[BSC] Keep a SYSTEM INFORMATION cache for each BTS
This will later be useful for handover where we need to copy the cell
channel allocation into a normal 04.08 message
diff --git a/openbsc/src/system_information.c b/openbsc/src/system_information.c
index 508787d..a142258 100644
--- a/openbsc/src/system_information.c
+++ b/openbsc/src/system_information.c
@@ -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 @@
/* 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 @@
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 @@
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);
}