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gerrit.osmocom.org / osmo-gbproxy / a8379774eeb334ebd231c637863a99ff3552a4a7 / . / openbsc / src / e1_config.c
blob: abc30402f151e23e90dfff621e07bcd4c42047b1 [file] [log] [blame]
Harald Welte59b04682009-06-10 05:40:52 +0800[diff] [blame]1#include <string.h>
2#include <errno.h>
3
4#include <netinet/in.h>
5
6#include <openbsc/gsm_data.h>
7#include <openbsc/e1_input.h>
8#include <openbsc/trau_frame.h>
9#include <openbsc/trau_mux.h>
10#include <openbsc/misdn.h>
Harald Weltea8379772009-06-20 22:36:41 +0200[diff] [blame^]11#include <openbsc/talloc.h>
Harald Welte59b04682009-06-10 05:40:52 +0800[diff] [blame]12
13#define SAPI_L2ML 0
14#define SAPI_OML 62
15#define SAPI_RSL 0 /* 63 ? */
16
17#define TEI_L2ML 127
18#define TEI_OML 25
19#define TEI_RSL 1
20
21/* do some compiled-in configuration for our BTS/E1 setup */
22int e1_config(struct gsm_bts *bts, int cardnr, int release_l2)
23{
24 struct e1inp_line *line;
25 struct e1inp_ts *sign_ts;
26 struct e1inp_sign_link *oml_link, *rsl_link;
27
Harald Weltea8379772009-06-20 22:36:41 +0200[diff] [blame^]28 line = talloc(tall_bsc_ctx, struct e1inp_line);
Harald Welte59b04682009-06-10 05:40:52 +0800[diff] [blame]29 if (!line)
30 return -ENOMEM;
31 memset(line, 0, sizeof(*line));
32
33 /* create E1 timeslots for signalling and TRAU frames */
34 e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
35 e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_TRAU);
36 e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU);
37
38 /* create signalling links for TS1 */
39 sign_ts = &line->ts[1-1];
40 oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
41 bts->c0, TEI_OML, SAPI_OML);
42 rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
43 bts->c0, TEI_RSL, SAPI_RSL);
44
45 /* create back-links from bts/trx */
46 bts->oml_link = oml_link;
47 bts->c0->rsl_link = rsl_link;
48
49 /* enable subchannel demuxer on TS2 */
50 subch_demux_activate(&line->ts[2-1].trau.demux, 1);
51 subch_demux_activate(&line->ts[2-1].trau.demux, 2);
52 subch_demux_activate(&line->ts[2-1].trau.demux, 3);
53
54 /* enable subchannel demuxer on TS3 */
55 subch_demux_activate(&line->ts[3-1].trau.demux, 0);
56 subch_demux_activate(&line->ts[3-1].trau.demux, 1);
57 subch_demux_activate(&line->ts[3-1].trau.demux, 2);
58 subch_demux_activate(&line->ts[3-1].trau.demux, 3);
59
60#ifdef HAVE_TRX1
61 /* create E1 timeslots for TRAU frames of TRX1 */
62 e1inp_ts_config(&line->ts[4-1], line, E1INP_TS_TYPE_TRAU);
63 e1inp_ts_config(&line->ts[5-1], line, E1INP_TS_TYPE_TRAU);
64
65 /* create RSL signalling link for TRX1 */
66 sign_ts = &line->ts[1-1];
67 rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
68 &bts->trx[1], TEI_RSL+1, SAPI_RSL);
69 /* create back-links from trx */
70 bts->trx[1].rsl_link = rsl_link;
71#endif
72
73 return mi_setup(cardnr, line, release_l2);
74}
75
76/* configure pseudo E1 line in ip.access style and connect to BTS */
77int ia_config_connect(struct gsm_bts *bts, struct sockaddr_in *sin)
78{
79 struct e1inp_line *line;
80 struct e1inp_ts *sign_ts, *rsl_ts;
81 struct e1inp_sign_link *oml_link, *rsl_link;
82
Harald Weltea8379772009-06-20 22:36:41 +0200[diff] [blame^]83 line = talloc(tall_bsc_ctx, struct e1inp_line);
Harald Welte59b04682009-06-10 05:40:52 +0800[diff] [blame]84 if (!line)
Harald Weltea8379772009-06-20 22:36:41 +0200[diff] [blame^]85 return -ENOMEM;
Harald Welte59b04682009-06-10 05:40:52 +0800[diff] [blame]86 memset(line, 0, sizeof(*line));
87
88 /* create E1 timeslots for signalling and TRAU frames */
89 e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
90 e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_SIGN);
91
92 /* create signalling links for TS1 */
93 sign_ts = &line->ts[1-1];
94 rsl_ts = &line->ts[2-1];
95 oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
96 bts->c0, 0, 0xff);
97 rsl_link = e1inp_sign_link_create(rsl_ts, E1INP_SIGN_RSL,
98 bts->c0, 0, 0);
99
100 /* create back-links from bts/trx */
101 bts->oml_link = oml_link;
102 bts->c0->rsl_link = rsl_link;
103
104 /* default port at BTS for incoming connections is 3006 */
105 if (sin->sin_port == 0)
106 sin->sin_port = htons(3006);
107
108 return ipaccess_connect(line, sin);
109}