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[BSC] Keep a SYSTEM INFORMATION cache for each BTS

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This will later be useful for handover where we need to copy the cell
channel allocation into a normal 04.08 message
This commit is contained in:
Harald Welte
2010-06-15 16:44:12 +02:00
parent fd3708976a
commit 7401ae6a79
4 changed files with 166 additions and 41 deletions
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6
openbsc/include/openbsc/gsm_data.h
View File

@@ -43,6 +43,7 @@ enum gsm_chreq_reason_t {
#include <osmocore/timer.h>
#include <openbsc/gsm_04_08.h>
#include <openbsc/abis_rsl.h>
#include <openbsc/system_information.h>
#include <openbsc/mncc.h>
#include <osmocore/tlv.h>
#include <osmocore/bitvec.h>
@@ -393,6 +394,8 @@ struct gsm_bts_trx {
struct gsm_bts_trx_ts ts[TRX_NR_TS];
};
#define GSM_BTS_SI(bts, i) (void *)(bts->si_buf[i])
enum gsm_bts_type {
GSM_BTS_TYPE_UNKNOWN,
GSM_BTS_TYPE_BS11,
@@ -541,6 +544,9 @@ struct gsm_bts {
} data;
} si_common;
/* buffers where we put the pre-computed SI */
sysinfo_buf_t si_buf[_MAX_SYSINFO_TYPE];
/* ip.accesss Unit ID's have Site/BTS/TRX layout */
union {
struct {

35
openbsc/include/openbsc/system_information.h
View File

@@ -1,6 +1,39 @@
#ifndef _SYSTEM_INFO_H
#define _SYSTEM_INFO_H
int gsm_generate_si(u_int8_t *output, struct gsm_bts *bts, int type);
#define GSM_MACBLOCK_LEN 23
enum osmo_sysinfo_type {
SYSINFO_TYPE_NONE,
SYSINFO_TYPE_1,
SYSINFO_TYPE_2,
SYSINFO_TYPE_3,
SYSINFO_TYPE_4,
SYSINFO_TYPE_5,
SYSINFO_TYPE_6,
SYSINFO_TYPE_7,
SYSINFO_TYPE_8,
SYSINFO_TYPE_9,
SYSINFO_TYPE_10,
SYSINFO_TYPE_13,
SYSINFO_TYPE_16,
SYSINFO_TYPE_17,
SYSINFO_TYPE_18,
SYSINFO_TYPE_19,
SYSINFO_TYPE_20,
SYSINFO_TYPE_2bis,
SYSINFO_TYPE_2ter,
SYSINFO_TYPE_2quater,
SYSINFO_TYPE_5bis,
SYSINFO_TYPE_5ter,
/* FIXME all the various bis and ter */
_MAX_SYSINFO_TYPE
};
typedef u_int8_t sysinfo_buf_t[GSM_MACBLOCK_LEN];
uint8_t gsm_sitype2rsl(enum osmo_sysinfo_type si_type);
const char *gsm_sitype_name(enum osmo_sysinfo_type si_type);
int gsm_generate_si(struct gsm_bts *bts, enum osmo_sysinfo_type type);
#endif

