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authorJacob Erlbeck <jerlbeck@sysmocom.de>2014-01-07 15:05:16 +0100
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2014-01-08 10:49:26 +0100
commitf46e226428a81c4faa12987c1b05457e60b43efe (patch)
tree1d48f6505d416114bfc2f9b306919164eb60a9c4
parent095bd36627a5d96a372b4924d0c0cbbc2fa98359 (diff)
nitb: Set the DST field in generated MM info messages
Currently the NET_DST information element (see GSM 24.008) is not included in generated MM info messages even when the DST field in the timezone info has been set via the VTY or the control interface. This patch modifies gsm48_tx_mm_info() to append this information element if (and only if) a non-zero DST has been configured. The DST IE is not part of GSM 4.8. Therefore it will only be sent, if the DST offset is configured to a value != 0. The DST functionality has been verified with wireshark by Jacob. Sponsored-by: On-Waves ehf
-rw-r--r--openbsc/src/libmsc/gsm_04_08.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 997e996bc..9063f9815 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -659,6 +659,7 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn)
struct tm* gmt_time;
struct tm* local_time;
int tzunits;
+ int dst = 0;
msg->lchan = conn->lchan;
@@ -752,6 +753,9 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn)
tzunits = tzunits + (bts->tz.mn/15);
ptr8[7] = bcdify(tzunits);
}
+ /* Convert DST value */
+ if (bts->tz.dst >= 0 && bts->tz.dst <= 2)
+ dst = bts->tz.dst;
}
else {
/* Need to get GSM offset and convert into 15 min units */
@@ -771,6 +775,17 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn)
}
else
ptr8[7] = bcdify(tzunits);
+
+ /* Does not support DST +2 */
+ if (local_time->tm_isdst)
+ dst = 1;
+ }
+
+ if (dst) {
+ ptr8 = msgb_put(msg, 3);
+ ptr8[0] = GSM48_IE_NET_DST;
+ ptr8[1] = 1;
+ ptr8[2] = dst;
}
DEBUGP(DMM, "-> MM INFO\n");