Add NITZ (timezone) support as part of MM INFO
The UTC offset from the operating system will be used by default to
calculate the NITZ in MM INFO. However, a "timezone" vty command is
added at the BTS level, allowing BTS-specific overrides, e.g. in case
BTSs are distributed accross multiple timezones.
diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index f7a85a3..25e90ed 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -473,6 +473,11 @@
/* buffers where we put the pre-computed SI */
sysinfo_buf_t si_buf[_MAX_SYSINFO_TYPE];
+ /* TimeZone hours, mins, and bts specific */
+ int tzhr;
+ int tzmn;
+ int tz_bts_specific;
+
/* ip.accesss Unit ID's have Site/BTS/TRX layout */
union {
struct {
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index 724486f..ed74397 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -448,6 +448,8 @@
VTY_NEWLINE);
vty_out(vty, " training_sequence_code %u%s", bts->tsc, VTY_NEWLINE);
vty_out(vty, " base_station_id_code %u%s", bts->bsic, VTY_NEWLINE);
+ if (bts->tz_bts_specific != 0)
+ vty_out(vty, " timezone %d %d%s", bts->tzhr, bts->tzmn, VTY_NEWLINE);
vty_out(vty, " ms max power %u%s", bts->ms_max_power, VTY_NEWLINE);
vty_out(vty, " cell reselection hysteresis %u%s",
bts->si_common.cell_sel_par.cell_resel_hyst*2, VTY_NEWLINE);
@@ -1495,6 +1497,31 @@
return CMD_SUCCESS;
}
+DEFUN(cfg_bts_timezone,
+ cfg_bts_timezone_cmd,
+ "timezone <-19-19> (0|15|30|45)",
+ "Set the Timezone Offset of this BTS\n")
+{
+ struct gsm_bts *bts = vty->index;
+ int tzhr = atoi(argv[0]);
+ int tzmn = atoi(argv[1]);
+
+ bts->tzhr = tzhr;
+ bts->tzmn = tzmn;
+ bts->tz_bts_specific=1;
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_no_timezone,
+ cfg_bts_no_timezone_cmd,
+ "no timezone",
+ "disable bts specific timezone\n")
+{
+ struct gsm_bts *bts = vty->index;
+ bts->tz_bts_specific=0;
+ return CMD_SUCCESS;
+}
DEFUN(cfg_bts_unit_id,
cfg_bts_unit_id_cmd,
@@ -2691,6 +2718,8 @@
install_element(BTS_NODE, &cfg_bts_tsc_cmd);
install_element(BTS_NODE, &cfg_bts_bsic_cmd);
install_element(BTS_NODE, &cfg_bts_unit_id_cmd);
+ install_element(BTS_NODE, &cfg_bts_timezone_cmd);
+ install_element(BTS_NODE, &cfg_bts_no_timezone_cmd);
install_element(BTS_NODE, &cfg_bts_serno_cmd);
install_element(BTS_NODE, &cfg_bts_nokia_site_skip_reset_cmd);
install_element(BTS_NODE, &cfg_bts_stream_id_cmd);
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 7bf62b7..7c0d628 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -610,12 +610,17 @@
return gsm0408_authorize(conn, msg);
}
-#if 0
-static uint8_t to_bcd8(uint8_t val)
+/* Turn int into semi-octet representation: 98 => 0x89 */
+static uint8_t bcdify(uint8_t value)
{
- return ((val / 10) << 4) | (val % 10);
+ uint8_t ret;
+
+ ret = value / 10;
+ ret |= (value % 10) << 4;
+
+ return ret;
}
-#endif
+
/* Section 9.2.15a */
int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn)
@@ -623,13 +628,14 @@
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh;
struct gsm_network *net = conn->bts->network;
+ struct gsm_bts *bts = conn->bts;
uint8_t *ptr8;
int name_len, name_pad;
-#if 0
+
time_t cur_t;
- struct tm* cur_time;
- int tz15min;
-#endif
+ struct tm* gmt_time;
+ struct tm* local_time;
+ int tzunits;
msg->lchan = conn->lchan;
@@ -696,24 +702,48 @@
}
-#if 0
/* Section 10.5.3.9 */
cur_t = time(NULL);
- cur_time = gmtime(&cur_t);
+ gmt_time = gmtime(&cur_t);
+
ptr8 = msgb_put(msg, 8);
ptr8[0] = GSM48_IE_NET_TIME_TZ;
- ptr8[1] = to_bcd8(cur_time->tm_year % 100);
- ptr8[2] = to_bcd8(cur_time->tm_mon);
- ptr8[3] = to_bcd8(cur_time->tm_mday);
- ptr8[4] = to_bcd8(cur_time->tm_hour);
- ptr8[5] = to_bcd8(cur_time->tm_min);
- ptr8[6] = to_bcd8(cur_time->tm_sec);
- /* 02.42: coded as BCD encoded signed value in units of 15 minutes */
- tz15min = (cur_time->tm_gmtoff)/(60*15);
- ptr8[7] = to_bcd8(tz15min);
- if (tz15min < 0)
- ptr8[7] |= 0x80;
-#endif
+ ptr8[1] = bcdify(gmt_time->tm_year % 100);
+ ptr8[2] = bcdify(gmt_time->tm_mon + 1);
+ ptr8[3] = bcdify(gmt_time->tm_mday);
+ ptr8[4] = bcdify(gmt_time->tm_hour);
+ ptr8[5] = bcdify(gmt_time->tm_min);
+ ptr8[6] = bcdify(gmt_time->tm_sec);
+
+ if (bts->tz_bts_specific) {
+ /* Convert tzhr and tzmn to units */
+ if (bts->tzhr < 0) {
+ tzunits = ((bts->tzhr/-1)*4);
+ tzunits = tzunits + (bts->tzmn/15);
+ ptr8[7] = bcdify(tzunits);
+ /* Set negative time */
+ ptr8[7] |= 0x08;
+ }
+ else {
+ tzunits = bts->tzhr*4;
+ tzunits = tzunits + (bts->tzmn/15);
+ ptr8[7] = bcdify(tzunits);
+ }
+ }
+ else {
+ /* Need to get GSM offset and convert into 15 min units */
+ /* This probably breaks if gmtoff returns a value not evenly divisible by 15? */
+ local_time = localtime(&cur_t);
+ tzunits = (local_time->tm_gmtoff/60)/15;
+ if (tzunits < 0) {
+ tzunits = tzunits/-1;
+ ptr8[7] = bcdify(tzunits);
+ /* Flip it to negative */
+ ptr8[7] |= 0x08;
+ }
+ else
+ ptr8[7] = bcdify(tzunits);
+ }
DEBUGP(DMM, "-> MM INFO\n");