55
openbsc/src/bsc_init.c
View File

@@ -782,54 +782,71 @@ int bsc_shutdown_net(struct gsm_network *net)
return 0;
}
static int generate_and_rsl_si(struct gsm_bts_trx *trx, enum osmo_sysinfo_type i)
{
struct gsm_bts *bts = trx->bts;
int rc;
rc = gsm_generate_si(bts, i);
if (rc < 0)
return rc;
DEBUGP(DRR, "SI%s: %s\n", gsm_sitype_name(i),
hexdump(GSM_BTS_SI(bts, i), GSM_MACBLOCK_LEN));
switch (i) {
case SYSINFO_TYPE_5:
case SYSINFO_TYPE_5bis:
case SYSINFO_TYPE_5ter:
case SYSINFO_TYPE_6:
rc = rsl_sacch_filling(trx, gsm_sitype2rsl(i),
GSM_BTS_SI(bts, i), rc);
break;
default:
rc = rsl_bcch_info(trx, gsm_sitype2rsl(i),
GSM_BTS_SI(bts, i), rc);
break;
}
return rc;
}
/* set all system information types */
static int set_system_infos(struct gsm_bts_trx *trx)
{
int i, rc;
u_int8_t si_tmp[23];
struct gsm_bts *bts = trx->bts;
bts->si_common.cell_sel_par.ms_txpwr_max_ccch =
ms_pwr_ctl_lvl(bts->band, bts->ms_max_power);
bts->si_common.cell_sel_par.neci = bts->network->neci;
if (trx == trx->bts->c0) {
for (i = 1; i <= 4; i++) {
rc = gsm_generate_si(si_tmp, trx->bts, i);
if (trx == bts->c0) {
for (i = SYSINFO_TYPE_1; i <= SYSINFO_TYPE_4; i++) {
rc = generate_and_rsl_si(trx, i);
if (rc < 0)
goto err_out;
DEBUGP(DRR, "SI%2u: %s\n", i, hexdump(si_tmp, rc));
rsl_bcch_info(trx, i, si_tmp, sizeof(si_tmp));
}
if (bts->gprs.mode != BTS_GPRS_NONE) {
i = 13;
rc = gsm_generate_si(si_tmp, trx->bts, RSL_SYSTEM_INFO_13);
rc = generate_and_rsl_si(trx, SYSINFO_TYPE_13);
if (rc < 0)
goto err_out;
DEBUGP(DRR, "SI%2u: %s\n", i, hexdump(si_tmp, rc));
rsl_bcch_info(trx, RSL_SYSTEM_INFO_13, si_tmp, rc);
}
}
i = 5;
rc = gsm_generate_si(si_tmp, trx->bts, RSL_SYSTEM_INFO_5);
rc = generate_and_rsl_si(trx, SYSINFO_TYPE_5);
if (rc < 0)
goto err_out;
DEBUGP(DRR, "SI%2u: %s\n", i, hexdump(si_tmp, rc));
rsl_sacch_filling(trx, RSL_SYSTEM_INFO_5, si_tmp, rc);
i = 6;
rc = gsm_generate_si(si_tmp, trx->bts, RSL_SYSTEM_INFO_6);
rc = generate_and_rsl_si(trx, SYSINFO_TYPE_6);
if (rc < 0)
goto err_out;
DEBUGP(DRR, "SI%2u: %s\n", i, hexdump(si_tmp, rc));
rsl_sacch_filling(trx, RSL_SYSTEM_INFO_6, si_tmp, rc);
return 0;
err_out:
LOGP(DRR, LOGL_ERROR, "Cannot generate SI %u for BTS %u, most likely "
"a problem with neighbor cell list generation\n",
i, trx->bts->nr);
i, bts->nr);
return rc;
}

