line = malloc(sizeof(*line));
+ if (!line)
+ return -ENOMEM;
+ memset(line, 0, sizeof(*line));
+
+ /* 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_TRAU);
+ e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU);
+
+ /* create signalling links for TS1 */
+ sign_ts = &line->ts[1-1];
+ oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
+ bts->c0, TEI_OML, SAPI_OML);
+ rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+ bts->c0, TEI_RSL, SAPI_RSL);
+
+ /* create back-links from bts/trx */
+ bts->oml_link = oml_link;
+ bts->c0->rsl_link = rsl_link;
+
+ /* enable subchannel demuxer on TS2 */
+ subch_demux_activate(&line->ts[2-1].trau.demux, 1);
+ subch_demux_activate(&line->ts[2-1].trau.demux, 2);
+ subch_demux_activate(&line->ts[2-1].trau.demux, 3);
+
+ /* enable subchannel demuxer on TS3 */
+ subch_demux_activate(&line->ts[3-1].trau.demux, 0);
+ subch_demux_activate(&line->ts[3-1].trau.demux, 1);
+ subch_demux_activate(&line->ts[3-1].trau.demux, 2);
+ subch_demux_activate(&line->ts[3-1].trau.demux, 3);
+
+#ifdef HAVE_TRX1
+ /* create E1 timeslots for TRAU frames of TRX1 */
+ e1inp_ts_config(&line->ts[4-1], line, E1INP_TS_TYPE_TRAU);
+ e1inp_ts_config(&line->ts[5-1], line, E1INP_TS_TYPE_TRAU);
+
+ /* create RSL signalling link for TRX1 */
+ sign_ts = &line->ts[1-1];
+ rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+ &bts->trx[1], TEI_RSL+1, SAPI_RSL);
+ /* create back-links from trx */
+ bts->trx[1].rsl_link = rsl_link;
+#endif
+
+ 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 = malloc(sizeof(*line));
+ if (!line)
+ return NULL;
+ memset(line, 0, sizeof(*line));
+
+ /* 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);
+}