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msuraev at sysmocom.de msuraev at sysmocom.deFrom: Max <msuraev at sysmocom.de>
Explicitly check if added (U|E)ARFCN will fit into available si2quater
message.
---
openbsc/include/openbsc/system_information.h | 1 +
openbsc/src/libbsc/bsc_vty.c | 23 +++++++-----
openbsc/src/libbsc/system_information.c | 21 ++++++++++-
openbsc/tests/gsm0408/gsm0408_test.c | 52 +++++++++++-----------------
openbsc/tests/gsm0408/gsm0408_test.ok | 5 +--
5 files changed, 60 insertions(+), 42 deletions(-)
diff --git a/openbsc/include/openbsc/system_information.h b/openbsc/include/openbsc/system_information.h
index ecc6964..7e3ceaa 100644
--- a/openbsc/include/openbsc/system_information.h
+++ b/openbsc/include/openbsc/system_information.h
@@ -11,6 +11,7 @@ unsigned uarfcn_size(const uint16_t *u, const uint16_t *sc, size_t u_len);
unsigned earfcn_size(const struct osmo_earfcn_si2q *e);
unsigned range1024_p(unsigned n);
unsigned range512_q(unsigned m);
+bool si2q_size_check(const struct gsm_bts *bts);
int bts_uarfcn_del(struct gsm_bts *bts, uint16_t arfcn, uint16_t scramble);
int bts_uarfcn_add(struct gsm_bts *bts, uint16_t arfcn, uint16_t scramble,
bool diversity);
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index cc46865..e81308b 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -2789,15 +2789,19 @@ DEFUN(cfg_bts_si2quater_neigh_add, cfg_bts_si2quater_neigh_add_cmd,
VTY_NEWLINE);
return CMD_WARNING;
}
+ if (si2q_size_check(bts)) {
+ if (e->thresh_hi && thresh != e->thresh_hi)
+ vty_out(vty, "Warning: multiple thresholds are not "
+ "supported, overriding previous threshold %u%s",
+ e->thresh_hi, VTY_NEWLINE);
- if (e->thresh_hi && thresh != e->thresh_hi)
- vty_out(vty, "Warning: multiple thresholds are not supported, "
- "overriding previous threshold %u%s",
- e->thresh_hi, VTY_NEWLINE);
-
- e->thresh_hi = thresh;
-
- return CMD_SUCCESS;
+ e->thresh_hi = thresh;
+ return CMD_SUCCESS;
+ }
+ vty_out(vty, "Warning: not enough space in si2quater for a given arfcn%s"
+ , VTY_NEWLINE);
+ osmo_earfcn_del(e, arfcn);
+ return CMD_WARNING;
}
DEFUN(cfg_bts_si2quater_neigh_del, cfg_bts_si2quater_neigh_del_cmd,
@@ -2835,6 +2839,9 @@ DEFUN(cfg_bts_si2quater_uarfcn_add, cfg_bts_si2quater_uarfcn_add_cmd,
case -ENOMEM:
vty_out(vty, "Unable to add arfcn: max number of UARFCNs (%u) "
"reached%s", MAX_EARFCN_LIST, VTY_NEWLINE);
+ case -ENOSPC:
+ vty_out(vty, "Warning: not enough space in si2quater for a "
+ "given arfcn%s", VTY_NEWLINE);
case -EADDRINUSE:
vty_out(vty, "Unable to add arfcn: (%u, %u) is already added%s",
arfcn, scramble, VTY_NEWLINE);
diff --git a/openbsc/src/libbsc/system_information.c b/openbsc/src/libbsc/system_information.c
index 8952534..3b0f889 100644
--- a/openbsc/src/libbsc/system_information.c
+++ b/openbsc/src/libbsc/system_information.c
@@ -134,6 +134,20 @@ unsigned uarfcn_size(const uint16_t *u, const uint16_t *sc, size_t u_len)
return 29 + range1024_p(u_len);
}
+bool si2q_size_check(const struct gsm_bts *bts)
+{
+ const struct osmo_earfcn_si2q *e = &bts->si_common.si2quater_neigh_list;
+ const uint16_t *u = bts->si_common.data.uarfcn_list,
+ *sc = bts->si_common.data.scramble_list;
+ size_t len = bts->si_common.uarfcn_length;
+ unsigned e_sz = e ? earfcn_size(e) : 1,
+ u_sz = len ? uarfcn_size(u, sc, len) : 1;
+ /* 2 bits are used in between UARFCN and EARFCN structs */