111
openbsc/src/system_information.c
View File

@@ -1,7 +1,7 @@
/* GSM 04.08 System Information (SI) encoding and decoding
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
@@ -32,10 +32,10 @@
#include <openbsc/abis_rsl.h>
#include <openbsc/rest_octets.h>
#include <osmocore/bitvec.h>
#include <osmocore/utils.h>
#include <openbsc/debug.h>
#define GSM48_CELL_CHAN_DESC_SIZE 16
#define GSM_MACBLOCK_LEN 23
#define GSM_MACBLOCK_PADDING 0x2b
/* verify the sizes of the system information type structs */
@@ -240,6 +240,7 @@ static int generate_si1(u_int8_t *output, struct gsm_bts *bts)
/* SI1 Rest Octets (10.5.2.32), contains NCH position */
rc = rest_octets_si1(si1->rest_octets, NULL);
return sizeof(*si1) + rc;
}
@@ -474,8 +475,91 @@ static int generate_si13(u_int8_t *output, struct gsm_bts *bts)
return sizeof (*si13) + ret;
}
int gsm_generate_si(u_int8_t *output, struct gsm_bts *bts, int type)
static const uint8_t sitype2rsl[_MAX_SYSINFO_TYPE] = {
[SYSINFO_TYPE_1] = RSL_SYSTEM_INFO_1,
[SYSINFO_TYPE_2] = RSL_SYSTEM_INFO_2,
[SYSINFO_TYPE_3] = RSL_SYSTEM_INFO_3,
[SYSINFO_TYPE_4] = RSL_SYSTEM_INFO_4,
[SYSINFO_TYPE_5] = RSL_SYSTEM_INFO_5,
[SYSINFO_TYPE_6] = RSL_SYSTEM_INFO_6,
[SYSINFO_TYPE_7] = RSL_SYSTEM_INFO_7,
[SYSINFO_TYPE_8] = RSL_SYSTEM_INFO_8,
[SYSINFO_TYPE_9] = RSL_SYSTEM_INFO_9,
[SYSINFO_TYPE_10] = RSL_SYSTEM_INFO_10,
[SYSINFO_TYPE_13] = RSL_SYSTEM_INFO_13,
[SYSINFO_TYPE_16] = RSL_SYSTEM_INFO_16,
[SYSINFO_TYPE_17] = RSL_SYSTEM_INFO_17,
[SYSINFO_TYPE_18] = RSL_SYSTEM_INFO_18,
[SYSINFO_TYPE_19] = RSL_SYSTEM_INFO_19,
[SYSINFO_TYPE_20] = RSL_SYSTEM_INFO_20,
[SYSINFO_TYPE_2bis] = RSL_SYSTEM_INFO_2bis,
[SYSINFO_TYPE_2ter] = RSL_SYSTEM_INFO_2ter,
[SYSINFO_TYPE_2quater] = RSL_SYSTEM_INFO_2quater,
[SYSINFO_TYPE_5bis] = RSL_SYSTEM_INFO_5bis,
[SYSINFO_TYPE_5ter] = RSL_SYSTEM_INFO_5ter,
};
static const uint8_t rsl2sitype[0xff] = {
[RSL_SYSTEM_INFO_1] = SYSINFO_TYPE_1,
[RSL_SYSTEM_INFO_2] = SYSINFO_TYPE_2,
[RSL_SYSTEM_INFO_3] = SYSINFO_TYPE_3,
[RSL_SYSTEM_INFO_4] = SYSINFO_TYPE_4,
[RSL_SYSTEM_INFO_5] = SYSINFO_TYPE_5,
[RSL_SYSTEM_INFO_6] = SYSINFO_TYPE_6,
[RSL_SYSTEM_INFO_13] = SYSINFO_TYPE_13,
};
typedef int (*gen_si_fn_t)(uint8_t *output, struct gsm_bts *bts);
static const gen_si_fn_t gen_si_fn[_MAX_SYSINFO_TYPE] = {
[SYSINFO_TYPE_1] = &generate_si1,
[SYSINFO_TYPE_2] = &generate_si2,
[SYSINFO_TYPE_3] = &generate_si3,
[SYSINFO_TYPE_4] = &generate_si4,
[SYSINFO_TYPE_5] = &generate_si5,
[SYSINFO_TYPE_6] = &generate_si6,
[SYSINFO_TYPE_13] = &generate_si13,
};
static const struct value_string sitype_strs[] = {
{ SYSINFO_TYPE_1, "1" },
{ SYSINFO_TYPE_2, "2" },
{ SYSINFO_TYPE_3, "3" },
{ SYSINFO_TYPE_4, "4" },
{ SYSINFO_TYPE_5, "5" },
{ SYSINFO_TYPE_6, "6" },
{ SYSINFO_TYPE_7, "7" },
{ SYSINFO_TYPE_8, "8" },
{ SYSINFO_TYPE_9, "9" },
{ SYSINFO_TYPE_10, "10" },
{ SYSINFO_TYPE_13, "13" },
{ SYSINFO_TYPE_16, "16" },
{ SYSINFO_TYPE_17, "17" },
{ SYSINFO_TYPE_18, "18" },
{ SYSINFO_TYPE_19, "19" },
{ SYSINFO_TYPE_20, "20" },
{ SYSINFO_TYPE_2bis, "2bis" },
{ SYSINFO_TYPE_2ter, "2ter" },
{ SYSINFO_TYPE_2quater, "2quater" },
{ SYSINFO_TYPE_5bis, "5bis" },
{ SYSINFO_TYPE_5ter, "5ter" },
{ 0, NULL }
};
uint8_t gsm_sitype2rsl(enum osmo_sysinfo_type si_type)
{
return sitype2rsl[si_type];
}
const char *gsm_sitype_name(enum osmo_sysinfo_type si_type)
{
return get_value_string(sitype_strs, si_type);
}
int gsm_generate_si(struct gsm_bts *bts, enum osmo_sysinfo_type si_type)
{
gen_si_fn_t gen_si;
switch (bts->gprs.mode) {
case BTS_GPRS_EGPRS:
si13_default.cell_opts.ext_info_present = 1;
@@ -489,24 +573,9 @@ int gsm_generate_si(u_int8_t *output, struct gsm_bts *bts, int type)
break;
}
switch (type) {
case RSL_SYSTEM_INFO_1:
return generate_si1(output, bts);
case RSL_SYSTEM_INFO_2:
return generate_si2(output, bts);
case RSL_SYSTEM_INFO_3:
return generate_si3(output, bts);
case RSL_SYSTEM_INFO_4:
return generate_si4(output, bts);
case RSL_SYSTEM_INFO_5:
return generate_si5(output, bts);
case RSL_SYSTEM_INFO_6:
return generate_si6(output, bts);
case RSL_SYSTEM_INFO_13:
return generate_si13(output, bts);
default:
gen_si = gen_si_fn[si_type];
if (!gen_si)
return -EINVAL;
}
return 0;
return gen_si(bts->si_buf[si_type], bts);
}