+ if (SI2Q_MIN_LEN + u_sz + 2 + e_sz > SI2Q_MAX_LEN)
+ return false;
+ return true;
+}
+
/* 3GPP TS 44.018, Table 9.1.54.1 - prepend diversity bit to scrambling code */
uint16_t encode_fdd(uint16_t scramble, bool diversity)
{
@@ -198,7 +212,12 @@ int bts_uarfcn_add(struct gsm_bts *bts, uint16_t arfcn, uint16_t scramble,
ual[k] = arfcn;
scl[k] = scr;
bts->si_common.uarfcn_length++;
- return 0;
+
+ if (si2q_size_check(bts))
+ return 0;
+
+ bts_uarfcn_del(bts, arfcn, scramble);
+ return -ENOSPC;
}
static inline int use_arfcn(const struct gsm_bts *bts, const bool bis, const bool ter,
diff --git a/openbsc/tests/gsm0408/gsm0408_test.c b/openbsc/tests/gsm0408/gsm0408_test.c
index 2d91b68..9262667 100644
--- a/openbsc/tests/gsm0408/gsm0408_test.c
+++ b/openbsc/tests/gsm0408/gsm0408_test.c
@@ -103,6 +103,16 @@ static inline void gen(struct gsm_bts *bts)
printf("failed to generate SI2quater: %s\n", strerror(-r));
}
+static inline void _bts_uarfcn_add(struct gsm_bts *bts, uint16_t arfcn,
+ uint16_t scramble, bool diversity)
+{
+ int r = bts_uarfcn_add(bts, arfcn, scramble, diversity);
+ if (r < 0)
+ printf("failed to add UARFCN to SI2quater: %s\n", strerror(-r));
+ else
+ gen(bts);
+}
+
static inline void test_si2q_u(void)
{
struct gsm_bts *bts;
@@ -113,37 +123,17 @@ static inline void test_si2q_u(void)
exit(1);
bts = gsm_bts_alloc(network);
- bts_uarfcn_add(bts, 1982, 13, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 44, 0);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 61, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 89, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 113, 0);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 123, 0);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 56, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 72, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 223, 1);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 14, 0);
- gen(bts);
-
- bts_uarfcn_add(bts, 1982, 88, 0);
+ _bts_uarfcn_add(bts, 1982, 13, 1);
+ _bts_uarfcn_add(bts, 1982, 44, 0);
+ _bts_uarfcn_add(bts, 1982, 61, 1);
+ _bts_uarfcn_add(bts, 1982, 89, 1);
+ _bts_uarfcn_add(bts, 1982, 113, 0);
+ _bts_uarfcn_add(bts, 1982, 123, 0);
+ _bts_uarfcn_add(bts, 1982, 56, 1);
+ _bts_uarfcn_add(bts, 1982, 72, 1);
+ _bts_uarfcn_add(bts, 1982, 223, 1);
+ _bts_uarfcn_add(bts, 1982, 14, 0);
+ _bts_uarfcn_add(bts, 1982, 88, 0);
gen(bts);
}
diff --git a/openbsc/tests/gsm0408/gsm0408_test.ok b/openbsc/tests/gsm0408/gsm0408_test.ok
index 565eac6..7b7a2cc 100644
--- a/openbsc/tests/gsm0408/gsm0408_test.ok
+++ b/openbsc/tests/gsm0408/gsm0408_test.ok
@@ -80,6 +80,7 @@ generated SI2quater: [23] 59 06 07 c0 00 25 0f 7c 34 1a 64 26 5d f2 05 04 86 59
generated SI2quater: [23] 59 06 07 c0 00 25 0f 7c 38 58 12 22 fd ce 8e 05 04 86 59 00 03 2b 2b
generated SI2quater: [23] 59 06 07 c0 00 25 0f 7c 40 58 1d 22 fa ce 88 85 7b 00 44 b2 00 03 2b
generated SI2quater: [23] 59 06 07 c0 00 25 0f 7c 4c 7a 34 0e 64 77 85 43 55 c8 10 99 64 00 0b
-failed to generate SI2quater: Cannot allocate memory
-failed to generate SI2quater: Cannot allocate memory
+failed to add UARFCN to SI2quater: No space left on device
+failed to add UARFCN to SI2quater: No space left on device
+generated SI2quater: [23] 59 06 07 c0 00 25 0f 7c 4c 7a 34 0e 64 77 85 43 55 c8 10 99 64 00 0b
Done.
--
2.8.1